JSON Formatter & Validator
Free, instant, runs in your browser. Your data never leaves your device.
What is a JSON Formatter?
A JSON formatter (also called a JSON beautifier or JSON prettifier) takes minified or unformatted JSON and adds proper indentation and line breaks to make it human-readable. It also validates your JSON syntax, flagging any errors like missing commas, unclosed brackets, or invalid values.
How to Use This Tool
- Paste your raw or minified JSON into the left text area.
- Click the Convert button.
- The formatted, indented JSON appears on the right.
- Click Copy to copy the result to your clipboard.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write and easy for machines to parse and generate. JSON is widely used in REST APIs, configuration files, and data storage.
FAQ
Is my data safe?
Yes. All formatting happens directly in your browser using JavaScript. Your data is never sent to any server.
What JSON is supported?
Any valid JSON — objects, arrays, strings, numbers, booleans, and null values. Nested structures and arrays of objects are fully supported.