Free, runs entirely in your browser — no sign-up, no file upload to a server.
What does JSON Formatter do?
It formats, validates, and minifies JSON, with syntax highlighting to make nested structures easy to read.
How do I use it?
Paste your JSON — invalid syntax is flagged with a clear error, and valid JSON can be pretty-printed or minified.
Is my input sent anywhere?
Everything runs in your browser — nothing you type or paste is sent to a server.
How do I report a problem or request a feature for this tool?
Use the Contact / Feedback page — select "JSON Formatter" as the related tool so we know exactly which tool you mean, then describe the bug or the feature you'd like to see.