diff --git a/cli/copr_cli/main.py b/cli/copr_cli/main.py
index 9347dfaad..42fa23faa 100644
--- a/cli/copr_cli/main.py
+++ b/cli/copr_cli/main.py
@@ -712,6 +712,7 @@ def action_create(self, args):
             packit_forge_projects_allowed=args.packit_forge_projects_allowed,
             repo_priority=args.repo_priority,
             storage=args.storage,
+            tags=args.tags,
         )
 
         owner_part = username.replace('@', "g/")
@@ -746,6 +747,7 @@ def action_modify_project(self, args):
             runtime_dependencies=args.runtime_dependencies,
             packit_forge_projects_allowed=args.packit_forge_projects_allowed,
             repo_priority=args.repo_priority,
+            tags=args.tags,
         )
 
     @requires_api_auth
@@ -1306,6 +1308,11 @@ def create_and_modify_common_opts(parser):
             "all repositories in the theproject organization). "
             "Can be specified multiple times."
     ))
+    parser.add_argument(
+        "--tags", dest="tags", metavar="TAG", action="append", help=(
+            "Tag to attach to this project, e.g. cli. "
+            "Can be specified multiple times."
+    ))
 
 
 def setup_parser():
diff --git a/cli/man/copr-cli.1.asciidoc b/cli/man/copr-cli.1.asciidoc
index 41566c6a9..d5809e490 100644
--- a/cli/man/copr-cli.1.asciidoc
+++ b/cli/man/copr-cli.1.asciidoc
@@ -116,6 +116,7 @@ usage: copr-cli create [-h] --chroot CHROOTS [--repo REPOS]
                        [--persistent]
                        [--auto-prune {on,off}]
                        [--isolation {default, nspawn, simple}]
+                       [--tags TAG]
                        name
 
 --chroot::
@@ -124,6 +125,9 @@ Chroot to use for this project. Can be specified multiple times, but at least on
 --repo::
 Repository to add to this project. Can be specified multiple times.
 
+--tags::
+Tag to attach to this project, e.g. cli. Can be specified multiple times.
+
 --initial-pkgs::
 List of packages to build in this new project. Can be specified multiple times.
 
@@ -166,6 +170,7 @@ usage: copr-cli modify [-h] [--repo REPOS]
                        [--unlisted-on-hp {on,off}]
                        [--auto-prune {on,off}]
                        [--isolation {default, nspawn, simple}]
+                       [--tags TAG]
                        name
 
 Alters only specified project property.
@@ -179,6 +184,11 @@ When this option is not used, chroots in the project remain unchanged.
 Once you specify a chroot, it is going to be enabled in the project, but
 current chroots will not be preserved if they are not specified.
 
+--tags::
+Tag to attach to this project, e.g. cli. Can be specified multiple times.
+When this option is not used, tags on the project remain unchanged; once
+specified, it replaces the full set of tags on the project.
+
 --description::
 Description of the project.
 
diff --git a/cli/tests/test_cli.py b/cli/tests/test_cli.py
index 09bf98c71..3af01fa8c 100644
--- a/cli/tests/test_cli.py
+++ b/cli/tests/test_cli.py
@@ -576,6 +576,7 @@ def test_create_project(config_from_file, project_proxy_add, capsys):
         "packit_forge_projects_allowed": None,
         "repo_priority": None,
         "storage": None,
+        "tags": None,
     }
     assert stdout == "New project was successfully created: http://copr/coprs/jdoe/foo/\n"
 
@@ -674,6 +675,7 @@ def test_create_multilib_project(config_from_file, project_proxy_add, capsys):
         "packit_forge_projects_allowed": None,
         "repo_priority": None,
         "storage": None,
+        "tags": None,
     }
     assert stdout == "New project was successfully created: http://copr/coprs/jdoe/foo/\n"
 
diff --git a/frontend/copr-frontend.spec b/frontend/copr-frontend.spec
index 708de1315..5790699a8 100644
--- a/frontend/copr-frontend.spec
+++ b/frontend/copr-frontend.spec
@@ -80,6 +80,7 @@ BuildRequires: python3dist(beautifulsoup4)
 BuildRequires: python3dist(copr-common) >= %copr_common_version
 BuildRequires: python3dist(email-validator)
 BuildRequires: python3dist(python-dateutil)
+BuildRequires: python3dist(python-slugify)
 BuildRequires: python3dist(decorator)
 BuildRequires: python3dist(flask)
 BuildRequires: python3dist(templated-dictionary)
@@ -137,6 +138,7 @@ Requires: python3dist(alembic)
 Requires: python3dist(blinker)
 Requires: python3dist(copr-common) >= %copr_common_version
 Requires: python3dist(python-dateutil)
+Requires: python3dist(python-slugify)
 Requires: python3dist(email-validator)
 Requires: python3dist(flask)
 Requires: python3dist(flask-caching)
diff --git a/frontend/coprs_frontend/alembic/versions/fe7f7d55dde3_add_project_tags.py b/frontend/coprs_frontend/alembic/versions/fe7f7d55dde3_add_project_tags.py
new file mode 100644
index 000000000..347500e4c
--- /dev/null
+++ b/frontend/coprs_frontend/alembic/versions/fe7f7d55dde3_add_project_tags.py
@@ -0,0 +1,49 @@
+"""
+add project tags
+
+Revision ID: fe7f7d55dde3
+Create Date: 2026-08-23 12:23:00.181615
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = 'fe7f7d55dde3'
+down_revision = 'e31b4af2468c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table(
+        'project_tag',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(length=50), nullable=False),
+        sa.Column('is_default', sa.Boolean(), server_default='0', nullable=False),
+        sa.Column('created_on', sa.Integer(), nullable=True),
+        sa.Column('user_id', sa.Integer(), nullable=True),
+        sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('name'),
+    )
+    op.create_index(op.f('ix_project_tag_name'), 'project_tag', ['name'], unique=True)
+
+    op.create_table(
+        'copr_project_tag',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('copr_id', sa.Integer(), nullable=False),
+        sa.Column('project_tag_id', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['copr_id'], ['copr.id'], ),
+        sa.ForeignKeyConstraint(['project_tag_id'], ['project_tag.id'], ),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('copr_id', 'project_tag_id',
+                            name='copr_project_tag_copr_id_project_tag_id_uniq'),
+    )
+    op.create_index(op.f('ix_copr_project_tag_copr_id'), 'copr_project_tag', ['copr_id'], unique=False)
+    op.create_index(op.f('ix_copr_project_tag_project_tag_id'), 'copr_project_tag', ['project_tag_id'], unique=False)
+
+
+def downgrade():
+    op.drop_table('copr_project_tag')
+    op.drop_table('project_tag')
diff --git a/frontend/coprs_frontend/coprs/forms.py b/frontend/coprs_frontend/coprs/forms.py
index df7fc26f1..cffb17f4a 100644
--- a/frontend/coprs_frontend/coprs/forms.py
+++ b/frontend/coprs_frontend/coprs/forms.py
@@ -7,6 +7,7 @@
 
 import flask
 import wtforms
+from slugify import slugify
 
 from flask_wtf.file import FileRequired, FileField, MultipleFileField
 
@@ -20,7 +21,8 @@
 from coprs import exceptions
 from coprs import helpers
 from coprs import models
-from coprs.logic.coprs_logic import CoprsLogic, MockChrootsLogic
+
+from coprs.logic.coprs_logic import CoprsLogic, MockChrootsLogic, ProjectTagsLogic
 from coprs.logic.users_logic import UsersLogic
 from coprs.logic.dist_git_logic import DistGitLogic
 from coprs.logic.complex_logic import ComplexLogic
@@ -213,6 +215,89 @@ def __init__(self, label="", validators=None, copr=None, **kwargs):
         self.default = [ch for ch in active_names if ch in copr_chroot_names]
 
