Welcome to Greasy Fork, a site for user scripts.
What are user scripts?
User scripts put you in control of your browsing experience. Once installed, they automatically make the sites you visit better by adding features, making them easier to use, or taking out the annoying bits. The user scripts on Greasy Fork were written by other users and posted to share with the world. They're free to install and easy to use.
Step 1: install a user script manager
To use user scripts you need to first install a user script manager. Which user script manager you can use depends on which browser you use.
Desktop Mobile (Android) Mobile (iOS)
- Chrome: Tampermonkey
- Firefox: Greasemonkey, Tampermonkey, or Violentmonkey
- Safari: Tampermonkey or Userscripts
- Microsoft Edge: Tampermonkey
- Opera: Tampermonkey or Violentmonkey
- Maxthon: Violentmonkey
- AdGuard: (no additional software required)
- Firefox: Greasemonkey, Tampermonkey, or Violentmonkey
- Microsoft Edge: Tampermonkey
- Maxthon: Violentmonkey
- Dolphin: Tampermonkey
- UC: Tampermonkey
- XBrowser
- Safari: Tampermonkey or Userscripts
- Gear: (no additional software required)
Step 2: install a user script
Browse this site to find a user script you want to try. Here is a sample of the most popular scripts:
- Pixiv Previewer - Display preview images (support single image, multiple images, moving images); Download animation(.zip); Sorting the search page by favorite count(and display it).
- Video Quality Fixer for X (Twitter) - Force highest quality playback for X (Twitter) videos.
- Sketchfab Auto PreferredFormat Downloader and Attribution Saver Script - Automatically downloads preferred format and saves attribution from Sketchfab for one tab at a time. If you can automate this further; give it a try
- Grok Ultimate Manager 2026 (Fixed Detection & Defaults) new - Ultimate Grok Manager + Offline Video DB + MP4 Download + Toggle Previews + Image Edits + Image Capture + Full Media Export
- ChatGPT/Claude/Grok/Arena | Conversation/Chat Markdown Export/Download - Export AI chat conversations to Markdown. Supports ChatGPT, Claude.ai, Grok.com, and Arena.ai. Features: one-click export, clean Markdown output, draggable button, configurable settings, and support for artifacts, attachments, thinking/reasoning, code blocks, search results, citations, and model attribution.
Once you've found a user script, click the green install button on the user script's page, and your user script manager will ask you to confirm the install.
Step 3: use the user script
Go to the site the user script affects. It should automatically do its thing. After trying out the user script for a while, go back to where you installed the user script and leave some feedback for the user script's author.