The next-generation mod manager for League of Legends, built by the League Toolkit organization. LTK Manager is the modern successor to cslol-manager, rebuilt from the ground up with a Rust backend and a React-based UI.
| Mod Library | Workshop | Settings |
|---|---|---|
 |
 |
 |
- Mod Library — Install, enable, disable, reorder, and uninstall mods with a visual card-based interface. Supports drag-and-drop installation.
- Profile Management — Create multiple profiles to quickly switch between different mod configurations.
- Workshop (Creator Tools) — Build and package your own mods with a full project editor, layer management, and
.modpkgexport. - Mod Inspector — Preview mod contents and metadata before installing.
- Overlay Patcher — Apply your mods to League of Legends with a single click. Real-time progress tracking keeps you informed.
- Automatic Updates — The app checks for new versions and can update itself in the background.
- Theming — Dark and light themes with a fully customizable accent color and optional backdrop images.
| Format | Description |
|---|---|
.modpkg |
LeagueToolkit mod package — the recommended format with full metadata, thumbnails, and multi-layer support |
.fantome |
Legacy Fantome format — automatically recognized and fully supported |
- Windows 10 or 11 (64-bit) for released installers.
- macOS 13 or newer on Apple Silicon for local source builds. Public macOS packages, Intel support, notarization, and auto-updates are not currently provided.
- League of Legends — a valid game installation.
- Go to the latest release.
- Download the
.msiinstaller (recommended) or the NSIS.exeinstaller. - Run the installer and launch LTK Manager.
- On first launch, the app will attempt to auto-detect your League of Legends installation. If it can't find it, you'll be prompted to select the game folder manually.
- Download a mod in
.modpkgor.fantomeformat from your preferred source. - Drag and drop the file onto the LTK Manager window, or use the install button.
- Enable the mod in your library and click Run to start the patcher.
Apple Silicon developers should use pnpm macos:dev, which builds the native ARM64 helper before
starting Tauri. See the Apple Silicon development guide
for the required local approval and preflight workflow.
LTK Manager is open-source under a dual MIT / Apache-2.0 license — you may choose either.
This application bundles cslol-dll.dll, the core injection module originally from cslol-manager. Its use and redistribution are governed by the CSLOL DLL License Addendum.
If you are a developer looking to reuse this DLL in your own launcher or tool, you must comply with the following:
- Re-signing — You may not redistribute the DLL with the official signature. You must re-sign it using your own publicly trusted code-signing certificate.
- Transparency — You must publish your certificate's SHA-256 fingerprint and the DLL's SHA-256 hash in your project's documentation or about page.
- Anti-Skinhacking — You must implement technical measures to prevent the use of "skinhacking" (replicating paid content) and competitive advantage mods.
- No Reverse Engineering — Patching or tampering with the DLL itself is strictly prohibited.
For full terms, see LICENSE-CSLOL.md.
The native macOS patcher is a separate MIT-licensed process under macos-patcher/. Its ARM64
Mach-O scanner and WAD redirection mechanism are adapted from the separately MIT-licensed
cslol-tools subtree of cslol-manager. See macos-patcher/NOTICE.md for the pinned source commit
and attribution.
- Use at your own risk. This software is not endorsed by or affiliated with Riot Games.
- Server support: Officially supports Riot-operated servers. Asian servers and Garena are not officially supported and may experience issues.
Contributions are welcome! Please open an issue or submit a pull request.
If you'd like to build LTK Manager from source or work on the codebase, see the Development Guide.
Developed by the League Toolkit organization.