 
+class AdditionalProjectTagsField(wtforms.StringField):
+    """
+    Input fields for project tags
+    """
+    def __init__(self, label="", validators=None, copr=None, **kwargs):
+        """
+        Pre-fill the field with `copr`'s existing non-default tag names, if given.
+        """
+        super().__init__(label, validators, **kwargs)
+        self.label = label or "Additional tags"
+        self.data = ""
+        if copr:
+            custom_names = [t.name for t in copr.project_tags if not t.is_default]
+            self.default = ", ".join(custom_names)
+
+    def process_formdata(self, valuelist):
+        """
+        Join multiple submitted values into comma separated string
+        """
+        self.data = ", ".join(valuelist) if valuelist else ""
+
+    def _value(self):
+        """
+        Render the field's current data back into its comma-separated string form.
+        """
+        if self.data:
+            return ", ".join(self.data)
+        return ""
+
+
+class ProjectTagsFilter:
+    """
+    Turn comma separated tag names into deduplicated, slugified tag names.
+    """
+    @staticmethod
+    def normalize_tag_name(name):
+        """
+        Remove non-ascii characters and slugify the tag name.
+        """
+        encoded_name = name.encode("ascii", "ignore").decode("ascii")
+        slugified_name = slugify(encoded_name, max_length=50)
+        return slugified_name
+
+    def __call__(self, value):
+        """
+        Split a comma-separated string into cleaned, deduplicated tag names.
+        """
+        if not value:
+            return []
+        cleaned = []
+        for name in value.split(","):
+            normalized_name = self.normalize_tag_name(name)
+            if normalized_name and len(normalized_name) >= 3:
+                cleaned.append(normalized_name)
+        return list(dict.fromkeys(cleaned))
+
+
+class DefaultTagsField(MultiCheckboxField):
+    """
+    Checkboxes for default tags
+    """
+    # pylint: disable=too-few-public-methods
+    def __init__(self, label="", validators=None, copr=None, **kwargs):
+        """
+        Build the default-tag checkbox choices and pre-tick `copr`'s own default tags, if given.
+        """
+        super().__init__(label, validators, **kwargs)
+        self.label = label or "Default tags"
+
+        default_tag_names = [t.name for t in ProjectTagsLogic.get_default_tags()]
+        self.choices = [(name, name) for name in default_tag_names]
+        self.default = self.ticked_default_names(copr)
+
+    @staticmethod
+    def ticked_default_names(copr):
+        """
+        Display the default tags that were already selected.
+        """
+        if not copr:
+            return []
+        return [t.name for t in copr.project_tags if t.is_default]
+
+
 class UrlListValidator(object):
 
     def __init__(self, message=None):
@@ -589,6 +674,13 @@ class CoprForm(BaseForm):
 
     chroots = ChrootsField()
 
+    default_tags = DefaultTagsField()
+
+    tags = AdditionalProjectTagsField(
+        "Additional tags",
+        filters=[ProjectTagsFilter()],
+    )
+
     description = wtforms.TextAreaField("Description")
 
     instructions = wtforms.TextAreaField("Instructions")
@@ -806,6 +898,14 @@ class F(CoprForm):
             # a list of default chroots based on `copr`
             chroots = ChrootsField(copr=copr)
 
+            # We are redefining the original `CoprForm` field because we need to
+            # pre-tick the default tags already set on `copr`
+            default_tags = DefaultTagsField(copr=copr)
+
+            # We are redefining the original `CoprForm` field because we need to
+            # pre-fill the project's existing non-default tags
+            tags = AdditionalProjectTagsField(copr=copr, filters=[ProjectTagsFilter()])
+
             @property
             def selected_chroots(self):
                 return self.chroots.data
diff --git a/frontend/coprs_frontend/coprs/logic/coprs_logic.py b/frontend/coprs_frontend/coprs/logic/coprs_logic.py
index d678ee529..40fdb03ad 100644
--- a/frontend/coprs_frontend/coprs/logic/coprs_logic.py
+++ b/frontend/coprs_frontend/coprs/logic/coprs_logic.py
@@ -14,7 +14,7 @@
 from sqlalchemy import func
 from sqlalchemy.event import listens_for
 from sqlalchemy.exc import IntegrityError
-from sqlalchemy.orm import joinedload
+from sqlalchemy.orm import joinedload, selectinload
 from sqlalchemy.orm.attributes import NEVER_SET, NO_VALUE
 from sqlalchemy.orm.exc import NoResultFound
 from sqlalchemy.orm.attributes import get_history
@@ -53,6 +53,8 @@ def get_all(cls):
         query = (db.session.query(models.Copr)
                  .join(models.Copr.user)
                  .options(db.contains_eager(models.Copr.user))
+                 .options(selectinload(models.Copr.copr_project_tags)
+                         .joinedload(models.CoprProjectTag.project_tag))
                  .filter(models.Copr.deleted == False))
         return query
 
@@ -133,6 +135,8 @@ def get_multiple(cls, include_deleted=False, include_unlisted_on_hp=True):
             .join(models.Copr.user)
             .outerjoin(models.Group)
             .options(db.contains_eager(models.Copr.user))
+            .options(selectinload(models.Copr.copr_project_tags)
+                    .joinedload(models.CoprProjectTag.project_tag))
         )
 
         if not include_deleted:
@@ -259,7 +263,9 @@ def get_multiple_fulltext(cls, fulltext=None, projectname=None,
             fulltext = None
 
         query = (models.Copr.query.order_by(desc(models.Copr.created_on))
-                 .filter(models.Copr.deleted == False))
+                 .filter(models.Copr.deleted == False)
+                 .options(selectinload(models.Copr.copr_project_tags)
+                         .joinedload(models.CoprProjectTag.project_tag)))
 
         if projectname:
             value = "%{}%".format(projectname)
@@ -286,6 +292,18 @@ def get_multiple_fulltext(cls, fulltext=None, projectname=None,
 
         return query
 
+    @classmethod
+    def get_copr_projects_by_tag_name(cls, tag_name):
+        """
+        Get all coprs that have the given project tag
+        """
+        query = cls.get_multiple()
+        return (
+            query.join(models.Copr.copr_project_tags)
+            .join(models.CoprProjectTag.project_tag)
+            .filter(models.ProjectTag.name == tag_name)
+        )
+
     @classmethod
     def add(cls, user, name, selected_chroots, repos=None, description=None,
             instructions=None, check_for_duplicates=False, group=None, persistent=False,
@@ -498,6 +516,83 @@ def raise_if_packit_forge_project_cant_build_in_copr(cls, copr, packit_forge_pro
         )
 
