Format, beautify, validate, sort and minify JSON online for free. Clean up API responses, config files and data without sending anything to a server.
🔒 Your JSON stays on your device and is never uploaded.
Paste JSON into the editor and choose Format JSON. This online JSON formatter validates the syntax, adds consistent indentation and shows useful structure statistics. Choose Minify when you need a compact payload for storage or transport.
Catch missing commas, quotes and brackets with a clear error plus an approximate line and column.
Choose two spaces, four spaces or tabs. Sort object keys recursively when predictable ordering helps.
Everything runs locally in your browser. Copy or download the result without an account or upload.
A JSON formatter adds indentation and line breaks to compact or inconsistent JSON, making nested objects and arrays easier to scan, review and debug.
Use the error message below the input editor to find the approximate line and column. Common problems include single quotes, trailing commas, unquoted keys and missing brackets.
Minification removes unnecessary spaces and line breaks without changing the data, reducing the size of an API payload or file.
It changes object key order only. Values and array order stay intact.
No. Parsing, formatting and validation happen locally in your browser.