OpenAPI tools online
Explore Swagger and OpenAPI documents, validate specs, format JSON/YAML, generate OpenAPI from sample JSON, create examples, and diff versions — entirely client-side on space4.dev.
- OpenAPI Viewer for paths, schemas, and security
- Validator for OpenAPI 2.0 / 3.0 / 3.1
- Formatter, JSON → OpenAPI, example generator
- OpenAPI Diff with breaking-change highlights
OpenAPI
6 toolsView, validate, format, convert, and diff OpenAPI / Swagger specs — entirely in your browser.
OpenAPI
OpenAPI Viewer
Explore OpenAPI / Swagger specs — paths, operations, schemas, and security.
OpenAPI Validator
Validate OpenAPI 2.0, 3.0, and 3.1 documents with clear errors and warnings.
OpenAPI Formatter
Pretty-print or minify OpenAPI JSON and YAML with indent and key sorting.
JSON to OpenAPI
Infer schemas from sample JSON and generate an OpenAPI 3.1 document.
OpenAPI Example Generator
Generate realistic request and response examples from an OpenAPI spec.
OpenAPI Diff
Compare two OpenAPI specs for added, removed, and breaking changes.
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