JSON Compare

Compare two JSON objects side-by-side and spot differences instantly. Free online JSON diff viewer for developers.

Original JSON (Left)

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{
  "id": 1,
  "name": "Product A",
  "price": 100
}

{
  "id": 1,
  "name": "Product A",
  "price": 100
}

Modified JSON (Right)

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{
  "id": 1,
  "name": "Product B",
  "price": 120,
  "stock": 0
}

{
  "id": 1,
  "name": "Product B",
  "price": 120,
  "stock": 0
}

Comparison Result

Compare JSON Instantly

Visualize differences between two JSON objects. Validated, semantic comparison.

Semantic Diff

Compares actual JSON structure, not just text. Key order differences are ignored.

Live Comparison

See results instantly as you type or paste your JSON data.

Syntax Check

Validates both JSON inputs and alerts you to any syntax errors preventing comparison.

Easy Clean

Quickly clear inputs to start a fresh comparison.

How this JSON Compare works

This diff utility compares two JSON objects and highlights structural and value differences to help developers identify changes between versions. The tool parses both inputs, sorts keys for consistent comparison, and displays a side-by-side or unified view of additions, deletions, and modifications. Users can compare API responses, check configuration file drift, or verify data migration integrity. Features include syntax validation, automatic formatting for better readability, and color-coded highlighting to isolate changes quickly. Applications include debugging regression issues by comparing expected vs. actual JSON responses, auditing changes in CMS content, or merging JSON translation files.

How to Use

Paste JSONs

Paste the original JSON on the left and the modified JSON on the right.

Compare

The tool automatically highlights differences (additions, deletions).

Analyze

Review the color-coded output to understand what changed.

Frequently Asked Questions

How does the comparison work?

It parses both JSONs into objects and compares them semantically. Order of keys does not matter for equality.

What do the colors mean?

Green indicates added lines (present in the right JSON but not left), Red indicates removed lines (present in left but not right). Grey is unchanged.

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The JSON Compare is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.