 
+class ProjectTagsLogic:
+    """
+    Logic for project tags
+    """
+    @classmethod
+    def get_tag(cls, name):
+        """
+        Get a project tag by its name
+        """
+        return models.ProjectTag.query.filter(models.ProjectTag.name == name).first()
+
+    @classmethod
+    def new_tag(cls, name, user=None):
+        """
+        Create new project tag
+        """
+        tag = models.ProjectTag(name=name, created_on=int(time.time()), user=user)
+        db.session.add(tag)
+        return tag
+
+    @classmethod
+    def create_tag(cls, name, user=None):
+        """
+        Get or create a project tag
+        """
+        tag = cls.get_tag(name)
+        if tag:
+            return tag
+        return cls.new_tag(name, user=user)
+
+    @classmethod
+    def get_tags_by_names(cls, names):
+        """
+        Get existing project tags matching names
+        """
+        return {t.name: t for t in
+                models.ProjectTag.query.filter(models.ProjectTag.name.in_(names))}
+
+    @classmethod
+    def get_default_tags(cls):
+        """
+        Get only the default (admin-curated) project tags
+        """
+        return (models.ProjectTag.query
+                .filter_by(is_default=True)
+                .options(joinedload(models.ProjectTag.user))
+                .order_by(models.ProjectTag.name))
+
+    @classmethod
+    def set_copr_tags(cls, copr, tag_names, user=None):
+        """
+        Set the tags for a copr project
+        """
+        names = list(dict.fromkeys(tag_names))
+        if len(names) > 10:
+            raise exceptions.BadRequest("A project can have at most 10 tags.")
+
+        existing = cls.get_tags_by_names(names)
+        new_tags = [existing.get(name) or cls.new_tag(name, user=user) for name in names]
+
+        current_tags = list(copr.project_tags)
+        for tag in current_tags:
+            if tag not in new_tags:
+                copr.project_tags.remove(tag)
+        for tag in new_tags:
+            if tag not in current_tags:
+                copr.project_tags.append(tag)
+
+    @classmethod
+    def delete_tag(cls, tag):
+        """
+        Delete a project tag
+        """
+        models.CoprProjectTag.query.filter_by(project_tag_id=tag.id).delete()
+        db.session.delete(tag)
+
+
 class CoprPermissionsLogic(object):
     @classmethod
     def get(cls, copr, searched_user):
diff --git a/frontend/coprs_frontend/coprs/models.py b/frontend/coprs_frontend/coprs/models.py
index 4317ac65c..c4b8c3ef1 100644
--- a/frontend/coprs_frontend/coprs/models.py
+++ b/frontend/coprs_frontend/coprs/models.py
@@ -308,6 +308,42 @@ class CoprScore(db.Model, helpers.Serializer):
                             name="copr_score_copr_id_user_id_uniq"),
     )
 
+
+class ProjectTag(db.Model, helpers.Serializer):
+    """
+    Project tags attached to copr projects.
+    """
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(50), nullable=False, unique=True, index=True)
+    # default tags that would appear when creating a copr project
+    # configured by the admin
+    is_default = db.Column(db.Boolean, default=False, nullable=False,
+                          server_default="0")
+    created_on = db.Column(db.Integer)
+    user_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=True)
+    user = db.relationship("User")
+
+
+class CoprProjectTag(db.Model, helpers.Serializer):
+    """
+    Many to many relation between copr and project_tag.
+    """
+    id = db.Column(db.Integer, primary_key=True)
+    copr_id = db.Column(db.Integer, db.ForeignKey("copr.id"), nullable=False, index=True)
+    project_tag_id = db.Column(db.Integer, db.ForeignKey("project_tag.id"), nullable=False, index=True)
+
+    project_tag = db.relationship("ProjectTag")
+    copr = db.relationship("Copr",
+                           backref=db.backref(
+                               "copr_project_tags",
+                               cascade="all,delete,delete-orphan"))
+
+    __table_args__ = (
+        db.UniqueConstraint("copr_id", "project_tag_id",
+                            name="copr_project_tag_copr_id_project_tag_id_uniq"),
+    )
+
+
 _group_unique_where = text("deleted is not true and group_id is not null")
 _user_unique_where = text("deleted is not true and group_id is null")
 
@@ -453,6 +489,9 @@ class Copr(db.Model, helpers.Serializer, CoprSearchRelatedData):
     # relations
     user = db.relationship("User", backref=db.backref("coprs"))
     group = db.relationship("Group", backref=db.backref("groups"))
+    project_tags = association_proxy(
+        "copr_project_tags", "project_tag",
+        creator=lambda project_tag: CoprProjectTag(project_tag=project_tag))
     mock_chroots = association_proxy("copr_chroots", "mock_chroot")
     forked_from = db.relationship("Copr",
             remote_side=_CoprPublic.id,
diff --git a/frontend/coprs_frontend/coprs/static/css/custom-styles.css b/frontend/coprs_frontend/coprs/static/css/custom-styles.css
index 045980b48..c17ab898f 100644
--- a/frontend/coprs_frontend/coprs/static/css/custom-styles.css
+++ b/frontend/coprs_frontend/coprs/static/css/custom-styles.css
@@ -62,3 +62,7 @@ input.input-field-12em {
     margin-top: 10px;
     margin-right: 20px;
 }
+
+.tag-btn {
+    margin: 0 4px 4px 0;
+}
diff --git a/frontend/coprs_frontend/coprs/templates/_helpers.html b/frontend/coprs_frontend/coprs/templates/_helpers.html
index f2585c11a..c1a194a7a 100644
--- a/frontend/coprs_frontend/coprs/templates/_helpers.html
+++ b/frontend/coprs_frontend/coprs/templates/_helpers.html
@@ -844,6 +844,15 @@ <h3 class="list-group-item-heading" style="display: inline;">
           </small>
         </li>
       {% endfor %}
+      {% if copr.project_tags %}
+        <li>
+          <strong>Tags:</strong>
+          <small>
+          {% for tag in copr.project_tags[:6] %}{{ tag.name }}{% if not loop.last %}, {% endif %}{% endfor %}
+          {% if copr.project_tags|length > 6 %}, +{{ copr.project_tags|length - 6 }} more{% endif %}
+          </small>
+        </li>
+      {% endif %}
       </ul>
     </span>
 </a>
diff --git a/frontend/coprs_frontend/coprs/templates/admin/layout.html b/frontend/coprs_frontend/coprs/templates/admin/layout.html
index 84e829086..818c2d2e2 100644
--- a/frontend/coprs_frontend/coprs/templates/admin/layout.html
+++ b/frontend/coprs_frontend/coprs/templates/admin/layout.html
@@ -29,6 +29,7 @@ <h1 class="project-name"> Copr Administration </h1>
 
