JSON Formatter & Validator — Free Online Tool

FREENo Sign-up100% Browser-BasedPrivate

Paste your JSON below. Format for readability, Minify for compact output, or Validate to check syntax.

Formatted JSON appears here after clicking Format
All processing happens in your browser — nothing sent to any server. Back to all tools

Frequently Asked Questions

What is JSON?
JavaScript Object Notation — a lightweight text format for data exchange.
Why format JSON?
Raw API responses are minified. Formatting adds indentation for readability.
What does Validate do?
Parses the JSON and reports any syntax errors with their location.
Is my JSON sent anywhere?
No — formatting uses the built-in browser JSON parser.

Related Free Tools

Base64 Encoder/DecoderWord CounterCase Converter

Explore All 20 Free Tools

Calculators, PDF tools, image editors, text tools, and more — all free.

Browse All Tools