An open source userscript manager.

Violentmonkey provides userscripts support for browsers.


  • Powerful

    • Customize web pages.
    • Automate your work.
  • Data on the cloud

    • Sync to Dropbox, OneDrive, Google Drive, or a WebDAV service.
    • Sync between different browsers.
  • User-friendly

    • Keep simple, no need to make choices.
    • Communicate with external editors.

Note: This extension does not contain any ads and does not modify web pages automatically. Any changes and modifications on the sites are done by installed scripts. Therefore, please install only scripts that you trust.

Supported Browsers

Violentmonkey is built with web extension APIs, thus supports many browsers.

  • Chrome Chrome
  • Firefox Firefox
  • Edge Edge
  • Opera Opera
  • Vivaldi Vivaldi
  • Chromium More Chromium based browsers


  • Greasemonkey Greasemonkey
  • Tampermonkey Tampermonkey


You are absolutely welcome to contribute code to GitHub.

You are welcome to help with this website too. Documents, improvements, articles about Violentmonkey, etc.