Swagger 2.0 → OpenAPI 3, in one click
Plenty of production APIs still describe themselves in Swagger 2.0. Paste one into OASForge and a banner offers the conversion; one click later you have an OpenAPI 3 document, converted entirely client-side — the spec never leaves your browser.
What the converter rewrites
| Swagger 2.0 | OpenAPI 3 |
|---|---|
host + basePath + schemes | servers array |
in: body parameter | requestBody with media-type content |
in: formData parameters | requestBody as form-urlencoded / multipart schema |
produces / consumes | Per-response and per-request content maps |
definitions | components.schemas |
securityDefinitions | components.securitySchemes |
#/definitions/* refs | Rewritten to #/components/schemas/* |
Then fix what the converter can't guess
Conversion is mechanical; intent isn't. After converting, the version-aware validator points out what needs a human: leftover 2.0-isms are flagged with their modern replacements, and most issues carry a one-click fix. When you're done, preview the result in Swagger UI, exercise it against the in-browser mock server, or export it. Start in the editor.
No signup, no install — the editor runs entirely in your browser.
Start in the editor