OpenAPI to TypeScript Converter
Generate TypeScript types from OpenAPI/Swagger
OpenAPI to TypeScript Converter is a free online tool from BrowserUtils that generate typescript types from openapi/swagger. It runs entirely in your browser — your data never leaves your device. No account required.
How to use OpenAPI to TypeScript Converter
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About OpenAPI to TypeScript Converter
Free online OpenAPI to TypeScript converter. Generate TypeScript interfaces and types from OpenAPI 3.x or Swagger 2.x schema definitions. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
OpenAPI to TypeScript Converter specs
- Runtime
- 100% client-side (browser)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How do I generate TypeScript types from an OpenAPI spec?
Paste your OpenAPI 3.x or Swagger 2.x specification (JSON or YAML) into the input field. The tool extracts schema definitions from components.schemas or definitions and generates TypeScript interfaces.
Does it support both JSON and YAML formats?
Yes, the tool accepts both JSON and YAML-formatted OpenAPI specifications. It auto-detects the format and parses the schema definitions to generate TypeScript interfaces with proper type mappings.
Is the OpenAPI to TypeScript converter safe for internal API specs?
Yes, all parsing runs in your browser. No spec data is uploaded to any server, so proprietary API definitions stay private.
How does the converter handle $ref references?
Schema references within components.schemas or definitions are resolved and each referenced schema is generated as a separate TypeScript interface with proper type cross-references.
Does the OpenAPI to TypeScript converter work offline?
Once the page is loaded, the converter runs entirely in the browser with no network requests. You can paste and convert specs without an internet connection.
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