JSON Formatter
DeveloperFormat messy JSON with proper indentation, minify it for production, and catch syntax errors with clear messages. Runs entirely in your browser.
Runs entirely in your browser — nothing is uploaded
Frequently asked questions
What's the difference between beautify and minify?+
Beautify adds indentation and line breaks for readability; minify strips all whitespace to make the smallest possible JSON for production.
Will it tell me where my JSON is broken?+
Yes — if parsing fails, you'll see the parser's error message describing the problem.
Is my data sent to a server?+
No. Formatting JSON happens entirely in your browser using built-in web APIs — nothing is uploaded, stored, or logged.