OpenAPI to TypeScript
Generate TypeScript interfaces from OpenAPI schemas.
Use OpenAPI to TypeScript to keep your front-end and back-end speaking the same language. It's the fast, free way to turn one contract into another so your types never drift — generate, commit, and regenerate on every change.
About OpenAPI to TypeScript
Keeping two type definitions in sync by hand is where bugs creep in. OpenAPI to TypeScript generate TypeScript interfaces from OpenAPI schemas in a single paste, so your front-end and back-end always agree on the contract. Generate it once, commit it beside your code, and regenerate whenever the API changes. Like every ToolJolt utility it runs 100% in your browser — no sign-up, no upload, and nothing ever sent to a server, so it's safe for proprietary code and confidential data.
How to use OpenAPI to TypeScript
- 1Paste your schema or definition into the input.
- 2The converted schema, types or diagram is generated instantly.
- 3Copy or download it into your codebase or docs.
- 4Adjust the input and regenerate as your contract evolves.
Why use OpenAPI to TypeScript?
- ✓Turns one contract into another in seconds
- ✓Keeps front-end and back-end types in sync
- ✓Copy or download ready-to-use output
- ✓Eliminates hand-translating schemas by hand
Frequently asked questions
Which inputs does OpenAPI to TypeScript understand?+
OpenAPI to TypeScript parses the common, well-formed shapes developers paste day to day. Very exotic or deeply custom constructs may need a quick manual tidy, but the bulk of the work is done for you.
Why convert schemas instead of writing them twice?+
Keeping two representations in sync by hand is where drift and bugs creep in. Generating one from the other guarantees they match and saves real time on every change.
Is OpenAPI to TypeScript free?+
Yes. OpenAPI to TypeScript is completely free with no sign-up, no account, no usage limits and no watermarks. Use it as often as you like.
Does OpenAPI to TypeScript send my data to a server?+
No. OpenAPI to TypeScript runs entirely in your browser with JavaScript — your input never leaves your device, which makes it safe for private API payloads, schemas and source code.
Embed OpenAPI to TypeScript on your website
Want OpenAPI to TypeScripton your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/openapi-to-typescript" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="OpenAPI to TypeScript — ToolJolt" loading="lazy"></iframe>