Cloudinary

1. Developer Get Started

   Cloud name, credentials, and the media workflow.

2. Upload Images and Videos

   Upload API, unsigned vs signed uploads, and upload widget.

3. Upload Presets

   Predefined upload options and unsigned uploads.

4. Image Transformations

   URL-based transformations, resizing, and chaining.

5. Image Optimization and Responsive Images

   Automatic format and quality, and responsive images.

6. Video Manipulation and Delivery

   Video transformations and streaming delivery.

7. Delivery URLs and Asset Types

   Delivery type, public IDs, and URL structure.

8. Authentication Signatures

   Signing API requests and delivery URLs.

9. Admin API

   Managing assets, metadata, and usage.

10. Notifications and Webhooks

    Asynchronous notification callbacks.

11. Assets (Digital Asset Management)

    Media Library, structured metadata, and folders.

12. MediaFlows

    Workflow automation with EasyFlows and PowerFlows.

13. SDKs

    Language SDKs for upload and delivery.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.