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Compare JSON

Fast comparePrivateDeep nested

Compare two JSON objects instantly and highlight added, removed, and changed values. Perfect for API debugging, config reviews, data migrations, and regression checks.

  • Compare JSON fast
  • Highlight differences clearly
  • Deep nested comparison
  • Private browser processing
Original JSON

Paste both JSON objects to compare changes.

Updated JSON

Paste both JSON objects to compare changes.

Differences will appear here

Paste both JSON objects, then click Compare JSON.

Ctrl+Enter Compare JSON

Paste JSON in both panels, then run Compare — or use Load sample pair above.

Compare Two JSON Objects Online

Find differences between two JSON objects instantly. Highlight added, removed, and changed values with clear color-coded results for faster debugging and reviews.

  • Compare JSON fast
  • Highlight differences clearly
  • Deep nested comparison
  • Private browser processing

Use Cases

API Responses
Compare old vs new payloads and spot added, removed, or changed fields after a deploy.
Config Changes
Review environment or settings updates and verify exactly what changed between versions.
Regression Testing
Catch unexpected data changes in snapshots or test fixtures by comparing expected vs actual output.
Data Migration
Verify transformed records by comparing source vs destination JSON and confirming the intended changes.

How to Use

  1. Paste original JSON.
  2. Paste updated JSON.
  3. Click Compare JSON.
  4. Review highlighted changes.
  5. Filter results if needed.

Features

  • Deep JSON comparison
  • Added / removed / changed detection
  • Color-coded results
  • Path-level visibility
  • Browser-only private processing
  • Mobile friendly

Frequently Asked Questions

Is this free?

Yes. This compare JSON tool is free to use.

Is my data uploaded?

No. Comparison runs locally in your browser—your JSON is not uploaded to a server.

Can it compare nested objects?

Yes. Nested objects are compared recursively so differences appear at specific paths.

What do colors mean?

Green indicates added values, red indicates removed values, and yellow/amber indicates changed values.

Can I compare arrays?

Yes. Arrays are compared too. Note that array order can affect results because arrays are ordered by index.

What if JSON is invalid?

Fix syntax errors first, then compare. Use the JSON Validator or Fix Invalid JSON for guided help.

Does it work on mobile?

Yes. The compare workflow is mobile-friendly with stacked inputs, a prominent Compare button, and easy-to-scan results.

Can I share results?

You can share a link by using Share URL, which encodes both inputs in the page URL hash for quick reopening.

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