   <ul class="nav nav-tabs">
     {{ nav_element("legalflags", "Legal Flags", "pficon pficon-flag", url_for('admin_ns.legal_flag')) }}
+    {{ nav_element("tags", "Tags", "fa fa-tag", url_for('admin_ns.tags')) }}
     {{ nav_element("playground", "Playground", "fa fa-gamepad", url_for('admin_ns.playground')) }}
   </ul>
 
diff --git a/frontend/coprs_frontend/coprs/templates/admin/tags.html b/frontend/coprs_frontend/coprs/templates/admin/tags.html
new file mode 100644
index 000000000..802deb35a
--- /dev/null
+++ b/frontend/coprs_frontend/coprs/templates/admin/tags.html
@@ -0,0 +1,61 @@
+{% extends "admin/layout.html" %}
+
+{% set selected_tab = "tags" %}
+
+{% block admin_body %}
+<h2 class="page-title"> Tags </h2>
+
+<form method="post" action="{{ url_for('admin_ns.tag_create') }}" class="form-inline" style="margin-bottom:15px">
+  <input type="text" name="name" class="form-control" placeholder="New default tag name, e.g. cli or cli, devtools" style="width:320px">
+  <input class="btn btn-primary" type="submit" value="Create">
+  <span class="help-block">Creates the tag (if it doesn't already exist) and marks it as default immediately. Comma-separated for multiple.</span>
+</form>
+
+<table class="table table-striped table-bordered">
+  <thead>
+    <tr>
+      <th>Name</th>
+      <th>Created by</th>
+      <th>Created on</th>
+      <th></th>
+    </tr>
+  </thead>
+  <tbody>
+  {% for tag in tags %}
+    <tr>
+      <td>
+        <form method="post" action="{{ url_for('admin_ns.tag_rename', tag_id=tag.id) }}" class="form-inline">
+          <input type="text" name="name" class="form-control input-sm" value="{{ tag.name }}" style="width:140px">
+          <input class="btn btn-xs btn-default" type="submit" value="Rename">
+        </form>
+      </td>
+      <td>
+        {% if tag.user %}
+        <a href="{{ url_for('coprs_ns.coprs_by_user', username=tag.user.name) }}">{{ tag.user.name }}</a>
+        {% else %}
+        <span class="text-muted">system</span>
+        {% endif %}
+      </td>
+      <td>
+        {% if tag.created_on %}
+        <span title="{{ tag.created_on | localized_time(g.user.timezone if g.user else 'UTC') }}">{{ tag.created_on | time_ago() }} ago</span>
+        {% else %}
+        <span class="text-muted">unknown</span>
+        {% endif %}
+      </td>
+      <td>
+        <form method="post" action="{{ url_for('admin_ns.tag_delete', tag_id=tag.id) }}" style="display:inline"
+              onsubmit="return confirm('Delete tag \'{{ tag.name }}\'? It will be removed from every project that has it.');">
+          <input class="btn btn-xs btn-danger" type="submit" value="Delete">
+        </form>
+      </td>
+    </tr>
+  {% else %}
+    <tr>
+      <td colspan="4"> No tags have been created yet. </td>
+    </tr>
+  {% endfor %}
+  </tbody>
+</table>
+
+{% endblock %}
diff --git a/frontend/coprs_frontend/coprs/templates/coprs/_coprs_forms.html b/frontend/coprs_frontend/coprs/templates/coprs/_coprs_forms.html
index d94a18544..077806dd6 100644
--- a/frontend/coprs_frontend/coprs/templates/coprs/_coprs_forms.html
+++ b/frontend/coprs_frontend/coprs/templates/coprs/_coprs_forms.html
@@ -42,6 +42,26 @@ <h3 class="panel-title">{{ counter('instructions') }}. Project information</h3>
     {{ render_field(form.description, rows=5, cols=50, placeholder='Optional - describe your project briefly.',
           info='You can use <a href="http://daringfireball.net/projects/markdown/syntax">markdown syntax</a>, inline HTML is forbidden.') }}
 
+    {% if form.default_tags.choices %}
+    <div class="form-group">
+      <label class="col-sm-2 control-label" for="textInput-markup">
+        Default tags
+      </label>
+      <div class="col-sm-10">
+      {% for tag in form.default_tags %}
+        <div class="checkbox">
+          <label>
+            {{ tag }}
+            {{ tag.label }}
+          </label>
+        </div>
+      {% endfor %}
+     </div>
+    </div>
+    {% endif %}
+
+    {{ render_field(form.tags, placeholder='Optional - comma separated tags, e.g. cli, devtools, monitoring', info='Add any tag not in the default list above; new tags are created automatically.') }}
+
     {{ render_field(form.instructions, rows=5, cols=50, placeholder='Optional - describe how your project can be installed. Where users can report bugs and issues. Link to wiki is good as well.', info='You can use <a href="http://daringfireball.net/projects/markdown/syntax">markdown syntax</a>, inline HTML is forbidden.') }}
 
     {{ render_field(form.homepage, label='Homepage', placeholder='Optional - project homepage') }}
diff --git a/frontend/coprs_frontend/coprs/templates/coprs/detail/overview.html b/frontend/coprs_frontend/coprs/templates/coprs/detail/overview.html
index ba08f5e16..a9b139b27 100644
--- a/frontend/coprs_frontend/coprs/templates/coprs/detail/overview.html
+++ b/frontend/coprs_frontend/coprs/templates/coprs/detail/overview.html
@@ -159,6 +159,22 @@ <h3>Modified {{ name }}:</h3>
         </div>
       </div>
     {% endif %}
+
+    {% if copr.project_tags %}
+      <div class="panel panel-default">
+        <div class="panel-heading">
+          <h3 class="panel-title"> Tags </h3>
+        </div>
+        <div class="panel-body">
+          {% for tag in copr.project_tags %}
+          <a href="{{ url_for('coprs_ns.coprs_by_tag', tag_name=tag.name) }}"
+             class="btn btn-default btn-xs tag-btn" title="Projects tagged '{{ tag.name }}'">
+            {{ tag.name }}
+          </a>
+          {% endfor %}
+        </div>
+      </div>
+    {% endif %}
     <div class="panel panel-default">
       <div class="panel-heading">
         <h3 class="panel-title"> Last Build </h3>
diff --git a/frontend/coprs_frontend/coprs/templates/coprs/show/by_tag.html b/frontend/coprs_frontend/coprs/templates/coprs/show/by_tag.html
new file mode 100644
index 000000000..9afb10d59
--- /dev/null
+++ b/frontend/coprs_frontend/coprs/templates/coprs/show/by_tag.html
@@ -0,0 +1,16 @@
+{% extends "coprs/show.html" %}
+{% block title %}Projects tagged '{{ tag_name }}'{% endblock %}
+{% block header %}Projects tagged '{{ tag_name }}'{% endblock %}
+{% block breadcrumbs %}
+<ol class="breadcrumb">
+  <li>
+    <a href="{{ url_for('coprs_ns.coprs_show') }}">Home</a>
+  </li>
+  <li class="active">
+    Tag: {{ tag_name }}
+  </li>
+</ol>
+{% endblock %}
+{% block show_top %}
+<h1> Projects tagged <small>{{ tag_name }}</small></h1>
+{% endblock %}
diff --git a/frontend/coprs_frontend/coprs/views/admin_ns/admin_general.py b/frontend/coprs_frontend/coprs/views/admin_ns/admin_general.py
index 044f6bbeb..e8e7b1d9c 100644
--- a/frontend/coprs_frontend/coprs/views/admin_ns/admin_general.py
+++ b/frontend/coprs_frontend/coprs/views/admin_ns/admin_general.py
@@ -2,6 +2,7 @@
 import re
 
 import flask
+from sqlalchemy.exc import IntegrityError
 
 from copr_common.enums import RoleEnum
 from coprs import db
@@ -9,6 +10,7 @@
 from coprs import forms
 
 from coprs.logic import coprs_logic
+from coprs.logic.coprs_logic import ProjectTagsLogic
 
 from coprs.views.admin_ns import admin_ns
 from coprs.views.misc import login_required
@@ -51,6 +53,74 @@ def legal_flag_resolve(flag_id):
     return flask.redirect(flask.url_for("admin_ns.legal_flag"))
 
