diff --git a/Totoro.Core/Contracts/IAnimeIdService.cs b/Totoro.Core/Contracts/IAnimeIdService.cs
index 489bd8f9..1a90293d 100644
--- a/Totoro.Core/Contracts/IAnimeIdService.cs
+++ b/Totoro.Core/Contracts/IAnimeIdService.cs
@@ -6,4 +6,5 @@ public interface IAnimeIdService
 {
     Task<AnimeIdExtended> GetId(ListServiceType serviceType, long id);
     Task<AnimeIdExtended> GetId(long id);
+    Task UpdateOfflineMappings();
 }
diff --git a/Totoro.Core/Services/AnimeIdService.cs b/Totoro.Core/Services/AnimeIdService.cs
index 244c1bf2..3d6aedf5 100644
--- a/Totoro.Core/Services/AnimeIdService.cs
+++ b/Totoro.Core/Services/AnimeIdService.cs
@@ -1,4 +1,6 @@
-using Totoro.Core.Services.Simkl;
+using System.Text.Json.Nodes;
+using Flurl.Http;
+using Totoro.Core.Services.Simkl;
 
 namespace Totoro.Core.Services;
 
@@ -6,21 +8,100 @@ public class AnimeIdService : IAnimeIdService
 {
     private readonly ISettings _settings;
     private readonly ISimklService _simklService;
+    private readonly IKnownFolders _knownFolders;
+    private readonly IFileService _fileService;
+    private readonly string _dbUrl = @"https://raw.githubusercontent.com/Fribb/anime-lists/master/anime-offline-database-reduced.json";
+    private readonly string _fileName = @"ids.json";
+    private readonly List<AnimeIdExtended> _ids;
+    private bool _isUpdating;
 
     public AnimeIdService(ISettings settings,
-                          ISimklService simklService)
+                          ISimklService simklService,
+                          IKnownFolders knownFolders,
+                          IFileService fileService)
     {
         _settings = settings;
         _simklService = simklService;
+        _knownFolders = knownFolders;
+        _fileService = fileService;
+
+        _ids = fileService.Read<List<AnimeIdExtended>>(knownFolders.ApplicationData, _fileName) ?? new();
+    }
+
+    public async Task<AnimeIdExtended> GetId(ListServiceType serviceType, long id)
+    {
+        if(_isUpdating || _ids.FirstOrDefault(GetSelector(serviceType, id)) is not { } idExtended)
+        {
+            return await _simklService.GetId(serviceType, id);
+        }
+
+        return idExtended;
     }
 
-    public Task<AnimeIdExtended> GetId(ListServiceType serviceType, long id)
+    private static Func<AnimeIdExtended, bool> GetSelector(ListServiceType type, long serviceId)
     {
-        return _simklService.GetId(serviceType, id);
+        return type switch
+        {
+            ListServiceType.AniList => (AnimeIdExtended id) => id.AniList == serviceId,
+            ListServiceType.MyAnimeList => (AnimeIdExtended id) => id.MyAnimeList == serviceId,
+            ListServiceType.Kitsu => (AnimeIdExtended id) => id.Kitsu == serviceId,
+            ListServiceType.AniDb => (AnimeIdExtended id) => id.AniDb == serviceId,
+            _ => (AnimeIdExtended id) => false,
+        };
     }
 
-    public Task<AnimeIdExtended> GetId(long id)
+    public Task<AnimeIdExtended> GetId(long id) => GetId(_settings.DefaultListService, id);
+
+    public async Task UpdateOfflineMappings()
     {
-        return _simklService.GetId(_settings.DefaultListService, id);
+        var stream = await _dbUrl.GetStreamAsync();
+        var array = JsonNode.Parse(stream).AsArray();
+        var keys = new[]
+        {
+            "livechart_id",
+            "anidb_id",
+            "kitsu_id",
+            "mal_id",
+            "anilist_id"
+        };
+
+        _isUpdating = true;
+        _ids.Clear();
+
+        foreach (var item in array)
+        {
+            var id = new AnimeIdExtended();
+            var obj = item.AsObject();
+
+            foreach (var key in keys)
+            {
+                if(obj.ContainsKey(key))
+                {
+                    var value = obj[key].GetValue<long>();
+                    switch (key)
+                    {
+                        case "livechart_id":
+                            id.LiveChart = value;
+                            break;
+                        case "anidb_id":
+                            id.AniDb = value;
+                            break;
+                        case "kitsu_id":
+                            id.Kitsu = value;
+                            break;
+                        case "mal_id":
+                            id.MyAnimeList = value;
+                            break;
+                        case "anilist_id":
+                            id.AniList = value;
+                            break;
+                    }
+                }
+            }
+
+            _ids.Add(id);
+        }
+        _isUpdating = false;
+        _fileService.Save(_knownFolders.ApplicationData, _fileName, _ids);
     }
 }
diff --git a/Totoro.Core/Services/FileService.cs b/Totoro.Core/Services/FileService.cs
index 20c023d4..4b05691b 100644
--- a/Totoro.Core/Services/FileService.cs
+++ b/Totoro.Core/Services/FileService.cs
@@ -5,6 +5,11 @@ namespace Totoro.Core.Services;
 
 public class FileService : IFileService
 {
+    private readonly JsonSerializerSettings _settings = new()
+    {
+        DefaultValueHandling = DefaultValueHandling.Ignore
+    };
+
     public T Read<T>(string folderPath, string fileName)
     {
         var path = Path.Combine(folderPath, fileName);
@@ -24,7 +29,7 @@ public void Save<T>(string folderPath, string fileName, T content)
             Directory.CreateDirectory(folderPath);
         }
 
-        var fileContent = JsonConvert.SerializeObject(content);
+        var fileContent = JsonConvert.SerializeObject(content, Formatting.Indented, _settings);
         File.WriteAllText(Path.Combine(folderPath, fileName), fileContent, Encoding.UTF8);
     }
 
diff --git a/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml b/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml
index 259ea79a..df49dfa5 100644
--- a/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml
+++ b/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml
@@ -73,6 +73,16 @@
                 OnContent="On" />
         </labs:SettingsCard>
 
+        <labs:SettingsCard Description="This repository is to store and provide the mapping between various anime sources, (https://github.com/Fribb/anime-lists)" Header="Offline Anime DB">
+            <labs:SettingsCard.HeaderIcon>
+                <FontIcon Glyph="&#xE78C;" />
+            </labs:SettingsCard.HeaderIcon>
+            <Button
+                Command="{x:Bind UpdateOfflineDb}"
+                Content="Update"
+                Style="{ThemeResource AccentButtonStyle}" />
+        </labs:SettingsCard>
+
         <Grid Margin="0,20,0,0">
             <Grid.ColumnDefinitions>
                 <ColumnDefinition />
diff --git a/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml.cs b/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml.cs
index 2a8a20c3..37ce234e 100644
--- a/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml.cs
+++ b/Totoro.WinUI/Views/SettingsSections/AnimePluginsSection.xaml.cs
@@ -20,9 +20,13 @@ public SettingsViewModel ViewModel
         DependencyProperty.Register("ViewModel", typeof(SettingsViewModel), typeof(AnimePluginsSection), new PropertyMetadata(null));
 
 
+    public ICommand UpdateOfflineDb { get; }
+
     public AnimePluginsSection()
     {
         InitializeComponent();
+
+        UpdateOfflineDb = ReactiveCommand.CreateFromTask(() => App.GetService<IAnimeIdService>().UpdateOfflineMappings());
     }
 
     protected override void OnNavigatedTo(NavigationEventArgs e)