Paste minified or unformatted JSON and instantly get a clean, indented, human-readable result. Choose 2-space, 4-space, or tab indentation.
Real-time JSON validation with precise error messages. Pinpoint syntax mistakes instantly and auto-fix common issues like single quotes.
Explore nested JSON in an interactive collapsible tree. Minify JSON for production to reduce payload size. Download results as a .json file.
All processing runs entirely in your browser. No data is ever sent to a server. Safe for sensitive or confidential JSON data.
A JSON formatter takes raw or minified JSON text and reformats it with consistent indentation and line breaks, making it easy to read and debug. It also validates whether the JSON is syntactically correct.
Yes. This tool processes all JSON entirely in your browser using JavaScript. No data is transmitted to any server, making it safe for API keys, tokens, and private data.
Click "Validate" to see the exact error location. Common issues include single quotes instead of double quotes (use "Fix Quotes"), trailing commas, or missing brackets. The error message shows the exact position of the problem.
Yes. You can upload .json or .txt files directly using the upload button. The formatter handles large files efficiently in-browser without any size limit imposed by a server.