⚙️ Options
📥 Schema A (Old)
📥 Schema B (New)
🔒All Schema comparison is done locally in your browser
Pure Frontend · Recursive Comparison · Path Tracking · Highlight Changes
Zero Dependencies · Works OfflineJSON Schema Diff Viewer is a pure frontend online tool for comparing structural differences between two JSON Schema definitions. Input old and new Schemas, and the tool automatically recursively compares property definitions, types, constraints, etc., highlighting added, removed, and modified fields with full property path tracking. Supports ignoring non-functional differences like description/title. All processing is done locally in your browser.
properties.user.properties.ageStep 1: Paste the old JSON Schema in Schema A input.
Step 2: Paste the new JSON Schema in Schema B input.
Step 3: Click "Compare Diff" or Ctrl+Enter to see the diff report.
Step 4: Click "Copy Report" or "Download" to export the diff result.
Compare API v1 and v2 Schema definitions to quickly identify field changes and assess client compatibility impact.
Track database model Schema version changes, recording field additions, deletions, and modifications for each iteration.
Compare Schema changes in Code Review to ensure modifications meet expectations and avoid missing breaking changes.
Integrate Schema diff reports into CI pipelines to automatically detect API compatibility changes.
JSON Schema is a specification for describing JSON data structure (JSON Schema Draft 2020-12, etc.). When comparing two Schemas, the core is comparing properties, required, type, items, and other key fields. The recursive comparison algorithm traverses each property in properties, continuing deeper for nested object types. Diff detection includes: property existence, type changes, constraint changes (min/max/enum/pattern, etc.), required array changes. In API design, Schema diff comparison is an important method for ensuring backward compatibility.
JSON Schema diff compares two JSON Schema definitions to find structural differences, including added fields, removed fields, type changes, constraint changes, etc.
Supports added properties, removed properties, type changes, required changes, format changes, enum value changes, min/max constraint changes, nested object recursive diffs.
Yes. The tool supports recursive comparison of nested object and array definitions, automatically tracking property paths.
Yes. You can copy the diff report as JSON format or download it as a file.
No. All Schema comparison is done locally in your browser. Your data is never uploaded.
Best for API version migration, data model evolution tracking, Schema compatibility checking, and team collaboration Schema change review.