 
+@admin_ns.route("/tags/")
+@login_required(role=RoleEnum("admin"))
+def tags():
+    """
+    List the default (admin-curated) project tags for management.
+    """
+    return flask.render_template("admin/tags.html",
+                                 tags=ProjectTagsLogic.get_default_tags().all())
+
+
+@admin_ns.route("/tags/create/", methods=["POST"])
+@login_required(role=RoleEnum("admin"))
+def tag_create():
+    """
+    Create (or reuse) one or more tags by name and mark them as default.
+    """
+    names = forms.ProjectTagsFilter()(flask.request.form.get("name", ""))
+    if not names:
+        flask.flash("Please provide at least one valid tag name.", "error")
+    else:
+        for name in names:
+            tag = ProjectTagsLogic.create_tag(name, user=flask.g.user)
+            tag.is_default = True
+        db.session.commit()
+        flask.flash("Created default tag(s): {0}".format(", ".join(names)))
+    return flask.redirect(flask.url_for("admin_ns.tags"))
+
+
+@admin_ns.route("/tags/<int:tag_id>/rename/", methods=["POST"])
+@login_required(role=RoleEnum("admin"))
+def tag_rename(tag_id):
+    """
+    Rename an existing tag
+    """
+    tag = models.ProjectTag.query.get_or_404(tag_id)
+    new_name = forms.ProjectTagsFilter.normalize_tag_name(
+        flask.request.form.get("name", ""))
+
+    if not new_name or len(new_name) < 3:
+        flask.flash("Please provide a valid tag name (at least 3 characters).", "error")
+        return flask.redirect(flask.url_for("admin_ns.tags"))
+
+    old_name = tag.name
+    tag.name = new_name
+    try:
+        db.session.commit()
+    except IntegrityError:
+        db.session.rollback()
+        flask.flash(f"A tag named '{new_name}' already exists.", "error")
+    else:
+        flask.flash(f"Renamed tag '{old_name}' to '{new_name}'.")
+    return flask.redirect(flask.url_for("admin_ns.tags"))
+
+
+@admin_ns.route("/tags/<int:tag_id>/delete/", methods=["POST"])
+@login_required(role=RoleEnum("admin"))
+def tag_delete(tag_id):
+    """
+    Delete a tag, detaching it from every project that had it.
+    """
+    tag = models.ProjectTag.query.get_or_404(tag_id)
+    name = tag.name
+    ProjectTagsLogic.delete_tag(tag)
+    db.session.commit()
+    flask.flash(f"Deleted tag '{name}' and detached it from all projects.")
+    return flask.redirect(flask.url_for("admin_ns.tags"))
+
+
 @admin_ns.route("/playground/", methods=["POST", "GET"])
 @login_required(role=RoleEnum("admin"))
 def playground():
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/__init__.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/__init__.py
index 0391c1238..13cb548f6 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/__init__.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/__init__.py
@@ -246,7 +246,10 @@ def set_defaults(formdata, form_class):
             continue
         if field.name in formdata.keys():
             continue
-        formdata[field.name] = field.default
+        if isinstance(field.default, list):
+            formdata.setlist(field.name, field.default)
+        else:
+            formdata[field.name] = field.default
 
 
 def streamed_json_array_response(array_or_generator, message, field="data"):
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_projects.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_projects.py
index 0862dfe79..7b76ae140 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_projects.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/apiv3_projects.py
@@ -33,7 +33,7 @@
 )
 from coprs.views.apiv3_ns.schema.docs import query_docs
 from coprs.logic.actions_logic import ActionsLogic
-from coprs.logic.coprs_logic import CoprsLogic, CoprChrootsLogic, MockChrootsLogic
+from coprs.logic.coprs_logic import CoprsLogic, CoprChrootsLogic, MockChrootsLogic, ProjectTagsLogic
 from coprs.logic.complex_logic import ComplexLogic
 from coprs.logic.users_logic import UsersLogic
 from coprs.exceptions import (
@@ -82,6 +82,7 @@ def to_dict(copr):
         #  but we have this inconsistency between name - projectname
         "projectname": copr.name,
         "storage": StorageEnum(copr.storage),
+        "tags": [t.name for t in copr.project_tags],
     }
 
 
@@ -202,7 +203,7 @@ def post(self, ownername, exist_ok=False):
         """
         exist_ok = flask.request.args.get("exist_ok") == "True"
         user, group = owner2tuple(ownername)
-        data = rename_fields(get_form_compatible_data(preserve=["chroots"]))
+        data = rename_fields(get_form_compatible_data(preserve=["chroots", "tags"]))
         form_class = forms.CoprFormFactory.create_form_cls(user=user, group=group,
                                                            exist_ok=exist_ok)
         set_defaults(data, form_class)
@@ -267,6 +268,7 @@ def _form_field_repos(form_field):
                 repo_priority=form.repo_priority.data,
                 storage=form.storage.data,
             )
+            ProjectTagsLogic.set_copr_tags(copr, form.tags.data, user=user)
             db.session.commit()
         except IntegrityError as ierr:
             app.logger.debug("Racy attempt to create %s/%s", ownername, projectname)
@@ -294,7 +296,7 @@ class ProjectEdit(Resource):
     @staticmethod
     def _common(ownername, projectname):
         copr = get_copr(ownername, projectname)
-        data = rename_fields(get_form_compatible_data(preserve=["chroots"]))
+        data = rename_fields(get_form_compatible_data(preserve=["chroots", "tags"]))
         form = forms.CoprForm(data, meta={"csrf": False})
 
         if not form.validate_on_submit():
@@ -302,7 +304,7 @@ def _common(ownername, projectname):
         validate_chroots(get_input_dict(), MockChrootsLogic.get_multiple())
 
         for field in form:
-            if field.data is None or field.name in ["csrf_token", "chroots"]:
+            if field.data is None or field.name in ["csrf_token", "chroots", "tags", "default_tags"]:
                 continue
             if field.name not in data.keys():
                 continue
@@ -312,6 +314,8 @@ def _common(ownername, projectname):
             CoprChrootsLogic.update_from_names(flask.g.user, copr, form.chroots.data)
 
         try:
+            if "tags" in data:
+                ProjectTagsLogic.set_copr_tags(copr, form.tags.data, user=flask.g.user)
             CoprsLogic.update(flask.g.user, copr)
             if copr.group:  # load group.id
                 _ = copr.group.id
diff --git a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
index 39ea438b7..67e16fc60 100644
--- a/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
+++ b/frontend/coprs_frontend/coprs/views/apiv3_ns/schema/schemas.py
@@ -465,6 +465,11 @@ class _ProjectFields:
         ),
         example=["github.com/fedora-copr/copr", "github.com/another/project", "github.com/theproject/*"],
     )
+    tags: List = List(
+        String,
+        description="Project tags",
+        example=["cli", "devtools"],
+    )
     follow_fedora_branching: Boolean = Boolean(
         description=(
             "If chroots for the new branch should be auto-enabled and populated from "
diff --git a/frontend/coprs_frontend/coprs/views/coprs_ns/coprs_general.py b/frontend/coprs_frontend/coprs/views/coprs_ns/coprs_general.py
index 9144b0158..04cf017cd 100644
--- a/frontend/coprs_frontend/coprs/views/coprs_ns/coprs_general.py
+++ b/frontend/coprs_frontend/coprs/views/coprs_ns/coprs_general.py
@@ -26,7 +26,7 @@
 from coprs import helpers
 from coprs import models
 from coprs.exceptions import ObjectNotFound, BadRequest
-from coprs.logic.coprs_logic import CoprsLogic, PinnedCoprsLogic, MockChrootsLogic
+from coprs.logic.coprs_logic import CoprsLogic, PinnedCoprsLogic, MockChrootsLogic, ProjectTagsLogic
 from coprs.logic.stat_logic import CounterStatLogic
 from coprs.logic.webhooks_logic import WebhooksLogic
 from coprs.mail import send_mail, LegalFlagMessage, PermissionRequestMessage, PermissionChangeMessage
@@ -151,6 +151,28 @@ def coprs_by_user(username=None, page=1):
                                  graph=data)
 
