JSON Formatter
Format, minify, validate, and beautify JSON data
Beautify messy JSON, minify it for transport, or validate that it parses at all, all in one place. The formatter pinpoints syntax errors so you can fix a trailing comma or unmatched bracket quickly, then pretty-prints with consistent indentation that's easy to read and diff.
How to use JSON Formatter
- Paste your raw or minified JSON into the input.
- Choose to format (pretty-print) or minify the output.
- Read any validation errors that highlight where parsing failed.
- Copy the cleaned-up JSON for use in your code or API calls.
Frequently asked questions
Why does my JSON show an error?
Common causes are trailing commas, single quotes instead of double quotes, unquoted keys, or comments, none of which are valid JSON. The validator reports the position so you can correct it.
What's the difference between formatting and minifying?
Formatting adds indentation and line breaks for readability; minifying strips all unnecessary whitespace to make the payload as small as possible for network transfer.
Is large JSON handled?
Yes, parsing runs in your browser. Very large documents depend on your device's memory, but typical API payloads format instantly and never leave your machine.
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