AI Thumbnail Generator

An AI thumbnail generator is a tool that makes video thumbnails from a description, with the right 16:9 shape, a clear subject and bold text. On Kenerate, the Thumbnail preset in /app/image generates four variants per click on models such as GPT Image 2 and Seedream 5.0 Pro, so you can pick the one that still reads at phone size.

The best AI YouTube thumbnail generator gets the words right at a small size. GPT Image 2 was the most reliable with thumbnail text in our tests, at 16:9 up to 4K. Seedream 5.0 Pro gives polished photo looks at 2K, and Qwen Image 3.0 on the free plan also handles text. Make four variants and compare them at phone size.

Yes, to start. A free Kenerate account can use the free image models, and Qwen Image 3.0 is on the free plan and handles text, so you can make thumbnails before paying anything. Batches of GPT Image 2 variants and the Marketing Studio need a paid plan or a one-time credit pack, with no subscription required. Downloads have no watermark.

Yes. Put the exact words in quotes and keep them to three to five words, huge and high-contrast. GPT Image 2 was the most reliable with text in our tests, and Qwen Image 3.0 on the free plan also handles text. Check the result before you publish: in our comparison GPT Image 2 added an extra line of text on its own.

Yes. Upload your photo as a reference to GPT Image 2, which accepts up to 16 references, or Seedream 5.0 Pro, which accepts up to 10, and describe the scene, emotion and text. Keep one face big in the frame so it reads at small sizes. Only use your own photo or one you have permission to use, never another creator's face.

Yes. For a video that sells a product, use the Marketing Studio's Static banner style at 16:9: it keeps your real product exact from your photo and adds the headline you write. It works as an AI video thumbnail generator for product reviews, unboxings and ads. The Marketing Studio needs a paid plan or a one-time credit pack.