JSON Utility

JSON Formatter & Repair Tool

Auto-fix, pretty print, and explore JSON - client-side.

Auto-fix On

What this tool does

Paste JSON and get a clean, readable version in seconds.

It fixes common formatting issues, then pretty-prints the result and shows a tree view for quick inspection.

Ready to process.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight text format for exchanging data between systems. It is easy for humans to read and write, and easy for machines to parse. Learn more on Wikipedia.

How to use this tool

  1. Paste or type your JSON into the input box.
  2. Leave auto-fix on to repair common issues, or toggle it off for strict parsing.
  3. Click "Process & Pretty Print" to format the JSON.
  4. Use the tree view or copy button to inspect and reuse the output.

Why use this tool

  • Turns messy API responses or logs into readable, structured JSON.
  • Highlights keys and values and offers a tree for quick navigation.
  • Auto-fix helps recover JSON that would otherwise fail validation.
  • Copy clean output for debugging, documentation, or sharing.