diff --git a/lib/api/api.dart b/lib/api/api.dart
index 2bee4105..0e5c80db 100644
--- a/lib/api/api.dart
+++ b/lib/api/api.dart
@@ -33,6 +33,7 @@ class Api {
 
   _Files files() => _Files(this);
   _Ocs ocs() => _Ocs(this);
+  _SystemtagsRelations systemtagsRelations() => _SystemtagsRelations(this);
 
   static String getAuthorizationHeaderValue(Account account) {
     final auth =
@@ -716,3 +717,82 @@ class _OcsFilesSharingSharees {
 
   static final _log = Logger("api.api._OcsFilesSharingSharees");
 }
+
+class _SystemtagsRelations {
+  const _SystemtagsRelations(this.api);
+
+  _SystemtagsRelationsFiles files(int fileId) =>
+      _SystemtagsRelationsFiles(this, fileId);
+
+  final Api api;
+}
+
+class _SystemtagsRelationsFiles {
+  const _SystemtagsRelationsFiles(this.systemtagsRelations, this.fileId);
+
+  /// List systemtags associated with a file
+  ///
+  /// Warning: this Nextcloud API is undocumented
+  Future<Response> propfind({
+    id,
+    displayName,
+    userVisible,
+    userAssignable,
+    canAssign,
+  }) async {
+    final endpoint = "remote.php/dav/systemtags-relations/files/$fileId";
+    try {
+      if (id == null &&
+          displayName == null &&
+          userVisible == null &&
+          userAssignable == null &&
+          canAssign == null) {
+        // no body
+        return await systemtagsRelations.api.request("PROPFIND", endpoint);
+      }
+
+      final namespaces = <String, String>{
+        "DAV:": "d",
+        "http://owncloud.org/ns": "oc",
+      };
+      final builder = XmlBuilder();
+      builder
+        ..processing("xml", "version=\"1.0\"")
+        ..element("d:propfind", namespaces: namespaces, nest: () {
+          builder.element("d:prop", nest: () {
+            if (id != null) {
+              builder.element("oc:id");
+            }
+            if (displayName != null) {
+              builder.element("oc:display-name");
+            }
+            if (userVisible != null) {
+              builder.element("oc:user-visible");
+            }
+            if (userAssignable != null) {
+              builder.element("oc:user-assignable");
+            }
+            if (canAssign != null) {
+              builder.element("oc:can-assign");
+            }
+          });
+        });
+      return await systemtagsRelations.api.request(
+        "PROPFIND",
+        endpoint,
+        header: {
+          "Content-Type": "application/xml",
+        },
+        body: builder.buildDocument().toXmlString(),
+      );
+    } catch (e) {
+      _log.severe("[propfind] Failed while propfind", e);
+      rethrow;
+    }
+  }
+
+  final _SystemtagsRelations systemtagsRelations;
+  final int fileId;
+
+  static final _log = Logger("api.api._SystemtagsRelationsFiles");
+}
diff --git a/lib/di_container.dart b/lib/di_container.dart
index c8d568a0..743deb86 100644
--- a/lib/di_container.dart
+++ b/lib/di_container.dart
@@ -6,6 +6,7 @@ import 'package:nc_photos/entity/file.dart';
 import 'package:nc_photos/entity/person.dart';
 import 'package:nc_photos/entity/share.dart';
 import 'package:nc_photos/entity/sharee.dart';
+import 'package:nc_photos/entity/tag.dart';
 import 'package:nc_photos/or_null.dart';
 import 'package:nc_photos/pref.dart';
 
@@ -17,6 +18,7 @@ enum DiType {
   shareRepo,
   shareeRepo,
   favoriteRepo,
+  tagRepo,
   appDb,
   pref,
 }
@@ -30,6 +32,7 @@ class DiContainer {
     ShareRepo? shareRepo,
     ShareeRepo? shareeRepo,
     FavoriteRepo? favoriteRepo,
+    TagRepo? tagRepo,
     AppDb? appDb,
     Pref? pref,
   })  : _albumRepo = albumRepo,
@@ -39,6 +42,7 @@ class DiContainer {
         _shareRepo = shareRepo,
         _shareeRepo = shareeRepo,
         _favoriteRepo = favoriteRepo,
+        _tagRepo = tagRepo,
         _appDb = appDb,
         _pref = pref;
 
