Browser utility · No upload
JSON Formatter
Format, validate, minify, and sort JSON — free, private, and instant.
Runs locally in your browser — your input is never uploaded or stored.
About this tool
JSON Formatter lets you format, validate, minify, and sort JSON without installing an app or creating an account. Turn dense JSON into readable output and pinpoint syntax errors instantly.
Pretty-print API responses for debugging, minify JSON before shipping it, or alphabetically sort keys to make diffs and config files easier to review.
How it works
- Enter or choose your values
- Review the instant result
- Copy or download the result
Frequently asked questions
How do I use JSON Formatter?
Enter or choose your input in the tool above. The result updates immediately or appears when you select the action, ready to copy or download.
Will it show me where my JSON is broken?
Yes. Invalid JSON is flagged with the parser's error message so you can jump to the missing comma, bracket, or quote.
Is JSON Formatter free, and is my data private?
Yes. JSON Formatter is free with no account or watermark, and it runs entirely in your browser so your input is never uploaded, stored, or shared.
Does it work on phones and tablets?
Yes. It works in current browsers on Android, iPhone, iPad, Windows, macOS, and Linux.