A fast, free, and open-source JSON formatter, validator, and minifier that runs entirely in your browser. No data is sent to any server.
Use it now - free-json-formatter.codama.dev
- Format & Beautify - Pretty-print JSON with configurable indentation (2 spaces, 4 spaces, or tabs)
- Minify - Compress JSON by removing all whitespace
- Validate - Check JSON syntax with detailed error messages (line and column)
- Tree View - Explore JSON structure with a collapsible, color-coded tree
- Copy & Download - One-click copy to clipboard or download as
.json - Dark Mode - Automatic light/dark theme based on system preference
- Multi-language - Available in English, German, Spanish, and Hebrew (RTL supported)
- 100% Client-side - Your data never leaves your browser
- No Signup - No account, no tracking beyond basic analytics, no limits
| Layer | Technology |
|---|---|
| Framework | React 19 |
| Build | Vite 7 |
| Styling | Tailwind CSS 4 |
| Components | shadcn/ui (Radix primitives) |
| i18n | react-i18next |
| Hosting | Cloudflare Pages |
| Analytics | Google Analytics 4 |
# Install dependencies
pnpm install
# Start dev server
pnpm dev
# Build for production
pnpm build
# Run tests
pnpm test# Format & lint
pnpm formatsrc/
pages/
ToolPage.tsx # Main JSON formatter UI
PageHeader.tsx # Orange gradient hero
PageFooter.tsx # Codama branding + cross-tool links
AboutPage.tsx # Codama services page
components/
ShareModal.tsx # Social sharing after first use
ui/ # shadcn/ui components
lib/
tool-config.ts # Tool name, URL, config
analytics.ts # GA4 setup
locales/ # i18n translations (en, de, es, he)
| Tool | URL |
|---|---|
| QR Code Generator | free-qr-code.codama.dev |
| JSON Formatter | free-json-formatter.codama.dev |
More tools coming soon. All free, all open source.
Codama is a software agency that builds web apps, mobile apps, automation, AI integrations, and data solutions.
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MIT