JSON Formatter
Format, validate, beautify, and minify JSON data online. Paste raw or minified JSON and get properly indented, readable output with syntax highlighting. The tool also validates JSON structure and reports errors with line numbers. Useful for debugging APIs, formatting configuration files, and making JSON data readable. Works entirely in your browser.
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How to Use JSON Formatter
- Paste JSON data into the input field.
- Click Format to beautify or Minify to compress.
- Copy the formatted output.
Why Use JSON Formatter
JSON data from APIs, logs, and configuration files is often minified or malformed, making it difficult to read and debug. This tool instantly formats JSON with proper indentation, validates the syntax, and highlights errors with line numbers — saving developers time when working with JSON data.
Frequently Asked Questions
What if my JSON is invalid?
The formatter will highlight the error and show the line where the syntax issue occurs, helping you fix it quickly.
Can I minify JSON?
Yes. The tool can both beautify (add indentation) and minify (remove whitespace) JSON data.
Is there a file size limit?
The tool works with JSON text pasted into the browser. Very large JSON files may take longer to format depending on your browser's performance.
Is my JSON data uploaded?
No. All formatting and validation happens locally in your browser. Your JSON data never leaves your device.
Does it validate JSON syntax?
Yes. The tool validates JSON syntax and reports any errors with line numbers to help you debug issues.