JSON Formatter

Format, validate, and minify JSON in your browser.

Runs entirely in your browser — files never uploaded

Input JSONUpload .json

Indent

How to use JSON Formatter

1. Paste your JSON. Paste it into the input box, or upload a .json file.
2. Choose an action. Format (pretty-print), minify (one line), or validate.
3. Copy or download the result. Use the buttons below the output to copy or save the file.

FAQ

Where is my data sent?

Nowhere. JSON is parsed and formatted entirely in your browser.

What if my JSON is invalid?

You'll see the parser error with the line/column when possible.

Is there a size limit?

Soft limit of 5 MB to keep your browser responsive.