✨ JSON Formatter
Beautify, validate, or minify JSON entirely in your browser — turn a tangled one-liner into readable, indented structure, or collapse a pretty file back down for transport.
🧹 Format, Validate & Minify
What is a JSON Formatter?
A JSON formatter re-indents JSON so its nesting is easy to read and review, and it doubles as a validator: if the text parses, it is valid. Minifying does the reverse, stripping whitespace for compact payloads.
It is a daily helper when you are debugging API responses, editing config files, or preparing data for a commit — readable when you work, compact when you ship.
❓ Frequently Asked Questions
Does this validate my JSON?
Yes. The formatter parses your input with the browser's own JSON parser, so anything it can beautify or minify is guaranteed to be valid JSON. If the input is malformed, you get a plain-language error describing what went wrong instead of a broken result.
What is the difference between formatting and minifying?
Formatting (beautifying) adds consistent indentation and line breaks so a human can read and diff the structure easily. Minifying strips every optional space and newline to produce the smallest single-line form, which is what you want for payloads sent over the network or embedded in code.
Is my JSON uploaded anywhere?
No. Parsing, pretty-printing, and minifying all happen locally in your browser. Your data never leaves the page, so it is safe to paste API responses, config files, or other snippets you would rather not send to a server.
Why am I getting an 'Unexpected token' error?
That error means the text is not valid JSON. Common causes are trailing commas, single quotes instead of double quotes, unquoted keys, comments (JSON does not allow them), or a stray character copied from a log. Fix the highlighted spot and re-run to get clean output.