JSON Formatter & Validator
Beautify, validate, and minify JSON instantly. 100% browser-based. Your data never leaves your device.
How It Works
Paste or Load JSON
Paste JSON text, use the Paste button, or load a .json file from your device.
Format or Minify
Click Format to beautify with proper indentation, or Minify to compress it.
Copy & Use
Copy the result to clipboard. If JSON is invalid, you'll see the exact error location.
Features
Pretty Print
Beautify minified JSON into readable, indented format. Choose 2 or 4 spaces.
Validate
Instantly detect syntax errors with precise error messages showing what went wrong.
Minify
Compress JSON by removing whitespace. See the percentage reduction instantly.
100% Private
Your JSON data stays in your browser. Nothing is sent to any server.
File Support
Load .json files directly from your computer. No size limit.
Instant
No loading time. Format megabytes of JSON data in milliseconds.
Pro Tips
- ● Validate before debugging — Paste your API response here to instantly spot missing commas, unclosed brackets, or trailing commas.
- ● Minify for production — Remove whitespace from config files to save bandwidth. A 50 KB formatted JSON might become 20 KB minified.
- ● Tab key works — Press Tab in the input area to insert spaces, just like a code editor.
- ● Safe for sensitive data — Use this for API keys, tokens, and config files. Nothing leaves your browser.