What Is Greasy Fork Used For: Features, Reviews & Alternatives
A popular repository for finding and sharing user scripts.
Editorially updated Oct 5, 2025
Greasy Fork
greasyfork.org
The overview
What Greasy Fork is for
1Core Capabilitie
- Script search interface by keyword, tag, or domain
- One-click installation via userscript manager integration
- Script update notification and management
- Script version history and changelog acce
- User script code review and comment section
2Specialized Workflow
- Script submission portal with metadata editor
- Moderation queue for new and updated script
- Discussion forums for individual script
- User profile for managing authored and favorited script
- Code syntax highlighting for script review
Who it helps
Useful ways to use Greasy Fork
A practical path
Locate a Desired Script
Navigate to and use the search bar to find a script relevant to your needs (e.g., 'YouTube dark mode' or 'GitHub code folding'). Review the script's description, user reviews, and source code for suitability
External signals
Reviews & reputation
Aggregated review score
Highly regarded by developers and power users as the go-to repository for browser-side scripting. Praised for its vast collection, active community, and direct integration with userscript managers, though users emphasize the need for personal code review due to the open nature of submissions.
Quick answers
Frequently asked questions
1What is a userscript manager and why is it required to use Greasy Fork scripts?⌄
A userscript manager (like Tampermonkey for Chrome/Edge/Safari or Violentmonkey for Firefox/Chrome) is a browser extension that provides the runtime environment for userscripts. Greasy Fork hosts the script code, but the manager is responsible for injecting and executing that code into web pages, handling updates, and managing script permissions. Without one, your browser cannot run userscripts.
2Are scripts on Greasy Fork vetted for security or malicious code?⌄
Greasy Fork employs a community-driven moderation system and automated checks, but it does not guarantee that every script is free of malicious code. Users are strongly advised to review the script's source code, read comments, check its update history, and assess the author's reputation before installation. Exercise caution, as scripts run with significant browser privileges.
3How do I submit my own userscript to Greasy Fork, and what are the guidelines?⌄
To submit a script, you'll need to create an account. Navigate to the 'Submit a script' page, paste your JavaScript code, and fill in metadata like name, description, and target domains. Scripts must adhere to Greasy Fork's rules, which include being open source, not containing malicious code, and having a clear purpose. Submissions undergo a review process by moderators.
4Can userscripts break website functionality or cause performance issues?⌄
Yes, poorly written or conflicting userscripts can interfere with a website's native JavaScript, leading to broken functionality, UI glitches, or performance degradation. If you encounter issues, try disabling recently installed scripts one by one via your userscript manager to identify the culprit. It's good practice to test scripts on non-critical pages first.
5Does Greasy Fork host the script files directly, or does it link to external sources?⌄
Greasy Fork hosts the script files directly on its servers. When you install a script, your userscript manager downloads the code from Greasy Fork. This ensures version control, update notifications, and a consistent source for the script, rather than relying on potentially unstable external links.
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