JSON Formatter & Validator
Paste your JSON to format, validate, minify, or explore as a tree. Everything runs in your browser — nothing is sent to any server.
Input
1
Output
Formatted output will appear here…
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used everywhere — APIs, config files, databases, and more. It's human-readable and easy for machines to parse.
What does this tool do?
- Format / Pretty Print — Adds proper indentation and line breaks to make JSON readable
- Minify — Strips all whitespace to create the smallest possible output
- Validate — Checks if your JSON is valid and shows the exact error location
- Tree View — Explore your JSON as a collapsible tree structure
- Syntax Highlighting — Color-coded keys, strings, numbers, booleans, and null values
- Download — Save formatted JSON as a .json file
100% Private
Your data never leaves your browser. All formatting and validation happens locally using JavaScript. No server calls, no tracking of your JSON content.