What is a JSON Formatter?
A JSON formatter is an online developer utility that makes JavaScript Object Notation (JSON) easier to read by adding consistent indentation and line breaks. It is useful when working with REST APIs, configuration files, application data and debugging tools.
What does JSON validation do?
JSON validation checks whether text follows the JSON syntax rules. This tool uses your browser's built-in JSON parser to detect invalid syntax and display an error message. Valid JSON can then be formatted or minified.
Why minify JSON?
Minification removes unnecessary spaces and line breaks without changing the underlying JSON data. It can make JSON payloads smaller and more convenient to transmit or embed.
Is my JSON data uploaded?
No. Formatting, validation, sorting, and minification run in your browser using JavaScript. The JSON you paste is not submitted to this website by the tool. Avoid pasting passwords, access tokens or other secrets into any online tool.
Frequently asked questions
Is this JSON formatter free?
Yes. You can format, validate, minify, copy and download JSON for free without creating an account.
Can I validate a JSON file?
Yes. Open the file in a text editor, copy its contents into the input box, and select Validate JSON or Format JSON.
Does the tool support large JSON files?
It can process JSON supported by your browser and available device memory. Very large files may take longer or use significant memory.
What happens if my JSON is invalid?
The tool displays a syntax error from the browser's JSON parser. Review the indicated message, correct the input, and validate it again.
Can I sort JSON object keys?
Yes. Select “Sort object keys” before formatting or minifying. Object keys are sorted alphabetically; array item order is preserved.