AnonymizeThumbnails
Replace people in any thumbnail with wireframe mannequins. Paste a YouTube URL or upload an image. Uses 1 thumbnail per anonymization.
Before
After
AI replaces every person with a featureless grey mannequin while keeping everything else identical.
Supports youtube.com, youtu.be, embeds, Shorts, and live URLs.
1 thumbnail per anonymization · 5 free thumbnails on signup.
The Solution
Meet Your AI Thumbnail Designer
Thumbfa.st isn't just another AI image generator. It's built specifically for YouTube creators who want professional thumbnails without the professional learning curve.
Your Face, Every Time
Upload your photo once, use it forever. Our AI maintains your exact likeness across every thumbnail — building the brand recognition that drives repeat clicks.
Copy What Works
See a high-performing thumbnail? Paste the YouTube URL. We extract the style, colors, and composition from proven winners so you can replicate their success.
A/B Test Like the Pros
Generate 1-4 thumbnail variations with one click. Data-driven creators A/B test their options — now you can too.
More Videos, More Views
Stop losing momentum to thumbnail design. Spend that time creating content that grows your channel.
Everything You Need. Nothing You Don't.
Powerful features designed specifically for YouTube creators who want professional thumbnails fast.
Upload Once, Generate Forever
Create a 'Person' profile with your photos and description. Every future thumbnail automatically includes your consistent likeness. No more re-uploading, no more AI guessing games.
Copy Any Thumbnail's Vibe in 10 Seconds
Paste any YouTube URL. We grab the thumbnail and our AI analyzes the style, colors, text placement, and mood. Save it to your Inspiration library and reference it whenever you create.
4 Options. 1 Click. 0 Guesswork.
Generate up to 4 thumbnail variations simultaneously. See them side by side, pick your favorite, or test them all. Each variation uses just 1 thumbnail from your plan.
Never Lose a Good Idea
Every thumbnail you generate is saved automatically. Scroll through your version history, compare iterations, and revisit old ideas anytime.
Ready to Upload, Zero Adjustments
Every thumbnail is generated at YouTube's exact 1280x720 resolution. Download as high-quality PNG and upload directly to YouTube Studio.
3 Steps to Your Next Viral Thumbnail
No design skills needed. No complicated software. Just describe what you want and let AI do the heavy lifting.
Step 01
Set Up Your Creative Assets
Upload your face photos to create a Person profile. Paste YouTube URLs to save thumbnail styles you love. Do this once - use them forever.
Step 02
Describe Your Vision
Write a simple prompt describing your thumbnail. Select your Person, choose an Inspiration for style guidance, and pick how many variations you want (1-4).
Step 03
Generate and Download
Click generate and watch the AI work its magic. Preview your thumbnails, download the winner, and upload to YouTube. Total time: under 60 seconds.
Creators Are Getting Results
Join thousands of YouTube creators who've transformed their thumbnail workflow.
"The tool is really enjoyable to use!"
Get Thumbnails That Actually Convert
Stop guessing what works. Our AI thumbnails consistently outperform human-made designs. Join 2,000+ creators who've seen the results.