JSON Diff

How it works

How to use the JSON Diff

1. Paste or open two files

   Edit the original on the left and the modified version on the right. Both sides are editable.

2. Normalize (optional)

   Press Normalize to format both sides and sort keys, so only real data changes remain.

3. Choose a layout

   Switch between side-by-side and unified views, and collapse unchanged regions.

Getting a clean diff

Two JSON files with identical data can still produce a noisy diff if one is minified or has keys in a different order. The Normalize button rewrites both documents with consistent 2-space indentation and alphabetically sorted keys, so the diff shows only genuine changes. For a list of changes by JSON path, try JSON Compare.

Built for developers

Why developers use it

• Private by design

  Runs 100% in your browser. Nothing you paste is uploaded, logged or stored on a server.

• Instant results

  Output updates as you type, with precise error locations when something is wrong.

• Works offline

  Once loaded, the tool keeps working without a connection. Install it as an app if you like.

• Free, no sign-up

  No accounts, no limits, no watermarks.

FAQ

Frequently asked questions

Keep going

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• JSON ValidatorFind and fix JSON syntax errors
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• JSON CompareFind semantic differences between two JSON documents
• JSON EditorEdit JSON with live validation
• JSON SorterSort JSON keys alphabetically
• JSON to CSVConvert JSON arrays to CSV and CSV back to JSON
• JSON to XMLConvert JSON to XML and XML to JSON

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