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.

Does sorting reorder my arrays?

No, not by default. Array element order is meaningful, so positions are preserved. You can optionally enable sorting of string-only arrays, but arrays of objects or mixed types are always left in place.

How are keys compared — is it case-sensitive?

Keys are compared as strings, which orders uppercase letters before lowercase in standard code-point order. Pick ascending (A to Z) or descending (Z to A) to set the direction.

What indentation options are there?

You can output with 2 spaces, 4 spaces, a tab, or fully minified onto a single line. The values themselves are unchanged regardless of indentation.

Does sorting change any values?

No. Only the order of object keys changes. Every value — strings, numbers, booleans, null, nested structures — is preserved exactly.

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 — Gera Tools

JSON key sorter

The same JSON data can be written with its keys in any order, which makes two otherwise-identical files diff noisily and config files drift over time. This tool returns your JSON with every object’s keys sorted alphabetically and recursively, giving you a single canonical ordering that diffs cleanly.

How it works

The sorter parses your JSON, then rebuilds it: for each object it lists the keys, sorts them as strings (ascending A→Z or descending Z→A), and re-emits them in that order, descending recursively into every nested object. Arrays keep their order by default, since element position is usually significant; you can optionally sort string-only arrays as well. Finally the result is serialised with your chosen indentation — 2 spaces, 4 spaces, a tab, or minified.

Example

This input:

{ "name": "api", "auth": { "type": "key", "id": 7 } }

sorted ascending becomes:

{
  "auth": {
    "id": 7,
    "type": "key"
  },
  "name": "api"
}

auth now precedes name, and inside auth the keys are sorted too. Sorting keys into a stable order makes JSON deterministic and easy to diff. Everything runs in your browser — your JSON never leaves your device.