JSON Sort Keys

The JSON Sort Keys tool reorders the keys of every object in your document alphabetically, all the way down through nested structures. Consistent key order makes two JSON files diff cleanly, snapshots stay stable, and version control noise disappears. Array element order is left untouched because arrays are ordered by design.

• Recursively sorts keys in every nested object
• Ascending (A to Z) or descending (Z to A) ordering
• Leaves array element order intact, since arrays are inherently ordered
• Optional case-insensitive sorting for mixed-case keys
• Produces deterministic output ideal for diffing and snapshots
• Preserves all values, types, and duplicate-free structure

1. 1

   Paste your JSON

   Add the object or array whose keys you want to normalize.

2. 2

   Pick a direction

   Choose ascending or descending, and case-sensitive or case-insensitive ordering.

3. 3

   Sort

   Keys are reordered recursively while values and array order stay the same.

4. 4

   Copy the canonical output

   Use the sorted JSON for stable diffs, commits, or golden-file tests.

• Making two exported JSON files diff cleanly regardless of original key order
• Producing canonical JSON before hashing or signing
• Stabilizing test snapshots so unrelated reorderings do not fail CI
• Normalizing config files so reviews focus on real changes
• Comparing objects from different serializers that emit keys in different orders