@@ -58,6 +62,8 @@ class DiContainer {
         return contianer._shareeRepo != null;
       case DiType.favoriteRepo:
         return contianer._favoriteRepo != null;
+      case DiType.tagRepo:
+        return contianer._tagRepo != null;
       case DiType.appDb:
         return contianer._appDb != null;
       case DiType.pref:
@@ -73,6 +79,7 @@ class DiContainer {
     OrNull<ShareRepo>? shareRepo,
     OrNull<ShareeRepo>? shareeRepo,
     OrNull<FavoriteRepo>? favoriteRepo,
+    OrNull<TagRepo>? tagRepo,
     OrNull<AppDb>? appDb,
     OrNull<Pref>? pref,
   }) {
@@ -84,6 +91,7 @@ class DiContainer {
       shareRepo: shareRepo == null ? _shareRepo : shareRepo.obj,
       shareeRepo: shareeRepo == null ? _shareeRepo : shareeRepo.obj,
       favoriteRepo: favoriteRepo == null ? _favoriteRepo : favoriteRepo.obj,
+      tagRepo: tagRepo == null ? _tagRepo : tagRepo.obj,
       appDb: appDb == null ? _appDb : appDb.obj,
       pref: pref == null ? _pref : pref.obj,
     );
@@ -96,6 +104,7 @@ class DiContainer {
   ShareRepo get shareRepo => _shareRepo!;
   ShareeRepo get shareeRepo => _shareeRepo!;
   FavoriteRepo get favoriteRepo => _favoriteRepo!;
+  TagRepo get tagRepo => _tagRepo!;
 
   AppDb get appDb => _appDb!;
   Pref get pref => _pref!;
@@ -107,6 +116,7 @@ class DiContainer {
   final ShareRepo? _shareRepo;
   final ShareeRepo? _shareeRepo;
   final FavoriteRepo? _favoriteRepo;
+  final TagRepo? _tagRepo;
 
