How to use this tool
Paste your JSON on the left. It is validated instantly — if something is wrong you get the exact line and column. Choose Beautify (with 2/4 spaces or tabs) or Minify, optionally sort the keys, then copy or download the result.
Why use a JSON formatter
JSON is the standard format for APIs and config files, but raw or minified JSON is hard to read and easy to break with a missing comma or bracket. A formatter makes it readable, confirms it is valid, and points to errors so developers can fix them quickly. Because this tool runs entirely in your browser, you can safely format API responses or config that contain private data without sending anything to a server.
Frequently asked questions
What does this JSON formatter do?
It beautifies (pretty-prints) JSON with your choice of indentation, minifies it to a single line, validates it, and highlights the syntax. If the JSON is invalid, it shows the error with the exact line and column.
Is my JSON sent to a server?
No. All formatting and validation happen in your browser on your device, so even sensitive JSON stays private.
What is the difference between beautify and minify?
Beautify adds indentation and line breaks so JSON is easy to read. Minify removes all unnecessary whitespace to make the smallest possible single-line JSON for transfer or storage.
Can it sort the keys?
Yes. Turn on 'Sort keys' to alphabetically order object keys (recursively), which is handy for diffing or comparing JSON.