What does the JSON formatter do?

It takes minified or messy JSON and formats it with proper indentation, making it easy to read. It also validates your JSON and highlights any syntax errors.

How do I validate JSON?

Simply paste your JSON into the input field. The tool automatically validates it and shows any errors with line numbers. Valid JSON will be formatted and displayed in the output.

Can I minify JSON too?

Yes! You can switch between formatted (pretty) and minified output. Minified JSON removes all whitespace, making it smaller for storage or transmission.

All tools

JSON Formatter

Format, validate, and minify JSON data

Upload file

Input JSON

Indent:

How does it work?

Paste your JSON or upload a file
Click Format to prettify or Minify to compress
Copy the result or download as a file

Privacy: All processing happens in your browser. Your data never leaves your device.

Tip: The formatter also validates your JSON - any syntax errors will be shown with their location.

About JSON Formatter

Minified or messy JSON is almost impossible to read or debug. This free JSON formatter pretty-prints it with proper indentation and syntax highlighting, and validates it so you instantly spot a missing comma or bracket. It's a daily tool for anyone working with APIs or config files. Everything runs in your browser, so your data is never uploaded.

How to use JSON Formatter

1
Paste JSON
Paste your raw or minified JSON data in the input area.
2
Format and validate
The tool automatically formats, indents, and validates your JSON with syntax highlighting.
3
Copy formatted JSON
Copy the formatted JSON to clipboard or download it as a file.

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