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JSON Diff Online

Compare two JSON documents and find added, removed, or changed values with a clear browser-based JSON diff.

100% FreeNo Signup RequiredPrivacy Friendly
Privacy note: JSON comparison on this page is performed in your browser. Do not enter passwords, private keys, payment data or other confidential information into any online tool.
Original JSON
Updated JSON
Added0
Removed0
Changed0
Same0
Comparison Results
  • Click Compare JSON to see the differences.

JSON Diff Online for Developers

ToolsPoint Online's JSON Diff is a free JSON compare tool for checking two JSON objects or arrays. It parses both documents and reports values that were added, removed, or changed. This is useful when reviewing API responses, configuration files, application settings, test data, or JSON generated by different versions of a web application.

Unlike a plain text comparison, this JSON difference checker compares parsed JSON structure, so changes can be reported by property path instead of being hidden by indentation or line-break differences. The comparison runs in the browser, making it convenient for developers working with JSON in the US, UK, India, or elsewhere.

How to Compare JSON Online

  1. Paste the first JSON document into Original JSON.
  2. Paste the second document into Updated JSON.
  3. Click Compare JSON.
  4. Review added, removed, changed, and unchanged values by JSON path.
  5. Copy the comparison report or download it as a text file when needed.

What This JSON Diff Tool Checks

  • Added values: properties or array values present in the updated JSON but not the original.
  • Removed values: properties or values present in the original but missing from the updated JSON.
  • Changed values: the same JSON path exists in both documents but its value differs.
  • Unchanged values: matching paths and values are counted for a quick comparison summary.
  • JSON syntax: both inputs must be valid JSON before structural comparison can run.

Common Uses for a JSON Compare Tool

A JSON diff is useful for comparing API responses, tracking configuration changes, checking data migrations, reviewing application settings, testing web services, and identifying changes between two versions of structured data. Because the comparison is based on parsed JSON, formatting whitespace does not by itself create a difference.

Privacy and Browser Processing

The comparison logic on this page runs in your browser. Avoid entering credentials, private keys, payment information, or other highly confidential data into any online tool.

Frequently Asked Questions

Is this JSON Diff tool free?
Yes. The JSON comparison tool is available free of charge and does not require an account.
Can I compare two JSON objects online?
Yes. Paste two valid JSON objects or arrays and select Compare JSON to see structural differences.
Does formatting affect the JSON comparison?
No. The tool parses the JSON before comparing it, so indentation and line breaks are not treated as value changes.
What happens if one JSON document is invalid?
The comparison stops and shows a syntax error so you can correct the invalid JSON before comparing the documents.