Free online tool

Format JSON Online

Clean up API responses, config files, logs, and JSON snippets into readable formatted output.

Open JSON Formatter & Validator

Best for

  • Debug API JSON
  • Beautify minified payloads
  • Validate JSON before saving

How it works

  1. Step 1: Paste JSON
  2. Step 2: Choose indentation
  3. Step 3: Format or minify the output

Frequently asked questions

Does this execute JavaScript?

No. Formatting does not execute the pasted code.

Can I format large JSON?

The formatter protects your browser with a practical size limit.

Use the full tool

This landing page explains the workflow. The actual interactive tool is available at https://fixelium.com/dev/json-formatter.