 
+@coprs_ns.route("/tags/<tag_name>/", defaults={"page": 1})
+@coprs_ns.route("/tags/<tag_name>/<int:page>/")
+def coprs_by_tag(tag_name, page=1):
+    """
+    List the (paginated) projects tagged with an exact tag name.
+    """
+    query = CoprsLogic.get_copr_projects_by_tag_name(tag_name)
+    query = CoprsLogic.set_query_order(query, desc=True)
+    paginator = helpers.Paginator(query, query.count(), page)
+    coprs = paginator.sliced_query
+
+    data = builds_logic.BuildsLogic.get_small_graph_data('30min')
+
+    return flask.render_template("coprs/show/by_tag.html",
+                                 tag_name=tag_name,
+                                 coprs=coprs,
+                                 pinned=[],
+                                 paginator=paginator,
+                                 tasks_info=ComplexLogic.get_queue_sizes_cached(),
+                                 graph=data)
+
+
 @coprs_ns.route("/fulltext/", defaults={"page": 1})
 @coprs_ns.route("/fulltext/<int:page>/")
 def coprs_fulltext_search(page=1):
@@ -339,10 +361,14 @@ def copr_new(username=None, group_name=None):
                 repo_priority=form.repo_priority.data
             )
 
+            ProjectTagsLogic.set_copr_tags(
+                copr, form.default_tags.data + form.tags.data, user=flask.g.user)
+
             db.session.commit()
             after_the_project_creation(copr, form)
             return flask.redirect(url_for_copr_details(copr))
-        except (exceptions.DuplicateException, exceptions.NonAdminCannotCreatePersistentProject) as e:
+        except (exceptions.DuplicateException, exceptions.NonAdminCannotCreatePersistentProject,
+                exceptions.BadRequest) as e:
             flask.flash(str(e), "error")
 
     return flask.render_template(redirect, form=form, group=group)
@@ -621,11 +647,14 @@ def process_copr_update(copr, form):
     try:
         coprs_logic.CoprChrootsLogic.update_from_names(
             flask.g.user, copr, form.selected_chroots)
+        ProjectTagsLogic.set_copr_tags(
+            copr, form.default_tags.data + form.tags.data, user=flask.g.user)
         # form validation checks for duplicates
         coprs_logic.CoprsLogic.update(flask.g.user, copr)
     except (exceptions.ActionInProgressException,
             exceptions.InsufficientRightsException,
-            exceptions.ConflictingRequest) as e:
+            exceptions.ConflictingRequest,
+            exceptions.BadRequest) as e:
 
         flask.flash(str(e), "error")
         db.session.rollback()
diff --git a/frontend/coprs_frontend/tests/test_apiv3/test_projects.py b/frontend/coprs_frontend/tests/test_apiv3/test_projects.py
index 4d04dfb26..af8683d45 100644
--- a/frontend/coprs_frontend/tests/test_apiv3/test_projects.py
+++ b/frontend/coprs_frontend/tests/test_apiv3/test_projects.py
@@ -4,6 +4,7 @@
 from unittest.mock import patch, MagicMock
 
 import pytest
+from sqlalchemy import inspect as sa_inspect
 
 from coprs.models import User, Copr
 
@@ -75,10 +76,54 @@ def test_isolation_config(self, store, read):
         self.api3.post(route, data)
         assert Copr.query.one().isolation == read
 
+    @TransactionDecorator("u1")
+    @pytest.mark.usefixtures("f_users", "f_users_api", "f_mock_chroots", "f_db")
+    def test_add_project_with_tags(self):
+        """
+        Test that tags are added correctly when adding a project.
+        """
+        route = "/api_3/project/add/{}".format(self.transaction_username)
+        resp = self.api3.post(route, {
+            "name": "test-tags",
+            "chroots": ["fedora-rawhide-i386"],
+            "tags": ["cli", "monitoring", "devtools"],
+        })
+        assert resp.status_code == 200
+        assert sorted(resp.json["tags"]) == ["cli", "devtools", "monitoring"]
+        copr = Copr.query.filter_by(name="test-tags").one()
+        assert sorted(t.name for t in copr.project_tags) == \
+            ["cli", "devtools", "monitoring"]
+
+    @TransactionDecorator("u1")
+    @pytest.mark.usefixtures("f_users", "f_users_api", "f_mock_chroots", "f_db")
+    def test_edit_project_tags_is_partial_update(self):
+        """
+        Editing a project without mentioning tags must leave existing tags untouched.
+        """
+        route = "/api_3/project/add/{}".format(self.transaction_username)
+        self.api3.post(route, {
+            "name": "test-tags-edit",
+            "chroots": ["fedora-rawhide-i386"],
+            "tags": ["cli"],
+        })
+
+        # editing without mentioning tags must leave the existing tag alone
+        self.api3.modify_project("test-tags-edit", description="new desc")
+        copr = Copr.query.filter_by(name="test-tags-edit").one()
+        assert [t.name for t in copr.project_tags] == ["cli"]
+
+        # editing with tags replaces the previous set entirely
+        self.api3.modify_project("test-tags-edit", tags=["devtools", "review-tool"])
+        self.db.session.expire(copr)
+        assert sorted(t.name for t in copr.project_tags) == \
+            ["devtools", "review-tool"]
+
     def _get_copr_id_data(self, copr_id):
         copr = self.db.session.get(self.models.Copr, copr_id)
-        data = copy.deepcopy(copr.__dict__)
-        data.pop("_sa_instance_state")
+        # only compare columns attrs, not relationships
+        column_attrs = {attr.key for attr in sa_inspect(copr).mapper.column_attrs}
+        data = {k: copy.deepcopy(v) for k, v in copr.__dict__.items()
+                if k in column_attrs}
         data.pop("latest_indexed_data_update")
         return data
 
diff --git a/frontend/coprs_frontend/tests/test_forms.py b/frontend/coprs_frontend/tests/test_forms.py
index 8c66f8c53..bfd247004 100644
--- a/frontend/coprs_frontend/tests/test_forms.py
+++ b/frontend/coprs_frontend/tests/test_forms.py
@@ -3,6 +3,7 @@
 import pytest
 import wtforms
 import flask
+from werkzeug.datastructures import MultiDict
 from tests.coprs_test_case import CoprsTestCase
 from coprs import app
 from coprs.forms import (
@@ -10,6 +11,7 @@
     CoprFormFactory,
     CreateModuleForm,
     RpmValidator,
+    ProjectTagsFilter,
     REGEX_BOOTSTRAP_IMAGE,
     REGEX_CHROOT_DENYLIST,
 )
@@ -26,6 +28,78 @@ def test_empty_chroots(self):
             assert "At least one chroot" in form.errors[None][0]
 
