Write, save, and inject custom JavaScript and CSS into any website. Per-domain scripts, auto-inject on load, and a built-in snippet library.
Write custom JavaScript or CSS and inject it into the current tab with one click. Uses Chrome's scripting API for reliable execution.
FREEScripts remember which domain they belong to. When you visit a site, your scripts for that domain are ready to go.
FREESave up to 3 scripts synced across devices via Chrome storage. Name them, organize them, toggle them on and off.
FREEMonospace editor with line numbers, tab support, and syntax-aware placeholder. Dark theme that matches your workflow.
FREEHit Run and see instant success or error feedback. Errors from your script are caught and displayed clearly.
FREEToggle scripts on or off without deleting them. Quickly test with and without your customizations.
FREERemove the 3-script limit. Save as many scripts as you need across all your domains and projects.
PROScripts run automatically when you visit a matching domain. No need to open the popup every time. Set it and forget it.
PRO12+ built-in snippets: dark mode, hide ads, custom fonts, wide layout, performance timer, scroll progress bar, and more.
PROExport all your scripts as JSON for backup or sharing. Import scripts from colleagues or your other machines.
PROSee console.log, warn, and error output from your injected scripts right in the popup. No DevTools needed.
PROFine-grained control over each script. Disable specific scripts for testing without losing your code.
PRO