ThumbnailMaker is an AI thumbnail maker for YouTube. Paste a video link and it reads the title, the current thumbnail and the description (or a transcript you paste), then writes three angles to test: the scene, the words on the image and the style. Pick one and it generates the thumbnail at YouTube's real size, 1280 × 720 or 1080 × 1920 for Shorts, with the text drawn into the image.
Every image is checked before you see it: the text is read back and corrected if a letter went wrong, readability is graded at 336 px, the width of YouTube's desktop feed, and the bottom-right corner is kept clear of the duration badge.
When a result is close, you correct it by instruction ("make the text bigger") instead of regenerating. One click makes three concepts for YouTube's own A/B test.
The brief is free with an account, and eight free tools need no account (thumbnail tester, rater, resizer, viewer, text editor, title, description and tag generators). Plans start at $12 a month for 400 credits (40 thumbnails).
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