Developer Tool
Code Formatter & Minifier
Format or minify JSON, HTML, CSS and JavaScript instantly in your browser. No data ever sent to a server.
JSON · HTML · CSS · JavaScript
Format & Minify
100% Browser
Input
0 B
Output
0 B
Why format your code?
Readability
Formatted JSON or HTML is infinitely more readable than a compressed single line. Essential for debugging API responses or auditing code.
Web performance
Minifying CSS and JavaScript reduces their size by 30–60%, speeding up page loads and improving Core Web Vitals scores.
JSON validation
The JSON formatter validates syntax in real time and reports errors precisely — missing commas, unclosed braces, invalid values.
APIs & Integrations
Format API JSON responses to read them, or minify to embed in JS variables. An essential daily tool for developers.
FAQ
No. The formatter only adds whitespace and line breaks for readability. It does not modify the HTML semantics or how it renders in the browser.
This minifier performs basic optimizations (removing whitespace/comments). For production, use Terser, esbuild or your bundler (Webpack/Vite) which offer advanced optimizations.
No. All processing happens in your browser via JavaScript. No code is ever transmitted or stored anywhere.