JSON Formatter & Validator
Paste your JSON to format, minify, or validate it. Errors show exact position. Runs entirely in your browser.
Indent:
Input JSON
Output
About this JSON formatter
This tool uses the browser's native JSON.parse() to validate your input, then JSON.stringify() with configurable indentation to produce clean, readable output. No libraries required.
Common use cases: formatting API responses before logging them in test reports, validating test fixture files, or minifying JSON configuration before committing to your repository.