JSON Formatter & Validator - Beautify JSON Online Free

Format, validate and beautify JSON data online. Tree view, error detection, minify. Free and processed locally in your browser.

Free Online JSON Formatter & Validator

Paste your JSON and instantly format, validate or minify it. Perfect for developers debugging API responses or config files. Everything runs locally in your browser.

Features

  • Pretty-print with 2-space indentation
  • Syntax validation with precise error messages
  • Minify to remove whitespace for smaller payloads
  • Syntax-highlighted output