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Description
ScriptCat, a browser extension that can execute user scripts, everything can be scripted, allowing your browser to do more things!
## About
We built a framework for executing background scripts and Greasemonkey/Tampermonkey scripts based on the design ideas of Greasemonkey/Tampermonkey. It also has several unique APIs that enable scripts to do more. Furthermore, we provide a fantastic online editor that makes script code development more pleasant and easy.
**Please Star it if you find it useful. ❤❤❤**
## Features
- Cloud Sync: script recovery is easy when changing or reinstalling browser
- Scripts subscription: creating your own script collections or enabling multiple scripts to work together.
- Compatibility: allowing seamless migration from other userscript managers.
- Background scripts: allowing your scripts to run continuously in the background.
- Scheduled scripts: allowing for daily scheduled tasks. You can use them for automatic check-ins, timed reminders, and more.
- Rich API: more powerful APIs than other managers, which can realize more functions.
- Sandbox mechanism: ensuring user safety, script permissions are granted only with user consent.
- Excellent editor: providing API auto-completion and ESLint.
- Nice UI
...More features are Coming.
### Discussion
- [Telegram](https://t.me/scriptscat)
- [Discord](https://discord.gg/JF76nHCCM7)
- [油猴中文网](https://bbs.tampermonkey.net.cn/)
## Other
API Document: https://docs.scriptcat.org/en/docs/dev/
Github: https://github.com/scriptscat/scriptcat
Reviews
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Permissions (17)
Permissions
activeTabℹ Can access the current tab when you click the extension alarmsℹ Can schedule periodic background tasks background clipboardWriteℹ Can write to your clipboard contextMenusℹ Can add items to the right-click menu cookiesℹ Can read and modify browser cookies declarativeNetRequestℹ Can block or redirect network requests downloadsℹ Can manage and monitor downloads notificationsℹ Can show desktop notifications offscreen scriptingℹ Can inject scripts into web pages storageℹ Can store data locally in your browser tabsℹ Can see your open tabs and their URLs unlimitedStorageuserScripts webNavigationℹ Can monitor navigation events webRequestℹ Can observe and analyze network traffic
Details
| Version | 1.4.0.1100 |
| Updated | Mar 19, 2026 |
| Size | 4.14MiB |
| First Seen | Mar 28, 2026 |
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