   final AppDb? _appDb;
   final Pref? _pref;
diff --git a/lib/entity/tag.dart b/lib/entity/tag.dart
new file mode 100644
index 00000000..bf9de649
--- /dev/null
+++ b/lib/entity/tag.dart
@@ -0,0 +1,107 @@
+import 'package:equatable/equatable.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/json_util.dart' as json_util;
+import 'package:nc_photos/or_null.dart';
+import 'package:nc_photos/type.dart';
+
+class Tag with EquatableMixin {
+  const Tag({
+    required this.id,
+    required this.displayName,
+    this.userVisible,
+    this.userAssignable,
+    this.canAssign,
+  });
+
+  factory Tag.fromJson(JsonObj json) => Tag(
+        id: json["id"],
+        displayName: json["displayName"],
+        userVisible: json_util.boolFromJson(json["userVisible"]),
+        userAssignable: json_util.boolFromJson(json["userAssignable"]),
+        canAssign: json_util.boolFromJson(json["canAssign"]),
+      );
+
+  JsonObj toJson() => {
+        "id": id,
+        "displayName": displayName,
+        if (userVisible != null) "userVisible": userVisible,
+        if (userAssignable != null) "userAssignable": userAssignable,
+        if (canAssign != null) "canAssign": canAssign,
+      };
+
+  @override
+  toString() {
+    final buffer = StringBuffer();
+    buffer.write("$runtimeType {"
+        "id: $id, "
+        "displayName: '$displayName', ");
+    if (userVisible != null) {
+      buffer.write("userVisible: $userVisible, ");
+    }
+    if (userAssignable != null) {
+      buffer.write("userAssignable: $userAssignable, ");
+    }
+    if (canAssign != null) {
+      buffer.write("canAssign: $canAssign, ");
+    }
+    buffer.write("}");
+    return buffer.toString();
+  }
+
+  Tag copyWith({
+    int? id,
+    String? displayName,
+    OrNull<bool>? userVisible,
+    OrNull<bool>? userAssignable,
+    OrNull<bool>? canAssign,
+  }) =>
+      Tag(
+        id: id ?? this.id,
+        displayName: displayName ?? this.displayName,
+        userVisible: userVisible == null ? this.userVisible : userVisible.obj,
+        userAssignable:
+            userAssignable == null ? this.userAssignable : userAssignable.obj,
+        canAssign: canAssign == null ? this.canAssign : canAssign.obj,
+      );
+
+  @override
+  get props => [
+        id,
+        displayName,
+        userVisible,
+        userAssignable,
+        canAssign,
+      ];
+
+  final int id;
+  final String displayName;
+  final bool? userVisible;
+  final bool? userAssignable;
+  final bool? canAssign;
+}
+
+extension TagExtension on Tag {
+  /// Compare the server identity of two Tags
+  ///
+  /// Return true if two Tags point to the same tag on server. Be careful that
+  /// this does NOT mean that the two Tags are identical
+  bool compareServerIdentity(Tag other) {
+    return id == other.id && displayName == other.displayName;
+  }
+}
+
+class TagRepo {
+  const TagRepo(this.dataSrc);
+
+  /// See [TagDataSource.listByFile]
+  Future<List<Tag>> listByFile(Account account, File file) =>
+      dataSrc.listByFile(account, file);
+
+  final TagDataSource dataSrc;
+}
+
+abstract class TagDataSource {
+  /// List all tags associated with [file]
+  Future<List<Tag>> listByFile(Account account, File file);
+}
diff --git a/lib/entity/tag/data_source.dart b/lib/entity/tag/data_source.dart
new file mode 100644
index 00000000..e975f068
--- /dev/null
+++ b/lib/entity/tag/data_source.dart
@@ -0,0 +1,36 @@
+import 'package:logging/logging.dart';
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/api/api.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/tag.dart';
+import 'package:nc_photos/entity/webdav_response_parser.dart';
+import 'package:nc_photos/exception.dart';
+import 'package:xml/xml.dart';
+
+class TagRemoteDataSource implements TagDataSource {
+  const TagRemoteDataSource();
+
+  @override
+  listByFile(Account account, File file) async {
+    _log.info("[listByFile] ${file.path}");
+    final response =
+        await Api(account).systemtagsRelations().files(file.fileId!).propfind(
+              id: 1,
+              displayName: 1,
+              userVisible: 1,
+              userAssignable: 1,
+              canAssign: 1,
+            );
+    if (!response.isGood) {
+      _log.severe("[listByFile] Failed requesting server: $response");
+      throw ApiException(
+          response: response,
+          message: "Failed communicating with server: ${response.statusCode}");
+    }
+
+    final xml = XmlDocument.parse(response.body);
+    return WebdavResponseParser().parseTags(xml);
+  }
+
+  static final _log = Logger("entity.tag.data_source.TagRemoteDataSource");
+}
diff --git a/lib/entity/webdav_response_parser.dart b/lib/entity/webdav_response_parser.dart
index 1a597651..ea605a27 100644
--- a/lib/entity/webdav_response_parser.dart
+++ b/lib/entity/webdav_response_parser.dart
@@ -5,6 +5,7 @@ import 'package:logging/logging.dart';
 import 'package:nc_photos/ci_string.dart';
 import 'package:nc_photos/entity/favorite.dart';
 import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/tag.dart';
 import 'package:nc_photos/string_extension.dart';
 import 'package:xml/xml.dart';
 
@@ -14,9 +15,11 @@ class WebdavResponseParser {
   List<Favorite> parseFavorites(XmlDocument xml) =>
       _parse<Favorite>(xml, _toFavorite);
 
+  List<Tag> parseTags(XmlDocument xml) => _parse<Tag>(xml, _toTag);
+
   Map<String, String> get namespaces => _namespaces;
 
-  List<T> _parse<T>(XmlDocument xml, T Function(XmlElement) mapper) {
+  List<T> _parse<T>(XmlDocument xml, T? Function(XmlElement) mapper) {
     _namespaces = _parseNamespaces(xml);
     final body = () {
       try {
@@ -174,6 +177,56 @@ class WebdavResponseParser {
     );
   }
 
