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Practical notes on sizes, readability, text and using AI responsibly — written by the Thumbora team.
The numbers are simple — 1280×720, 16:9, under 2 MB. Getting a sharp, correctly colored file into YouTube Studio takes a few more decisions. Here they are, in order.
Most decisions about a thumbnail are made in a split second on a small screen. Six practical rules for thumbnails that stay clear at a few centimeters wide.
Thumbnail text works like a headline on a poster: short, big and saying something the title doesn’t. How to choose the words, the font, the placement — and how to handle AI-rendered text.
AI makes it easy to create any image. That’s exactly why a few rules matter: honesty toward viewers, consent for faces, respect for other people’s work and a human check before publishing.
Describe your next video and compare several thumbnail options in a few minutes.