paste your json and instantly format, validate, or minify it. see errors with line numbers.
formatted output will appear here
JSON Formatter and Validator takes messy, minified, or broken JSON and formats it into clean, readable output with proper indentation. Paste your JSON and instantly see it beautified, or click minify to compress it for production use.
The built-in validator checks your JSON for syntax errors and shows exactly where the problem is with line numbers. No more guessing which bracket is mismatched or where the missing comma is.
The tool runs entirely in your browser. Your data is never sent to a server, making it safe for API responses containing user data, configuration files with credentials, and any other sensitive JSON.
Paste your JSON
Paste raw JSON into the input area. It can be minified, poorly formatted, or even contain syntax errors.
Format or minify
Click Format to beautify with proper indentation, or Minify to compress to a single line.
Check for errors
If your JSON has syntax errors, the validator highlights the exact line and character where the problem occurs.
Copy the result
Copy the formatted or minified output to your clipboard with one click.
API debugging
Format API response bodies to read and analyze the data structure.
Config file editing
Beautify JSON configuration files for easier reading and editing.
Data validation
Verify that JSON payloads are syntactically valid before sending them to an API.
Code reviews
Format JSON fixtures and test data for readable code reviews.
Documentation
Beautify JSON examples for API documentation and README files.
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