Local JavaScript editor that runs entirely in your browser
Try Glyphide → | Migrate old links | Issues
Write, run, and share JavaScript code instantly. No servers, no accounts, just code.
Glyphide is a JavaScript editor that runs completely in your browser. I built it because I needed something simple but powerful - no login screens, no external servers, no complexity.
Your code runs locally on your machine and gets encoded in the URL for sharing. That's it.
Good for:
- Quick prototyping without opening your IDE
- Building custom calculators
- Learning JavaScript with immediate feedback
- Sharing working code examples
- Embedding demos in documentation
I needed to help my partner calculate international shipping costs. The courier had rules but no calculator, so I wanted to write a quick JavaScript solution for her to use easily.
Problem: there wasn't a good place to run JavaScript that was both simple and powerful. Everything required accounts, had paywalls, or was too basic.
So I built Glyphide. It's basically a super flexible calculator if you know JavaScript.
Technical stuff:
- Uses QuickJS engine (via sebastianwessel/quickjs & quickjs-emscripten)
- Everything runs client-side in your browser
- Code gets encoded in the URL for sharing
- No backend servers or databases involved
- Works offline after first load
What I can promise:
- Your code stays on your device during execution
- I don't store or process your code on servers
- No user tracking or analytics from my side
What I can't control:
- GitHub Pages (where it's hosted) probably collects standard web analytics
If you have old links from when this project was called JSoD, use the migration tool to convert them. Your code will be exactly the same, just the URL format changes.
// Calculate compound interest
const principal = 1000;
const rate = 0.05;
const years = 10;
const result = principal * Math.pow(1 + rate, years);
console.log(`$${principal} becomes $${result.toFixed(2)} after ${years} years`);When you run code in Glyphide, it automatically generates a shareable URL like the one above. Send it to anyone and they'll see your working code.
This is an open source project and I appreciate help:
- Found a bug? Report it
- Want a feature? Ask for it
- Want to code? Fork it and send a PR
git clone https://github.com/Pkcarreno/glyphide.git
cd glyphide
pnpm install
pnpm devOpen http://localhost:4000 and you're ready.
Working on right now:
- Documentation page to make everything clearer
Maybe later:
- TypeScript support
- Import from npm packages
- More sharing options
No strict roadmap - I build what seems useful or what people ask for.
While Glyphide runs code in a sandboxed environment, be careful with code from untrusted sources. The local-first approach means your code stays on your device, but malicious code could still do browser-level damage.
This project builds on great open source work:
- sebastianwessel/quickjs & quickjs-emscripten - makes JavaScript execution possible
- codi.link - inspiration for browser-based editors
Glyphide - JavaScript that stays local