Free toolOpenAPI 3.0 / 3.1

OpenAPI Spec Diff & Compare

Compare two OpenAPI 3.x & Swagger 2.0 specifications side by side. Detect breaking changes, added/removed endpoints, and parameter diffs.

Spec A (base)

1

Spec B (changed)

1

Compare Two OpenAPI Specs

Paste, upload, or fetch two OpenAPI specifications above, then click Compare Specs to see a visual diff with breaking change detection.

Formats
JSON / YAML
Versions
2.0 / 3.x
Cost
Free

Free

Instant diff comparison, no account needed. Paste or upload your specs and compare them right away.

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Shareable diff links and diff history. Keep track of your API changes over time.

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