Run scripts on
any page.
ScriptMonkey is a lightweight userscript manager for Chrome. Install custom scripts that run on any website — no developer tools, no copy-paste.
Small, fast, no nonsense
Everything you need to run userscripts, nothing you don't.
Full GM API
Supports the userscript APIs you already know — GM_setValue, GM_getValue, GM_xmlhttpRequest, GM_addStyle and more.
Dashboard
A full options page to manage every installed script — enable, disable, edit, import and export in bulk.
Auto-detect
The popup shows which scripts match the page you're on, so you always know what's running.
Manifest V3
Built on the latest Chrome extension platform with contextIsolation, sandboxing and a strict CSP.
Get ScriptMonkey running in 3 steps
Chrome doesn't store third-party unpacked extensions, so you load it once as a developer.
-
1
Download & extract
Click Download extension above and unzip the
ScriptMonkey.zipfile anywhere on your computer — somewhere it won't get deleted. -
2
Open the extensions page
In Chrome, go to
chrome://extensionsand turn on Developer mode using the toggle in the top-right corner. -
3
Load the extension
Click Load unpacked and select the folder you extracted (the one containing
manifest.json). ScriptMonkey appears in your toolbar.
Common questions
Why "Load unpacked" instead of the Chrome Web Store?
ScriptMonkey is a private extension — it isn't published to the Web Store. Loading it unpacked gives you the exact same functionality with no store review delay.
Will it stop working after I close Chrome?
No. Once loaded, Chrome remembers the extension across restarts. You only need to repeat the process if you move or delete the extracted folder.
Can I import scripts from Tampermonkey?
Yes. ScriptMonkey reads standard userscript metadata blocks (// ==UserScript==). Export your scripts as .js files from Tampermonkey and import them from the ScriptMonkey dashboard.
Where are my scripts stored?
In Chrome's extension storage (synced locally). You can export every script as a backup from the dashboard at any time.