scriptscat/scriptcat
ScriptCat, a browser extension that can execute userscript; 脚本猫，一个可以执行用户脚本的浏览器扩展 observed · 2026-08-28
Health v2 · maintenance only
96/100
- Activity 99
- Release rhythm 90
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 7
- age_days: 2065
- days_rel: 68
- days_push: 8
- n_releases_24m: 30
Adoption not part of the score
5177 stars · 382 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
ScriptCat is an open-source browser extension that acts as a userscript manager, fully compatible with Tampermonkey scripts and GM_* APIs. It adds unique capabilities like background scripts, scheduled (cron) scripts, cloud sync, script subscriptions, and a built-in code editor with intelligent completion.
Use cases
- run userscripts to remove ads from web pages
- migrate existing Tampermonkey scripts to an open-source manager
- run scripts in the background without an open tab
- schedule scripts to run automatically like daily check-ins
- sync installed scripts across devices and browsers
- write and debug userscripts with a built-in editor
- install community scripts from GreasyFork or the ScriptCat script store
When to choose
- you want a free, open-source, privacy-focused Tampermonkey alternative
- you need background or cron-scheduled userscript execution
- you want cloud sync of scripts across Chrome, Edge, and Firefox
- you develop userscripts and want an integrated editor with GM API support
When to avoid
- you only need content blocking rather than script execution (a dedicated ad blocker is simpler)
- you rely on every Tampermonkey API, since only a subset is implemented
- you need a manager for browsers other than Chromium/Firefox-based ones
Facets
plugin · maturity active
browser-extension developer-tools workflow-automation plugin-system cli browser-extensions web-development developer-tools browser browser-extension cross-platform userscript-manager tampermonkey-compatible greasemonkey webextension background-scripts scheduled-scripts cloud-sync script-editor gm-api automation
9 sources
- readme: https://github.com/scriptscat/scriptcat · fetched 2026-08-28 · 7d97df7bb8ab
- homepage: https://docs.scriptcat.org · fetched 2026-08-29 · 995d7939aa1e
- site_page: https://docs.scriptcat.org/docs/use/use · fetched 2026-08-29 · d08b0adae754
- site_page: https://docs.scriptcat.org/docs/dev · fetched 2026-08-29 · 48f1cf6ccbe9
- site_page: https://docs.scriptcat.org/docs/change · fetched 2026-08-29 · ac4d4bdec239
- site_page: https://docs.scriptcat.org/docs/dev/api · fetched 2026-08-29 · 4c665d887dab
- site_page: https://docs.scriptcat.org/docs/use/qa · fetched 2026-08-29 · 5352812610e7
- site_page: https://docs.scriptcat.org/docs/use/policy/privacy · fetched 2026-08-29 · 45062d223768
- site_page: https://docs.scriptcat.org/docs/use/policy/disclaimer · fetched 2026-08-29 · 3aa40791517b
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| scriptscat/scriptcat | main | 96 |
For agents
markdown · JSON · MCP: product_card(name="scriptscat/scriptcat")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem