JSON Formatter & Validator
Paste raw or minified JSON to format it with syntax highlighting, validate it for errors, or minify it for production — everything runs in your browser.
Frequently Asked Questions
What is JSON formatting?
JSON formatting (or beautification) takes compressed or minified JSON text and adds proper indentation, line breaks, and spacing to make it human-readable. A well-formatted JSON file shows nested objects and arrays clearly, making debugging and code review much easier than staring at a single long line.
How do I validate JSON?
Paste your text into the formatter above and click Format JSON. The tool attempts to parse it using the browser's built-in JSON parser. If the JSON is invalid, you'll see a specific error message showing what went wrong and approximately where — such as an unexpected token or a missing closing bracket.
What does JSON minification do?
Minification removes all unnecessary whitespace, line breaks, and indentation from a JSON file to reduce its byte size. This is useful when sending JSON over a network API or storing it in a database, since smaller payloads mean faster transfers. The data structure and all values remain completely unchanged — only the formatting is stripped away.