What is ThumbPreviewer?
Free YouTube Thumbnail Previewer & A/B Testing Tool. Instantly preview your thumbnail and title on desktop, mobile, tablet, and Shorts. Compare multiple versions side-by-side with the built-in A/B Testing feature to optimize for higher click-through rates.
Problem
YouTube creators manually test thumbnails across devices by uploading screenshots or using multiple tools, requiring time-consuming manual previewing and no built-in A/B testing features to scientifically optimize CTR
Solution
A web-based tool that lets users preview thumbnail designs across desktop, mobile, tablet, and Shorts interfaces while enabling A/B Testing feature for side-by-side comparison of multiple designs (e.g., comparing 'Gaming Setup Reveal' vs '$10,000 Studio Tour' titles)
Customers
Content creators and YouTubers focused on optimizing video performance, typically aged 18-45, who regularly publish long-form videos and Shorts
Unique Features
Device-specific preview simulation (including YouTube's UI elements) + integrated split-test analytics without requiring third-party tools
User Comments
Simplifies cross-device thumbnail validation
A/B testing helps eliminate guesswork
Free alternative to paid thumbnail tools
Observed CTR improvements within weeks
Saves hours in thumbnail optimization
Traction
Launched April 2024, gained 2.6K Product Hunt upvotes and 89 comments within first week
Integrated with major design tools like Canva via API partnerships
Market Size
Global $319.8 billion online video market by 2029 (Statista) with 38+ million YouTube channels needing CTR optimization tools
