Guides & resources

Guides for YouTube creators

Practical, no-fluff articles on thumbnails, video optimization, and getting the most out of your content. Everything here is free to read.

YouTube Thumbnail Sizes Explained

The official dimensions, aspect ratio, file limits, and every resolution YouTube generates — with a quick-reference table.

The design principles behind thumbnails that get clicked — faces, contrast, text, and the mistakes to avoid.

Yes, Shorts have thumbnails too. Here's how to find and download them in every available size.

A step-by-step look at the "View Page Source" method for finding a video's hidden tags and keywords.