JSON Formatter
Format messy JSON into clean, indented, readable structure — or minify it back down.
Making JSON legible
JSON that arrives from an API or a log is often a single unbroken line, impossible to read and worse to debug. Formatting it adds consistent indentation and line breaks so the structure becomes visible — you can see the nesting, find the field you need, and spot where a bracket does not match. This pretty-prints your JSON and can collapse it back to a compact single line when you are done.
Paste the JSON and it is reformatted instantly.
It validates as it formats
A useful side effect is that formatting only succeeds on valid JSON, so if it will not format, you have a syntax error — a trailing comma, a missing quote, a stray bracket — and the position of the failure usually points you straight to it. For sharing or storing, the minified form strips every unnecessary space; for reading and editing, the indented form is what you want. It all happens in your browser, so even sensitive API responses stay on your machine.
Questions & answers
Why won't my JSON format?
It is not valid JSON — usually a trailing comma, a missing quote or an unmatched bracket. The error position points to the problem.
What is the difference between formatting and minifying?
Formatting adds indentation to make JSON readable; minifying strips whitespace to make it as small as possible for storage or transfer.
Is my JSON uploaded?
No. It is processed in your browser, so sensitive data stays on your machine.