Jellyboxd

A userscript that shows whether a movie on Letterboxd is available in your Jellyfin library via API.

Features

• exact TMDB ID matching, with title and year matching as a fallback;
• Jellyfin 12 compatible authentication;
• expandable media details with support for multiple versions;
• automatic retries for temporary connection failures.

Installation

1. Install a userscript manager such as Violentmonkey or Tampermonkey.
2. Install Jellyboxd.
3. Open a Letterboxd movie page and select Configure.
4. Enter your Jellyfin server URL and API key.

Updates are installed automatically from this repository.

Configuration

The Jellyfin server URL and API key are stored locally in the userscript manager's browser storage, separate from the script and its automatic updates.