+  /// Map <DAV:response> contents to Tag
+  Tag? _toTag(XmlElement element) {
+    String? path;
+    int? id;
+    String? displayName;
+    bool? userVisible;
+    bool? userAssignable;
+    bool? canAssign;
+
+    for (final child in element.children.whereType<XmlElement>()) {
+      if (child.matchQualifiedName("href",
+          prefix: "DAV:", namespaces: _namespaces)) {
+        path = _hrefToPath(child);
+      } else if (child.matchQualifiedName("propstat",
+          prefix: "DAV:", namespaces: _namespaces)) {
+        final status = child.children
+            .whereType<XmlElement>()
+            .firstWhere((element) => element.matchQualifiedName("status",
+                prefix: "DAV:", namespaces: _namespaces))
+            .innerText;
+        if (!status.contains(" 200 ")) {
+          continue;
+        }
+        final prop = child.children.whereType<XmlElement>().firstWhere(
+            (element) => element.matchQualifiedName("prop",
+                prefix: "DAV:", namespaces: _namespaces));
+        final propParser =
+            _TagPropParser(namespaces: _namespaces, logFilePath: path);
+        propParser.parse(prop);
+        id = propParser.id;
+        displayName = propParser.displayName;
+        userVisible = propParser.userVisible;
+        userAssignable = propParser.userAssignable;
+        canAssign = propParser.canAssign;
+      }
+    }
+    if (id == null) {
+      // the first returned item is not a valid tag
+      return null;
+    }
+
+    return Tag(
+      id: id,
+      displayName: displayName!,
+      userVisible: userVisible!,
+      userAssignable: userAssignable!,
+      canAssign: canAssign!,
+    );
+  }
+
   String _hrefToPath(XmlElement href) {
     final rawPath = Uri.decodeComponent(href.innerText).trimLeftAny("/");
     final pos = rawPath.indexOf("remote.php");
@@ -336,6 +389,52 @@ class _FileIdPropParser {
   int? _fileId;
 }
 
+class _TagPropParser {
+  _TagPropParser({
+    this.namespaces = const {},
+    this.logFilePath,
+  });
+
+  /// Parse <DAV:prop> element contents
+  void parse(XmlElement element) {
+    for (final child in element.children.whereType<XmlElement>()) {
+      if (child.matchQualifiedName("id",
+          prefix: "http://owncloud.org/ns", namespaces: namespaces)) {
+        _id = int.parse(child.innerText);
+      } else if (child.matchQualifiedName("display-name",
+          prefix: "http://owncloud.org/ns", namespaces: namespaces)) {
+        _displayName = child.innerText;
+      } else if (child.matchQualifiedName("user-visible",
+          prefix: "http://owncloud.org/ns", namespaces: namespaces)) {
+        _userVisible = child.innerText == "true";
+      } else if (child.matchQualifiedName("user-assignable",
+          prefix: "http://owncloud.org/ns", namespaces: namespaces)) {
+        _userAssignable = child.innerText == "true";
+      } else if (child.matchQualifiedName("can-assign",
+          prefix: "http://owncloud.org/ns", namespaces: namespaces)) {
+        _canAssign = child.innerText == "true";
+      }
+    }
+  }
+
+  int? get id => _id;
+  String? get displayName => _displayName;
+  bool? get userVisible => _userVisible;
+  bool? get userAssignable => _userAssignable;
+  bool? get canAssign => _canAssign;
+
+  final Map<String, String> namespaces;
+
+  /// File path for logging only
+  final String? logFilePath;
+
+  int? _id;
+  String? _displayName;
+  bool? _userVisible;
+  bool? _userAssignable;
+  bool? _canAssign;
+}
+
 extension on XmlElement {
   bool matchQualifiedName(
     String local, {
diff --git a/lib/main.dart b/lib/main.dart
index 7a163390..98d10f7d 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -23,6 +23,8 @@ import 'package:nc_photos/entity/share.dart';
 import 'package:nc_photos/entity/share/data_source.dart';
 import 'package:nc_photos/entity/sharee.dart';
 import 'package:nc_photos/entity/sharee/data_source.dart';
+import 'package:nc_photos/entity/tag.dart';
+import 'package:nc_photos/entity/tag/data_source.dart';
 import 'package:nc_photos/k.dart' as k;
 import 'package:nc_photos/mobile/android/android_info.dart';
 import 'package:nc_photos/mobile/self_signed_cert_manager.dart';
@@ -157,6 +159,7 @@ void _initDiContainer() {
     shareRepo: ShareRepo(ShareRemoteDataSource()),
     shareeRepo: ShareeRepo(ShareeRemoteDataSource()),
     favoriteRepo: const FavoriteRepo(FavoriteRemoteDataSource()),
+    tagRepo: const TagRepo(TagRemoteDataSource()),
     appDb: AppDb(),
     pref: Pref(),
   ));
diff --git a/lib/theme.dart b/lib/theme.dart
index 3962a820..7d619e55 100644
--- a/lib/theme.dart
+++ b/lib/theme.dart
@@ -65,6 +65,11 @@ class AppTheme extends StatelessWidget {
         : Colors.white60;
   }
 
