.user.js — Userscript
A JavaScript file meant to be run by a userscript manager (like Tampermonkey or Greasemonkey) to modify how specific web pages look or behave.
Userscripts run automatically on the pages you visit and can read or modify page content. Only install userscripts from authors and sources you trust.
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Frequently asked questions
What is a .user.js file?
A JavaScript file meant to be run by a userscript manager (like Tampermonkey or Greasemonkey) to modify how specific web pages look or behave.
Can I edit a .user.js file?
Yes — .user.js files are commonly editable with software such as Tampermonkey.
Does having a .user.js extension mean the file is safe?
No single extension can guarantee that. Userscripts run automatically on the pages you visit and can read or modify page content. Only install userscripts from authors and sources you trust. Always consider where the file came from, not just its name.