diff --git a/lib/pages/settings_views/global_settings_view/appearance_settings/manage_themes.dart b/lib/pages/settings_views/global_settings_view/appearance_settings/manage_themes.dart
index 05aff5967..1d0ae9e0f 100644
--- a/lib/pages/settings_views/global_settings_view/appearance_settings/manage_themes.dart
+++ b/lib/pages/settings_views/global_settings_view/appearance_settings/manage_themes.dart
@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:stackwallet/pages/settings_views/global_settings_view/appearance_settings/sub_widgets/install_theme_from_file_dialog.dart';
 import 'package:stackwallet/pages/settings_views/global_settings_view/appearance_settings/sub_widgets/stack_theme_card.dart';
 import 'package:stackwallet/providers/global/prefs_provider.dart';
 import 'package:stackwallet/themes/stack_colors.dart';
@@ -28,6 +29,13 @@ class _ManageThemesViewState extends ConsumerState<ManageThemesView> {
 
   Future<List<StackThemeMetaData>> future = Future(() => []);
 
+  void _onInstallPressed() {
+    showDialog<void>(
+      context: context,
+      builder: (context) => const InstallThemeFromFileDialog(),
+    );
+  }
+
   @override
   void initState() {
     _showThemes = ref.read(prefsChangeNotifierProvider).externalCalls;
@@ -72,7 +80,7 @@ class _ManageThemesViewState extends ConsumerState<ManageThemesView> {
                       padding: const EdgeInsets.all(16),
                       child: SecondaryButton(
                         label: "Install theme file",
-                        onPressed: () {},
+                        onPressed: _onInstallPressed,
                       ),
                     ),
                   ],
@@ -106,7 +114,7 @@ class _ManageThemesViewState extends ConsumerState<ManageThemesView> {
                       ),
                       SecondaryButton(
                         label: "Install theme file",
-                        onPressed: () {},
+                        onPressed: _onInstallPressed,
                       ),
                       const Spacer(),
                     ],
diff --git a/lib/pages/settings_views/global_settings_view/appearance_settings/sub_widgets/install_theme_from_file_dialog.dart b/lib/pages/settings_views/global_settings_view/appearance_settings/sub_widgets/install_theme_from_file_dialog.dart
new file mode 100644
index 000000000..563561c30
--- /dev/null
+++ b/lib/pages/settings_views/global_settings_view/appearance_settings/sub_widgets/install_theme_from_file_dialog.dart
@@ -0,0 +1,182 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:file_picker/file_picker.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_svg/svg.dart';
+import 'package:stackwallet/themes/stack_colors.dart';
+import 'package:stackwallet/themes/theme_service.dart';
+import 'package:stackwallet/utilities/assets.dart';
+import 'package:stackwallet/utilities/logger.dart';
+import 'package:stackwallet/utilities/show_loading.dart';
+import 'package:stackwallet/utilities/text_styles.dart';
+import 'package:stackwallet/utilities/util.dart';
+import 'package:stackwallet/widgets/desktop/primary_button.dart';
+import 'package:stackwallet/widgets/desktop/secondary_button.dart';
+import 'package:stackwallet/widgets/stack_dialog.dart';
+
+class InstallThemeFromFileDialog extends ConsumerStatefulWidget {
+  const InstallThemeFromFileDialog({Key? key}) : super(key: key);
+
+  @override
+  ConsumerState<InstallThemeFromFileDialog> createState() =>
+      _InstallThemeFromFileDialogState();
+}
+
+class _InstallThemeFromFileDialogState
+    extends ConsumerState<InstallThemeFromFileDialog> {
+  late final TextEditingController controller;
+
+  Future<bool> _install() async {
+    try {
+      final fileBytes = await File(controller.text).readAsBytes();
+      await ref.read(pThemeService).install(
+            themeArchive: ByteData.view(
+              fileBytes.buffer,
+            ),
+          );
+      return true;
+    } catch (e, s) {
+      Logging.instance.log(
+        "Failed to install theme: $e\n$s",
+        level: LogLevel.Warning,
+      );
+      return false;
+    }
+  }
+
+  Future<void> _pickFile() async {
+    try {
+      final result = await FilePicker.platform.pickFiles(
+        dialogTitle: "Choose theme file",
+        type: FileType.custom,
+        allowedExtensions: ["zip"],
+        lockParentWindow: true, // windows only
+      );
+
+      if (result != null && mounted) {
+        setState(() {
+          controller.text = result.paths.first ?? "";
+        });
+      }
+    } catch (e, s) {
+      Logging.instance.log("$e\n$s", level: LogLevel.Error);
+    }
+  }
+
+  @override
+  void initState() {
+    controller = TextEditingController();
+    super.initState();
+  }
+
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return StackDialogBase(
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Text(
+            "Install theme file",
+            style: STextStyles.pageTitleH2(context),
+          ),
+          const SizedBox(
+            height: 12,
+          ),
+          TextField(
+            autocorrect: Util.isDesktop ? false : true,
+            enableSuggestions: Util.isDesktop ? false : true,
+            onTap: _pickFile,
+            controller: controller,
+            style: STextStyles.field(context),
+            decoration: InputDecoration(
+              hintText: "Choose file...",
+              hintStyle: STextStyles.fieldLabel(context),
+              suffixIcon: UnconstrainedBox(
+                child: Row(
+                  children: [
+                    const SizedBox(
+                      width: 16,
+                    ),
+                    SvgPicture.asset(
+                      Assets.svg.folder,
+                      color:
+                          Theme.of(context).extension<StackColors>()!.textDark3,
+                      width: 16,
+                      height: 16,
+                    ),
+                    const SizedBox(
+                      width: 12,
+                    ),
+                  ],
+                ),
+              ),
+            ),
+            readOnly: true,
+          ),
+          const SizedBox(
+            height: 20,
+          ),
+          Row(
+            children: [
+              Expanded(
+                child: SecondaryButton(
+                  label: "Cancel",
+                  onPressed: Navigator.of(context).pop,
+                ),
+              ),
+              const SizedBox(
+                width: 16,
+              ),
+              Expanded(
+                child: PrimaryButton(
+                  label: "Install",
+                  enabled: controller.text.isNotEmpty,
+                  onPressed: () async {
+                    final result = await showLoading(
+                      whileFuture: _install(),
+                      context: context,
+                      message: "Installing ${controller.text}...",
+                    );
+                    if (mounted) {
+                      Navigator.of(context).pop();
+                      if (!result) {
+                        unawaited(
+                          showDialog(
+                            context: context,
+                            builder: (_) => StackOkDialog(
+                              title: "Failed to install theme:",
+                              message: controller.text,
+                            ),
+                          ),
+                        );
+                      } else {
+                        unawaited(
+                          showDialog(
+                            context: context,
+                            builder: (_) => const StackOkDialog(
+                              title: "Theme install succeeded!",
+                            ),
+                          ),
+                        );
+                      }
+                    }
+                  },
+                ),
+              ),
+            ],
+          )
+        ],
+      ),
+    );
+  }
+}