AI thumbnail maker for YouTube that writes the brief, generates the image and checks it at feed size
Free AI-powered photo extender for any aspect ratio with no sign-up required and no watermark
Stage
Not given
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Founded
Not given
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Based in
MA
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Pricing model
Paid
Freemium
Pricing
Not given
Free to try without sign-up; Basic $9.90 (100 credits), Standard $29.90 (500 credits), Pro $49.90 (1,250 credits). Each successful image uses 5 credits. One-time purchases with no subscription; credits never expire.
Key features
Paste YouTube video link to automatically write brief from title, description and transcript
Text is read back and corrected if letters are wrong
Checked at feed size with readability graded at 336 pixels
Brand kit to apply channel colors, lettering and visual style to every thumbnail
Export at 4K resolution (3840×2160) recommended by YouTube
Auto-Polish finds weakest point and fixes it automatically
Real AI outpainting powered by gpt-image-2 model
Support for any aspect ratio including 1:1, 4:5, 16:9, 9:16, 21:9 and custom ratios
Free to try without signing up
No watermark on results
Free daily credits with a free account
Supports JPG, PNG and WebP files up to 4MB
Full resolution export
Results typically ready in 60–120 seconds
Works on any mobile or desktop browser without app installation
Secure HTTPS processing with no account required
What makes it different
Text automatically checked and corrected before you see the image
Built specifically for YouTube's constraints like duration badge corner and feed size
Full commercial rights with no watermark on any plan
Real generative AI instead of simple blur-and-stretch algorithms
Optional one-time credit purchases with no subscription
No watermark on downloaded results
Free daily credits automatically top up when balance runs low
ThumbnailMaker
Photo Extender