 
+class TestProjectTagsFilter:
+    def test_basic_comma_split(self):
+        """
+        Comma-separated tag names are split into a list.
+        """
+        assert ProjectTagsFilter()("cli, devtools") == ["cli", "devtools"]
+
+    def test_ascii_drops_unicode_no_transliterate(self):
+        """
+        Non-ASCII characters are dropped outright rather than transliterated.
+        """
+        assert ProjectTagsFilter()("café") == ["caf"]
+
+    def test_minimum_length_three(self):
+        """
+        Tag names shorter than 3 characters are silently dropped.
+        """
+        assert ProjectTagsFilter()("cli, ab, xyz") == ["cli", "xyz"]
+
+    def test_dedup_preserves_order(self):
+        """
+        Duplicate tag names are removed while preserving first-seen order.
+        """
+        assert ProjectTagsFilter()("cli, devtools, cli") == ["cli", "devtools"]
+
+    def test_empty_value(self):
+        """
+        Empty or missing input produces an empty list rather than erroring.
+        """
+        assert not ProjectTagsFilter()("")
+        assert not ProjectTagsFilter()(None)
+
+
+class TestAdditionalProjectTagsField(CoprsTestCase):
+    """
+    Regression tests for the AdditionalProjectTagsField.process_formdata()
+    fix: the API's `tags` input is preserved as a real list (unlike the web
+    form's single comma-separated string), so the field has to reconcile
+    both shapes into one before ProjectTagsFilter runs.
+    """
+
+    @pytest.mark.usefixtures("f_users", "f_db")
+    def test_multiple_formdata_values_all_preserved(self):
+        """
+        Repeated `tags` form values (the API's list shape) are all joined into one comma-separated string.
+        """
+        with app.test_request_context():
+            flask.g.user = self.u2
+            formdata = MultiDict([
+                ("name", "foo"),
+                ("tags", "cli"),
+                ("tags", "monitoring"),
+                ("tags", "devtools"),
+            ])
+            form = CoprFormFactory.create_form_cls()(formdata, meta={"csrf": False})
+            assert form.tags.data == ["cli", "monitoring", "devtools"]
+
+    @pytest.mark.usefixtures("f_users", "f_db")
+    def test_single_comma_string_still_works(self):
+        """
+        A single comma-separated `tags` value (the web form's shape) is still handled correctly.
+        """
+        with app.test_request_context():
+            flask.g.user = self.u2
+            formdata = MultiDict([
+                ("name", "foo"),
+                ("tags", "cli, monitoring, devtools"),
+            ])
+            form = CoprFormFactory.create_form_cls()(formdata, meta={"csrf": False})
+            assert form.tags.data == ["cli", "monitoring", "devtools"]
+
+
 class TestPinnedCoprsForm(CoprsTestCase):
 
     @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
diff --git a/frontend/coprs_frontend/tests/test_logic/test_coprs_logic.py b/frontend/coprs_frontend/tests/test_logic/test_coprs_logic.py
index b2f23659f..65bf5cf70 100644
--- a/frontend/coprs_frontend/tests/test_logic/test_coprs_logic.py
+++ b/frontend/coprs_frontend/tests/test_logic/test_coprs_logic.py
@@ -12,7 +12,8 @@
 from coprs.forms import PinnedCoprsForm, ChrootForm, ModuleEnableNameValidator
 from coprs.logic.actions_logic import ActionsLogic
 from coprs.logic.coprs_logic import (CoprsLogic, CoprChrootsLogic,
-                                     PinnedCoprsLogic, CoprScoreLogic)
+                                     PinnedCoprsLogic, CoprScoreLogic,
+                                     ProjectTagsLogic)
 from coprs.logic.users_logic import UsersLogic
 from coprs.logic.complex_logic import ComplexLogic
 
@@ -23,6 +24,7 @@
     AccessRestricted,
     ConflictingRequest,
     InsufficientRightsException,
+    BadRequest,
 )
 
 
@@ -495,3 +497,98 @@ def test_search_by_attributes(self):
             packagename="world",
         )
         assert set(result) == {self.c2}
+
+
+class TestProjectTagsLogic(CoprsTestCase):
+    """
+    Tests for ProjectTagsLogic.
+    """
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_create_tag_is_get_or_create(self):
+        """
+        Creating a tag with a name that already exists reuses the original row and creator.
+        """
+        tag1 = ProjectTagsLogic.create_tag("cli", user=self.u1)
+        self.db.session.commit()
+        tag2 = ProjectTagsLogic.create_tag("cli", user=self.u2)
+        assert tag1.id == tag2.id
+        # the original creator is preserved, not overwritten by reuse
+        assert tag2.user == self.u1
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_get_default_tags_filters_and_orders(self):
+        """
+        get_default_tags() returns only is_default tags, alphabetically ordered.
+        """
+        self.db.session.add_all([
+            self.models.ProjectTag(name="zeta", is_default=True),
+            self.models.ProjectTag(name="acme", is_default=True),
+            self.models.ProjectTag(name="custom", is_default=False),
+        ])
+        self.db.session.commit()
+        names = [t.name for t in ProjectTagsLogic.get_default_tags()]
+        assert names == ["acme", "zeta"]
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_set_copr_tags_caps_at_ten(self):
+        """
+        Assigning more than 10 tags to a project raises BadRequest.
+        """
+        names = [f"tag{i}" for i in range(11)]
+        with pytest.raises(BadRequest):
+            ProjectTagsLogic.set_copr_tags(self.c1, names, user=self.u1)
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_set_copr_tags_dedups(self):
+        """
+        Duplicate tag names in the input are collapsed to one tag.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli", "cli", "devtools"], user=self.u1)
+        self.db.session.commit()
+        assert sorted(t.name for t in self.c1.project_tags) == ["cli", "devtools"]
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_reuses_existing_tag_across_projects(self):
+        """
+        Two projects tagging the same name share the same underlying ProjectTag row.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli"], user=self.u1)
+        self.db.session.commit()
+        ProjectTagsLogic.set_copr_tags(self.c2, ["cli"], user=self.u2)
+        self.db.session.commit()
+        assert self.c1.project_tags[0].id == self.c2.project_tags[0].id
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_reedit_with_overlap_does_not_raise(self):
+        """
+        Regression test: re-editing with an overlapping tag no
+        longer raises a UniqueViolation.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli", "devtools"], user=self.u1)
+        self.db.session.commit()
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli", "monitoring"], user=self.u1)
+        self.db.session.commit()
+        assert sorted(t.name for t in self.c1.project_tags) == ["cli", "monitoring"]
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_set_copr_tags_removes_all_when_empty(self):
+        """
+        Passing an empty tag list clears every tag from the project.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli", "devtools"], user=self.u1)
+        self.db.session.commit()
+        ProjectTagsLogic.set_copr_tags(self.c1, [], user=self.u1)
+        self.db.session.commit()
+        assert not list(self.c1.project_tags)
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_get_multiple_by_tag_exact_match_only(self):
+        """
+        Matches the exact tag name only, not similar-looking ones.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["cli"], user=self.u1)
+        ProjectTagsLogic.set_copr_tags(self.c3, ["cli-tool"], user=self.u2)
+        self.db.session.commit()
+        results = CoprsLogic.get_copr_projects_by_tag_name("cli").all()
+        assert [c.id for c in results] == [self.c1.id]
diff --git a/frontend/coprs_frontend/tests/test_views/test_admin/test_admin_general.py b/frontend/coprs_frontend/tests/test_views/test_admin/test_admin_general.py
index ca6cc5408..74ef416be 100644
--- a/frontend/coprs_frontend/tests/test_views/test_admin/test_admin_general.py
+++ b/frontend/coprs_frontend/tests/test_views/test_admin/test_admin_general.py
@@ -1,3 +1,4 @@
+# pylint: disable=unused-argument
 from tests.coprs_test_case import CoprsTestCase
 
