Paste both versions
Use valid JSON from two environments, releases, files, or API calls.
JSON tools
JSON Diff Checker
Compare two JSON files or API responses
The result will appear here after you run the tool.
JSON Patch
The result will appear here after you run the tool.
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About this tool
About this tool
JSON Diff Checker produces a path based report of additions, removals, and changed values by recursively comparing two JSON documents in the browser. Filters separate type changes from value edits and paths use JSONPath style notation for precise location.
Paste two valid JSON values to generate a path based difference report. Filter changes by type and inspect the old and new values without uploading the data.
Built for daily work
- Compare API responses before and after a release.
- Review configuration changes between environments.
- Check generated output against an expected fixture.
- Identify breaking type changes in sample payloads.
How to use this tool
How to use this tool
Run the comparison
The tool recursively compares objects and arrays and records the exact path for each difference.
Filter important changes
Review additions, removals, type changes, and value changes separately.
Key features
Key features
JSONPath locations on every change
Each added, removed, or modified value includes a dot-notation path such as $.users[2].roles so you can locate it in source files.
Segmented diff filters
Toggle visibility of added, removed, and changed rows to focus on what matters for API compatibility or configuration review.
Type change detection
When the same path holds a string in one version and a number or boolean in the other, the diff flags it as a type change rather than a value edit.
JSON Patch output
A separate panel generates an RFC 6902 JSON Patch document that describes the diff in an interoperable format.
Side-by-side input with separate examples
Left and right panels each have their own file upload and example loader so you can compare different fixtures without copy-paste.
Practical use cases
Practical use cases
- Compare API responses before and after a release.
- Review configuration changes between environments.
- Check generated output against an expected fixture.
- Identify breaking type changes in sample payloads.
Private by default
For local tools, input is processed in your browser and is not sent to application analytics.
Data processing noticeTechnical details
Technical details
ComparisonRecursive structural comparison
PathsJSONPath style output
ArraysCompared by index
ProcessingLocal browser processing
Limitations and important notes
Limitations and important notes
- Array order is treated as significant.
- The tool compares values, not semantic meaning.
- Very large reports may be limited by browser rendering performance.
- Whitespace and formatting differences are ignored after JSON parsing.
Frequently asked questions
Frequently asked questions
Yes. Arrays are compared by index because order can be meaningful. Sort or normalize arrays first when order should be ignored.
No. Repair or format both inputs first so each side can be parsed into a reliable structure.
A type change occurs when the same path changes between object, array, string, number, boolean, or null.
No. Both sides are parsed and compared in your browser.
Yes for sample-based review, but validate important contracts with schema tests and representative examples.
Related guides and solutions
Related guides and solutions
How to compare two JSON API responses
Normalize both responses, decide how arrays should be compared, classify differences by path, and review structural changes before changing values such as identifiers or timestamps.
Learn moreHow to inspect a JSON API response before integration
A structured API response review process for developers, QA teams, technical writers, and integration engineers.
Learn moreJSON syntax and data type reference
A compact technical reference for writing and validating strict JSON that can be opened in standards-compliant parsers.
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