JSON Formatter & Validator
Format, beautify, validate and minify JSON instantly. Syntax highlighting, tree view, error detection — all in your browser.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used for data interchange. It is human-readable and easy to parse for machines.
JSON Formatting
Formatting or beautifying JSON adds proper indentation and line breaks to make it easy to read and debug. Our formatter supports 2 and 4 space indentation.
JSON Validation
JSON validation checks if your JSON is syntactically correct. Our validator instantly detects errors and highlights exactly where the problem is.
Frequently Asked Questions
How do I format JSON online?
Paste your JSON into the input box and click 'Format / Beautify'. The tool will instantly format your JSON with proper indentation.
Is my JSON data safe?
Yes — 100%. All processing happens entirely in your browser. Your JSON data is never sent to any server.
How do I validate JSON?
Paste your JSON and the validator checks it in real-time. If there's an error, it shows the exact error message and location.
What is JSON minification?
Minification removes all whitespace and line breaks from JSON to reduce file size. Click 'Minify' to compress your JSON.
Can I upload a JSON file?
Yes — click 'Upload File' to load any .json file directly into the formatter.