Give your browsersuperpowers
Block ads, supercharge video, automate the boring stuff — install community scripts from the store in one click, with background scripts and powerful APIs for developers. Tampermonkey-compatible, so your existing scripts migrate at zero cost.
3No code, just one click to fix daily annoyances
Grab a script from the store — ads, video, shopping, productivity, all handled for you.
Video, fully enhanced
Speed control, auto-skip ads, one-click download, picture-in-picture — a better Bilibili / YouTube / Netflix.
Shopping · Price compare
Compare prices everywhere, price-history charts, one-click coupons.
Shopping helper30 seconds to your first script
No complex setup — just follow three steps: install and go.
Install the extension
Add it from the Chrome / Edge / Firefox store in one click, or install manually.
Browse the store
Explore thousands of scripts in the ScriptCat community and pick a favorite.
One-click install
Click install and the script takes effect on the page right away.
Powerful core, peace of mind
From compatibility to security, from everyday users to developers — ScriptCat has it covered.
Tampermonkey-compatible
Fully compatible with the userscript format and GM APIs — migrate existing scripts with zero changes and no switching cost.
Supports GM_* APIs · identical metadata blockScript store
Install thousands of community scripts in one click, or publish your own and build the ecosystem together.
Secure & reliable
Transparent, controllable permissions and visible behavior — malicious scripts stopped at the source.
Cloud sync
Scripts and settings sync across devices — nothing lost when you switch or reinstall.
Background scripts
Unique: scripts keep running in the background without an open tab.
Powerful APIs
Richer than GM: file storage, scheduled tasks and cross-origin requests at your fingertips.
Turn your browser into your code runtime
Background scripts, rich APIs, a built-in editor and debugging tools — from your first line to production, all in one place.
Background scripts
No pinned tab required — scripts keep running in the background.
Powerful APIs
File storage, cron scheduling and cross-origin requests — all included.
Built-in editor
Syntax highlighting, smart completion and error hints make scripting smooth.
Live debugging
Logs, run history and error tracking — problems at a glance.
checkin.user.jsRunScriptCat › 签到成功 · 200 OKBuilt by the community
Fully open source, transparent and free. Every line of code is auditable, every contributor is seen.
Ready to give your browser
superpowers?
Install from the store in one click, or download the package manually. 30 seconds to unlock web superpowers.