Developer Tools
JSON Formatter
Paste minified or messy JSON and get a clean, indented, readable result instantly — free and browser-based.
No uploads — browser onlyInstant result
Indent size
JSON Input
How to format JSON
- Paste your JSON into the input area.
- Choose your preferred indent size (2 or 4 spaces).
- Click Format JSON to prettify, or use Minify to collapse it.
- Copy the result to your clipboard with one click.
Privacy — your data stays local
Everything runs in your browser with the native JavaScript JSON API. No data is ever sent to a server.
Frequently Asked Questions
What is the difference between formatting and minifying?
Formatting adds whitespace and indentation to make JSON human-readable. Minifying removes all unnecessary whitespace to make the file as small as possible for production use.
Does formatting change my data?
No. Formatting only changes whitespace. The data, keys, and values remain identical.
Can I format nested JSON?
Yes — deeply nested objects and arrays are all correctly indented.
What does a JSON syntax error look like?
An error message will appear below the input showing exactly where the parser failed, e.g. "Unexpected token at position 42".