Make JSON readable.
Paste JSON to beautify it with clean indentation, minify it to one line, or catch the exact syntax error — all in your browser.
What is the JSON Formatter?
BYAFT's JSON Formatter beautifies, minifies and validates JSON right in your browser. Paste raw JSON to format it with clean indentation, minify it for transport, or get the precise error when it won't parse — no sign-up, and nothing uploaded.
It is the quickest way to read an API response, tidy a config file or check that JSON is valid before you ship it.
How to use the JSON Formatter
- 1Paste your JSONDrop raw or messy JSON into the input.
- 2Beautify or minifySwitch between pretty-printed and minified output.
- 3Copy the resultCopy the formatted JSON back out.
What you can use it for
- Reading a hard-to-scan API response
- Minifying JSON before sending it
- Finding the syntax error in invalid JSON
- Tidying a configuration file
Frequently asked questions
Is my JSON uploaded?
No. Formatting and validation happen entirely in your browser; your JSON never leaves your device.
Will it tell me why my JSON is invalid?
Yes. If the JSON cannot be parsed, the tool shows the parser error so you can find and fix the problem.
Is it free?
Yes — formatting, minifying and validating JSON is free with no sign-up.