Ship browser extensions in minutes
Chat with AI to create production-ready browser extensions. See live previews, iterate in real-time, and ship to Chrome, Edge, and Firefox stores in minutes.
No credit card required. Build your first extension in under 5 minutes.
Features
Everything you need to ship extensions
From idea to Chrome Web Store in minutes, not weeks. Extendable handles the complexity so you can focus on your extension's value.
Chat-Driven Development
Describe your extension in natural language. Our AI understands browser APIs, manifest v3, and extension best practices.
Live VNC Preview
See your extension running in a real Chromium browser. Test clicks, popups, and sidepanels in real-time.
Cloud Sandboxes
Extensions build and run in isolated E2B sandboxes. No local setup required - start building in seconds.
Iterative Refinement
Not quite right? Keep chatting to refine. Add features, fix bugs, and polish your extension conversationally.
One-Click Export
Download your extension as a ready-to-submit ZIP file. Includes manifest, icons, and all required assets.
Manifest V3 Ready
All extensions use the latest Manifest V3 format, ensuring compatibility with Chrome Web Store requirements.
How It Works
From idea to store in 5 steps
No boilerplate, no documentation diving, no debugging chrome.tabs errors. Just describe, build, and ship.
Describe Your Extension
Tell the AI what you want to build. "Create an extension that shows word count in the sidepanel" is all you need.
I'll help you build that! Let me create: • manifest.json with sidepanel permissions • sidepanel UI with counter display • content script to analyze pages
Watch It Build
AI writes manifest.json, background scripts, content scripts, and UI. See progress in real-time.
✓ Created manifest.json ✓ Built sidepanel.html with UI ✓ Added content script for counting Your extension is ready to test!
Test in Live Browser
Your extension loads automatically in a cloud Chromium instance. Click, test, and interact through VNC preview.
Word Counter
Extension ID: abcdefgh...
Iterate & Refine
Not perfect? Keep chatting. "Add a dark mode toggle" or "Fix the popup width" - AI handles the changes.
Absolutely! I'll add: • Dark mode toggle button • Theme switching logic • CSS variables for both themes
Export & Publish
Download your extension as a store-ready ZIP. Submit to Chrome, Edge, or Firefox with confidence.
Word Counter
Extension ID: abcdefgh...
Market Opportunity
Reach billions of users
Browser extensions are one of the most underrated distribution channels. Build once with Extendable, deploy to every major browser store.
Chrome Web Store
monthly active users
extensions published
Microsoft Edge
monthly active users
extensions published
Firefox Add-ons
monthly active users
extensions published
The extension market is growing 15% year-over-year. Get your idea in front of users today.
Use Cases
Build any extension you can imagine
From simple utilities to complex tools, Extendable handles popups, sidepanels, content scripts, background workers, and more.
Tab Manager
"Build an extension that groups tabs by domain and lets me save/restore tab sessions"
API Inspector
"Create a sidepanel that shows all network requests with response times and payloads"
Reading Mode
"Make an extension that strips ads and reformats articles for easy reading"
Screenshot Tool
"Build an extension to capture visible page or full-page screenshots with annotation"
Price Tracker
"Create an extension that tracks Amazon prices and alerts when they drop"
Text-to-Speech
"Build an extension that reads selected text aloud with adjustable speed"
FAQ
Frequently asked questions
Everything you need to know about building extensions with Extendable.