ScriptCat icon

ScriptCat

by 王一之

v1.3.1 Updated Mar 22, 2026 4.14MiB
CWS
80K
Users
★ 4.48
65 reviews
#1966
of 207.1K
workflow
#636 of 31.8K
⚠️Requests 2 sensitive permissions Recently updated

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
ScriptCat screenshot 1ScriptCat screenshot 2

Reviews (3 cached)

★☆☆☆☆2026-03-26
Terabyte

After installing this extension the browser tried to connect to random domains. I only had Scriptcat and ViolentMonkey tabs open to export/import the scripts, so it couldn't have been anything else. Here are some of the domains: survey-smiles.com, fc-lc.xyz, fir3.net, cloudgallery.net, blackwidof.org, a2zapk.io, q.gs, urlcash.net, goneviral.com, imgbar.net, imgcandy.net. Clearly this extension is trying to open or inject random ad sites (if not malicious code).

★★☆☆☆2025-12-21
Chris Vydas

The script editor is ridiculously nearly impossible to use on a mobile phone that is the only complaint and it is a deal breaker unfortunately. Also script cat says developer mode needs to be enabled to run scripts and yet it is already enabled and therefore it doesn't work

★★★☆☆2025-08-16
Çağatay Karakuş

After ViolentMonkey's demise of Manifest v2, ScriptCat looks promising but fails to deliver even close performance or UI features. If you check their site (mostly Chinese), you'll see even it advertises itself to be a TamperMonkey clone. TamperMonkey is literally the oldest script manager there's so I'd rather switch back to it instead of switching into this unknown extension. I recently checked my extension collection and saw lots of extensions either being banned or removed due to their practices so sticking with TamperMonkey instead of having to remove ScriptCat in the future for another reason.

Permissions (17)

Permissions

activeTab Can access the current tab when you click the extension alarms Can schedule periodic background tasks background clipboardWrite Can write to your clipboard contextMenus Can add items to the right-click menu cookies Can read and modify browser cookies declarativeNetRequest Can block or redirect network requests downloads Can manage and monitor downloads notifications Can show desktop notifications offscreen scripting Can inject scripts into web pages storage Can store data locally in your browser tabs Can see your open tabs and their URLs unlimitedStorageuserScripts webNavigation Can monitor navigation events webRequest Can observe and analyze network traffic

Details

Version 1.3.1
Updated Mar 22, 2026
Size 4.14MiB
First Seen Mar 31, 2026