 
@@ -21,3 +22,62 @@ def test_admin_can_login(self, f_users, f_db):
 
         r = c.get("/admin/", follow_redirects=True)
         assert self.text_to_check in r.data.decode("utf-8")
+
+
+class TestAdminTags(CoprsTestCase):
+    """
+    Tests for the admin tag management routes
+    """
+
+    def _login_as_admin(self, c):
+        """
+        Log the test client in as the admin user.
+        """
+        with c.session_transaction() as s:
+            s["oidc"] = self.u1.username
+
+    def test_create_tag_marks_default(self, f_users, f_db):
+        """
+        Creating a tag via the admin route marks it as default immediately.
+        """
+        with self.tc as c:
+            self._login_as_admin(c)
+            c.post("/admin/tags/create/", data={"name": "cli"},
+                   follow_redirects=True)
+
+        tag = self.models.ProjectTag.query.filter_by(name="cli").first()
+        assert tag is not None
+        assert tag.is_default is True
+
+    def test_rename_tag(self, f_users, f_db):
+        """
+        Renaming a tag updates its name in place.
+        """
+        tag = self.models.ProjectTag(name="cli", is_default=False, created_on=1)
+        self.db.session.add(tag)
+        self.db.session.commit()
+
+        with self.tc as c:
+            self._login_as_admin(c)
+            c.post(f"/admin/tags/{tag.id}/rename/",
+                   data={"name": "cli-tool"}, follow_redirects=True)
+
+        self.db.session.expire(tag)
+        assert tag.name == "cli-tool"
+
+    def test_rename_whole_input_as_one_name(self, f_users, f_db):
+        """
+        Regression test: a comma in the rename input must not silently drop
+        part of the name (it isn't the multi-tag Create field).
+        """
+        tag = self.models.ProjectTag(name="cli", is_default=False, created_on=1)
+        self.db.session.add(tag)
+        self.db.session.commit()
+
+        with self.tc as c:
+            self._login_as_admin(c)
+            c.post(f"/admin/tags/{tag.id}/rename/",
+                   data={"name": "hello, hi"}, follow_redirects=True)
+
+        self.db.session.expire(tag)
+        assert tag.name == "hello-hi"
diff --git a/frontend/coprs_frontend/tests/test_views/test_coprs_ns/test_coprs_general.py b/frontend/coprs_frontend/tests/test_views/test_coprs_ns/test_coprs_general.py
index 81f394c75..79591f611 100644
--- a/frontend/coprs_frontend/tests/test_views/test_coprs_ns/test_coprs_general.py
+++ b/frontend/coprs_frontend/tests/test_views/test_coprs_ns/test_coprs_general.py
@@ -19,7 +19,7 @@
 from coprs import app, cache, models
 
 from coprs.repos import generate_repo_name
-from coprs.logic.coprs_logic import CoprsLogic, CoprDirsLogic
+from coprs.logic.coprs_logic import CoprsLogic, CoprDirsLogic, ProjectTagsLogic
 from coprs.logic.actions_logic import ActionsLogic
 
 from commands.create_chroot import create_chroot_function
@@ -1209,3 +1209,23 @@ def test_fedora_review_project(self):
         assert resp.status_code == 200  # error!
         error = parse_web_form_error(resp.data, variant="b")
         assert error == "Error in project config"
+
+
+class TestCoprsByTag(CoprsTestCase):
+    """
+    Tests for the /coprs/tags/<tag_name>/ browse-by-tag route.
+    """
+
+    @pytest.mark.usefixtures("f_users", "f_coprs", "f_db")
+    def test_by_tag_route_exact_match_only(self):
+        """
+        The route must do an exact tag-name join filter, not a broad fulltext search.
+        """
+        ProjectTagsLogic.set_copr_tags(self.c1, ["devtools"], user=self.u1)
+        self.db.session.commit()
+
+        r = self.tc.get("/coprs/tags/devtools/")
+        assert r.status_code == 200
+        content = r.data.decode("utf-8")
+        assert "foocopr" in content
+        assert "barcopr" not in content
diff --git a/frontend/requirements.txt b/frontend/requirements.txt
index 84bc11465..2892ab0fd 100644
--- a/frontend/requirements.txt
+++ b/frontend/requirements.txt
@@ -13,6 +13,7 @@ markupsafe
 pyLibravatar
 pydns # pyLibravatar uses this
 python-dateutil
+python-slugify
 netaddr
 alembic
 redis
diff --git a/python/copr/v3/proxies/project.py b/python/copr/v3/proxies/project.py
index 1c7c2bd7b..b426af4cd 100644
--- a/python/copr/v3/proxies/project.py
+++ b/python/copr/v3/proxies/project.py
@@ -72,7 +72,7 @@ def add(self, ownername, projectname, chroots, description=None, instructions=No
             delete_after_days=None, multilib=False, module_hotfixes=False,
             bootstrap=None, bootstrap_image=None, isolation=None, follow_fedora_branching=True,
             fedora_review=None, appstream=False, runtime_dependencies=None, packit_forge_projects_allowed=None,
-            repo_priority=None, exist_ok=False, storage=None):
+            repo_priority=None, exist_ok=False, storage=None, tags=None):
         """
         Create a project
 
@@ -111,6 +111,7 @@ def add(self, ownername, projectname, chroots, description=None, instructions=No
         :param list packit_forge_projects_allowed: List of forge projects that
             will be allowed to build in the project via Packit
         :param str storage: Admin only - What storage should be used for this project
+        :param list tags: List of tags to attach to the project
         :return: Munch
         """
         endpoint = "/project/add/{ownername}"
@@ -144,6 +145,7 @@ def add(self, ownername, projectname, chroots, description=None, instructions=No
             "packit_forge_projects_allowed": packit_forge_projects_allowed,
             "repo_priority": repo_priority,
             "storage": storage,
+            "tags": tags,
         }
 
         _compat_use_bootstrap_container(data, use_bootstrap_container)
@@ -163,7 +165,7 @@ def edit(self, ownername, projectname, chroots=None, description=None, instructi
              delete_after_days=None, multilib=None, module_hotfixes=None,
              bootstrap=None, bootstrap_image=None, isolation=None, follow_fedora_branching=None,
              fedora_review=None, appstream=None, runtime_dependencies=None, packit_forge_projects_allowed=None,
-             repo_priority=None):
+             repo_priority=None, tags=None):
         """
         Edit a project
 
@@ -200,6 +202,7 @@ def edit(self, ownername, projectname, chroots=None, description=None, instructi
             enabled together with this project repository.
         :param list packit_forge_projects_allowed: List of forge projects that
             will be allowed to build in the project via Packit
+        :param list tags: List of tags to attach to the project
         :return: Munch
         """
         endpoint = "/project/edit/{ownername}/{projectname}"
@@ -230,6 +233,7 @@ def edit(self, ownername, projectname, chroots=None, description=None, instructi
             "runtime_dependencies": runtime_dependencies,
             "packit_forge_projects_allowed": packit_forge_projects_allowed,
             "repo_priority": repo_priority,
+            "tags": tags,
         }
 
         _compat_use_bootstrap_container(data, use_bootstrap_container)