JSON Key Sorter
Sort JSON object keys alphabetically — optionally through every level of nesting. Sorting happens in place.
Why sort JSON keys?
Sorted keys make JSON easier to diff, easier to review in code review, and deterministic for hashing or caching (the same data always serializes to the same string). Array order is preserved — only object keys are rearranged, since array order is usually meaningful while key order is not.
FAQ
Is sorting case-sensitive?
Keys are compared case-insensitively using locale-aware comparison, so User and user sort next to each other.
Does it change my data?
No — only key order changes. Values, types and array order are untouched.
Is my data uploaded?
No. Everything runs in your browser.
JSON Key Sorter — FAQ
Is JSON Key Sorter free to use?
Yes. It is completely free, with no signup, no installation and no usage limits.
Is my data uploaded to a server?
No. The tool runs entirely in your browser — the data you paste or upload never leaves your device.
Does it work on mobile devices?
Yes. It works in any modern desktop or mobile browser, with nothing to install.