Hub JSON Formatter
🧾

JSON Formatter & Validator

Paste JSON to instantly format, validate, or minify it. Live validation with friendly error messages.

Paste JSON to start
Input
Output
Advertisement
How to use
  1. Paste raw or minified JSON from an API response, config file, or database export into the input panel.
  2. Click Format to pretty-print, Minify to compress, or Sort Keys to alphabetise object keys.
  3. Copy the formatted output or click Download to save it as a .json file.
FAQ

Paste your JSON in and the validator will pinpoint the exact line and position of the error. Common causes: trailing commas (valid in JS but not JSON), single quotes instead of double quotes, unescaped special characters in strings, missing commas, or mismatched brackets.

Minify strips all whitespace and line breaks. For a typical 100KB formatted JSON, minification reduces it to ~60–70KB — ideal for API responses, localStorage, and config files where size matters.

Yes — all formatting and validation runs in your browser. Your JSON is never transmitted to any server, logged, or stored. Safe for API credentials, user data, and proprietary business data.