JSON Sort Keys

Alphabetically sort object keys recursively for stable diffs, cleaner configs, and predictable test fixtures. Paste JSON and click Run.

  • Runs entirely in your browser
  • No data stored or sent to a server
  • Free forever — no signup
  • Instant conversion

Input and Output

Use the interactive encoder and decoder on this page to process your text.

Learn more about sorting JSON keys

How to Sort JSON Keys Alphabetically

JSON Key Sorting

When to Sort JSON Keys

Sort keys when you need stable git diffs, deterministic test snapshots, or consistently ordered config files across environments.

Real-World Examples

Unordered config keys reordered alphabetically at every nesting level

API fixture files normalized before committing to version control

Nested objects in arrays sorted recursively

Common Mistakes

  • Expecting array element order to change (arrays keep insertion order)
  • Assuming key order affects JSON semantics — it does not for parsers
  • Sorting extremely large files in the browser without streaming

Developer Tips

  • Sort keys before diffing JSON in pull requests
  • Combine with formatting for readable, ordered output

Frequently asked questions

Are array items reordered?

No. Only object keys are sorted. Array element order is preserved.

Does sorting change JSON values?

No. Only key order changes. Parsed values remain identical.

Is sorting recursive?

Yes. Keys are sorted at every nested object level in the document.