Thumbfa.st

Thumbfa.st is an AI YouTube thumbnail generator for creators who want to produce thumbnails for videos and test different versions. It focuses on keeping a person’s face consistent across outputs and on copying useful visual patterns from existing thumbnails. The site describes itself as "The Midjourney of YouTube Thumbnails" and says its AI thumbnails are intended to outperform human-made designs.

Several features are called out directly. It can generate up to four thumbnail variations at once, and each generation is tied to a saved face profile so the same likeness can be reused. Template Mode lets a user start from a thumbnail they like and generate variations from it, with more than 100 templates ready to use. It also supports an inspiration workflow based on pasted YouTube URLs, where the AI extracts style, colors, text placement, and mood for later reference in an Inspiration library. A built-in editor accepts sketches made with rough shapes, arrows, notes, stick figures, and annotations, which the AI turns into a finished thumbnail. The service also says every generated thumbnail is saved automatically, can be reviewed in version history, and is produced at YouTube’s 1280x720 resolution as a PNG.

The page also describes a podcast mode that swaps guests while keeping style, lighting, and brand consistent across episodes. It names the intended audience as YouTube creators and refers to users who want professional thumbnails without a professional learning curve. The product is delivered on the web, with a live editor at thumbfa.st/editor.

Pricing is partially stated. A free option includes five thumbnails, no credit card is required, and the page says more than 1,000 thumbnails have been generated, more than 100 creators have joined, and more than 500 inspirations have been saved. No licensing terms are stated.