What OpenAPI versions does this tool support?

OpenAPI to cURL supports OpenAPI 3.0, OpenAPI 3.1, and Swagger 2.0 specifications. Both JSON and YAML formats are accepted.

Does this tool send my API spec to a server?

No. All processing happens entirely in your browser. Your spec is never uploaded or sent anywhere. This makes it safe to use with private or proprietary API specifications.

How does authentication work in the generated curl commands?

The tool reads the security schemes defined in your spec. It supports Bearer token (Authorization: Bearer ), HTTP Basic auth (-u user:pass), and API key authentication. Placeholder values are used that you can replace with your actual credentials.

Can I download all curl commands at once?

Yes. Click 'Download All as .sh' to download a shell script containing curl commands for every endpoint in your spec. The script is ready to run after you fill in your actual token or credentials.

What if my spec uses $ref references?

The tool resolves simple inline $ref references for request bodies and parameters. Complex external $ref references (pointing to other files) are not resolved since the tool is fully offline.

Can I use this with Swagger UI or Redoc specs?

Yes. Any spec that powers Swagger UI or Redoc can be pasted directly into this tool. Just copy the raw JSON or YAML source of the spec.

Free API Tool

Generate curl Commands
from Any OpenAPI Spec

Paste your OpenAPI 3.x or Swagger 2.0 spec (JSON or YAML) and instantly get copy-ready curl commands for every endpoint. No login, no server — 100% browser-based.

⚡

Instant Conversion

Paste your spec and get curl commands for all endpoints in under a second.

🔐

Auth Scheme Support

Automatically handles Bearer token, Basic auth, and API key authentication.

📋

Copy or Download

One-click copy per endpoint or download all commands as a .sh shell script.

OpenAPI Spec Input

JSON or YAML · OpenAPI 3.x · Swagger 2.0

Frequently Asked Questions

Everything you need to know about OpenAPI to cURL.