Free online JSON key sorter. Recursively sort all object keys alphabetically for consistent, predictable JSON output. Runs locally in your browser, no data uploaded.
100% Local
How to Use the JSON Sorter
Paste any JSON object into the input box. Click Sort Keys and all object keys are sorted alphabetically at every nesting level, including inside arrays. Use Clear to reset both panels.
How key sorting works
Sorts object keys alphabetically at every nesting level
Recurses into objects nested inside arrays
Preserves array element order — only keys are sorted
Validates the JSON before sorting to catch syntax errors
Features
Full recursive sort — no depth limit
Produces deterministic, reproducible output
Handles large JSON objects with thousands of keys
All processing runs locally in your browser. Your data is not uploaded to any server.