+  static Color getPrimaryTextColorInverse(BuildContext context) =>
+      Theme.of(context).brightness == Brightness.light
+          ? primaryTextColorDark
+          : primaryTextColorLight;
+
   static Color getAppBarDarkModeSwitchColor(BuildContext context) {
     return Colors.black87;
   }
diff --git a/lib/use_case/list_file_tag.dart b/lib/use_case/list_file_tag.dart
new file mode 100644
index 00000000..0d40d737
--- /dev/null
+++ b/lib/use_case/list_file_tag.dart
@@ -0,0 +1,16 @@
+import 'package:nc_photos/account.dart';
+import 'package:nc_photos/di_container.dart';
+import 'package:nc_photos/entity/file.dart';
+import 'package:nc_photos/entity/tag.dart';
+
+class ListFileTag {
+  ListFileTag(this._c) : assert(require(_c));
+
+  static bool require(DiContainer c) => DiContainer.has(c, DiType.tagRepo);
+
+  /// Return list of tags associated with [file]
+  Future<List<Tag>> call(Account account, File file) =>
+      _c.tagRepo.listByFile(account, file);
+
+  final DiContainer _c;
+}
diff --git a/lib/widget/viewer_detail_pane.dart b/lib/widget/viewer_detail_pane.dart
index c349981f..d00c6837 100644
--- a/lib/widget/viewer_detail_pane.dart
+++ b/lib/widget/viewer_detail_pane.dart
@@ -24,6 +24,7 @@ import 'package:nc_photos/platform/features.dart' as features;
 import 'package:nc_photos/platform/k.dart' as platform_k;
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/theme.dart';
+import 'package:nc_photos/use_case/list_file_tag.dart';
 import 'package:nc_photos/use_case/remove_from_album.dart';
 import 'package:nc_photos/use_case/update_album.dart';
 import 'package:nc_photos/use_case/update_property.dart';
@@ -71,6 +72,7 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
         _initMetadata();
       }
     }
+    _initTags();
 
     // postpone loading map to improve responsiveness
     Future.delayed(const Duration(milliseconds: 750)).then((_) {
@@ -196,6 +198,46 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
               title: Text(widget.file.ownerId!.toString()),
               subtitle: Text(L10n.global().fileSharedByDescription),
             ),
+          if (_tags.isNotEmpty)
+            ListTile(
+              leading: Icon(
+                Icons.local_offer_outlined,
+                color: AppTheme.getSecondaryTextColor(context),
+              ),
+              title: SizedBox(
+                height: 40,
+                child: ListView.separated(
+                  scrollDirection: Axis.horizontal,
+                  itemCount: _tags.length,
+                  itemBuilder: (context, index) => Center(
+                    child: Wrap(
+                      children: [
+                        Container(
+                          decoration: BoxDecoration(
+                            color: AppTheme.getUnfocusedIconColor(context),
+                            borderRadius:
+                                const BorderRadius.all(Radius.circular(8)),
+                          ),
+                          padding: const EdgeInsets.symmetric(
+                              horizontal: 8, vertical: 4),
+                          alignment: Alignment.center,
+                          child: Text(
+                            _tags[index],
+                            style: TextStyle(
+                              fontSize: 12,
+                              color:
+                                  AppTheme.getPrimaryTextColorInverse(context),
+                            ),
+                          ),
+                        ),
+                      ],
+                    ),
+                  ),
+                  separatorBuilder: (context, index) =>
+                      const SizedBox(width: 8),
+                ),
+              ),
+            ),
           ListTile(
             leading: Icon(
               Icons.calendar_today_outlined,
@@ -296,6 +338,16 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
     }
   }
 
+  Future<void> _initTags() async {
+    final c = KiwiContainer().resolve<DiContainer>();
+    try {
+      final tags = await ListFileTag(c)(widget.account, widget.file);
+      _tags.addAll(tags.map((t) => t.displayName));
+    } catch (e, stackTrace) {
+      _log.shout("[_initTags] Failed while ListFileTag", e, stackTrace);
+    }
+  }
+
   Future<void> _onRemoveFromAlbumPressed(BuildContext context) async {
     assert(widget.album!.provider is AlbumStaticProvider);
     try {
@@ -477,6 +529,8 @@ class _ViewerDetailPaneState extends State<ViewerDetailPane> {
   int? _isoSpeedRatings;
   Tuple2<double, double>? _gps;
 
+  final _tags = <String>[];
+
   late final bool _canRemoveFromAlbum = _checkCanRemoveFromAlbum();
 
   var _shouldBlockGpsMap = true;