Does it sort keys at every nesting level?

Yes. Keys are sorted recursively through every nested object. Array order is preserved by default so element positions are not disturbed.

Why would I sort JSON keys?

Sorting keys into a stable order makes JSON deterministic, so two equivalent documents diff cleanly in version control and config files stay tidy regardless of the order they were written in.

Is my JSON uploaded anywhere?

No. Sorting runs entirely in your browser as JavaScript. Your JSON is never sent to a server.

JSON Key Sorter

Sort JSON object keys alphabetically and recursively — in your browser.

JSON key sorter

Paste any JSON and get it back with every object’s keys sorted alphabetically and recursively. Choose ascending (A to Z) or descending (Z to A) order, set your indentation (2 or 4 spaces, a tab, or minified), and optionally sort string-only arrays too.

Array order is preserved by default, so only object keys move. Sorting keys into a stable order makes JSON deterministic and easy to diff. Everything runs in your browser — your JSON never leaves your device.