API Information
Endpoints
How to Generate API Documentation
- 1
Enter API Information
Start by providing your API title, version number, base URL, and a brief description. These fields populate the header section of your generated documentation and the info block in OpenAPI output. - 2
Define Your Endpoints
Click Add Endpoint and fill in the HTTP method, path, summary, and detailed description for each route. Use curly braces for path parameters, e.g./users/{id}. - 3
Add Request and Response Examples
Paste sample JSON into the request body and response example fields. Including realistic payloads helps consumers of your API understand expected data shapes without reading source code. - 4
Generate and Export
Choose Markdown or OpenAPI 3.0 JSON as the output format, then click Generate Documentation. Copy the result to your clipboard or download it as a file ready for your repository or documentation site.
Common Use Cases
Kickstart New Projects
GitHub README Documentation
OpenAPI Spec for Swagger UI
Client SDK Generation
Why Use an API Documentation Generator?
The FindUtils API Documentation Generator lets you build professional REST API documentation in minutes without writing Markdown tables or OpenAPI YAML by hand. Define your endpoints, paste example payloads, choose an output format, and download a ready-to-publish document. Everything runs in your browser -- no data is sent to any server, so proprietary API designs stay confidential.
Well-structured API docs are the single biggest factor in developer adoption. Studies consistently show that developers evaluate an API's documentation before its features. This tool produces clean, consistent output you can drop straight into a GitHub repository README or feed into OpenAPI Validator for compliance checks. If you already have a Swagger 2.0 file, convert it first with the Swagger to OpenAPI Converter, then use this generator to extend and polish the result.
For teams working with related formats, FindUtils offers a full suite of developer utilities. Format raw JSON payloads with the JSON Formatter, validate schemas using the JSON Schema Validator, or convert cURL commands into code snippets with cURL to Code. Together these tools cover the entire API development workflow -- from design and documentation to testing and integration.
How It Compares
Hand-writing OpenAPI specs in YAML or JSON is error-prone and time-consuming, especially for teams without dedicated technical writers. Paid platforms like Stoplight ($39/mo) and ReadMe ($99/mo) offer visual editors but lock documentation behind subscriptions. Free alternatives such as Swagger Editor require you to learn the OpenAPI schema syntax before you can produce anything useful.
FindUtils API Documentation Generator takes a form-based approach: fill in fields, click Generate, and get valid output instantly. There is no syntax to memorize, no account to create, and no usage cap. For simple-to-medium complexity APIs, this workflow is significantly faster than editing raw YAML while still producing spec-compliant OpenAPI 3.0 JSON that works with every major documentation renderer.