Sort JSON Keys Online.

Sort JSON keys alphabetically

A sort JSON keys tool reorders object properties so JSON output is easier to scan, compare, review, and commit. Paste JSON above, choose A to Z or Z to A, and the tool outputs valid JSON with sorted keys. It runs entirely in your browser, so private data never leaves your device.

How to sort JSON keys in three steps

1. Paste JSON into the input or load the sample.
2. Choose sort options - A to Z, Z to A, recursive nested keys, and array handling.
3. Sort and export - copy the result or download sorted JSON.

Recursive nested JSON sorting

Most real JSON has nested objects. With recursive sorting enabled, the JSON key sorter sorts keys inside every object, not just the top level. That makes API responses, package metadata, translation files, configuration files, and test fixtures more stable and easier to review in diffs.

Preserve arrays or sort arrays too

Array order often has meaning, so this tool preserves arrays by default. If you intentionally want deterministic array order, choose Sort arrays too. Objects inside arrays can still have their keys sorted recursively while the array items stay in their original order.

Key order carries no meaning — that is why sorting is safe

The JSON specification defines an object as an unordered set of name/value pairs. These two documents are the same object, and every parser will agree:

{ "name": "Ada", "role": "admin", "id": 1 }

{ "id": 1, "name": "Ada", "role": "admin" }

Sorting keys rewrites the text without touching the data. It is always safe.

The real payoff: diffs that mean something

Two services serialise the same object with keys in different orders — one uses a hash map, the other preserves insertion order. Nothing has changed, but git diff paints the whole file red and green and code review becomes useless.

Sort both sides first and the noise disappears; only genuine changes remain. Sorting also makes JSON deterministic, which matters when you are checksumming a payload, using it as a cache key, or committing a lockfile that should not churn on every install.

For a one-off comparison you do not even need to sort — the JSON diff tool compares structurally and ignores key order for you.

Sort keys in code

# Python — sort_keys handles nesting automatically
import json
print(json.dumps(data, sort_keys=True, indent=2))

# Command line
jq -S . data.json > sorted.json

JavaScript has no built-in equivalent — JSON.stringify follows insertion order — so you have to rebuild each object with sorted keys recursively. That is one reason a tool is handy.

Be careful sorting arrays

Object keys are unordered; array items are not. [1, 2] is genuinely a different value from [2, 1], so sorting an array does change your data.

Only sort arrays that truly represent unordered sets — tags, permissions, scopes, feature flags. Never sort ranked results, ordered steps, or a time series.

Why sort JSON keys?

Sorted JSON is useful when you want stable Git diffs, readable config files, normalized API examples, or deterministic generated output. You can combine this page with JSON Formatter for readable indentation, JSON Minifier for compact output, or JSON Diff to compare two normalized JSON files. Learn more in the guide on how to sort JSON keys.