🧰 Browser Extensions

Browser Extensions by HtmlRunner

Fast, private browser extensions for developers by the HtmlRunner team. Install in seconds — no accounts, no tracking.

Html Compiler

v1.0.0 Free

Write, test, and run HTML, CSS, and JavaScript instantly from your browser toolbar. Manual Run, live preview, import design, export & share — 100% local.

Chrome Manual Run Live Preview 100% Local

View Extension Details → Chrome Web Store ↗

Multisession

Coming Soon Free

Run up to 20 isolated browser sessions in one Chrome window. Multi-account manager with per-profile cookies, storage, IndexedDB, and fingerprint protection.

Chrome Multi-Account Session Isolation 100% Local

View Extension Details →

More HtmlRunner extensions are in the works. Have an extension idea? Send us your suggestion.

Most of them are free — every extension on this page is free to use right now. In the future we may introduce paid plans for better services and premium features, but the free versions will keep working.

No. HtmlRunner extensions run locally in your browser. Your code never leaves your device. See each extension's own privacy section for details.

Our extensions target Chromium-based browsers (Chrome, Edge, Brave and others). Check each extension's details page for specifics.

Use the contact form at htmlrunner.com/contact — we usually reply within 24 hours.

Need a Browser Extension?

Have an extension idea or need help with an existing one? Tell us about it.

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