Developer ToolsFree

JSON Formatter & Validator

Format messy JSON into readable, indented code. Validate JSON syntax and detect errors with clear error messages. Also minify JSON to a single line.

How to use the JSON Formatter

  1. Paste your JSON into the input box on the left.
  2. Click Format to pretty-print with indentation.
  3. Click Minify to compress to a single line.
  4. Copy the result with the copy button.

Frequently Asked Questions

Can this validator detect JSON errors?▼
Yes. It shows the exact error message and location when your JSON is invalid.
What is JSON minification?▼
Minification removes whitespace to produce compact JSON, reducing file size for APIs and storage.
Is my JSON data sent to a server?▼
No. All formatting and validation is done in your browser.