YouThumb - YouTube Thumbnail CTR Optimizer

Tracking since Apr 6, 2026.

Changelog

• Apr 23, 2026
  description

  Stop guessing if your thumbnail will get clicks. YouThumb lets you preview your thumbnail inside the real YouTube feed — surrounded by actual competitor videos — before you publish.
  
  Upload your design, type your title, and instantly see exactly what viewers see.
  
  PREVIEW IN THE REAL FEED
  • Home Feed, Search Results & Watch Sidebar
  • Place your thumbnail at any position in the feed
  • Switch between Dark & Light YouTube themes
  • Preview on Mobile & Desktop layouts
  
  STRESS-TEST FILTERS
  • Blur Test — Can viewers recognize it at a glance?
  • Grayscale Test — Does it stand out without color?
  • Mobile View — How does it look on phone screens?
  
  AI-POWERED FEED SCAN
  • AI ranks your thumbnail against 5 real competitors
  • Get a clear Feed Rank and actionable improvement tips
  • Know exactly what to fix before you publish
  
  HOW IT WORKS
  1. Open YouTube and click the YouThumb extension
  2. Upload your thumbnail and enter your video title
  3. Preview it in the real YouTube feed
  4. Run an AI Scan to see how you rank against competitors
  5. Fix what needs fixing. Publish with confidence.
  
  FREE TO USE
  • Preview and stress-test — free, no sign-up needed
  • AI scans use tokens — 100 free tokens on sign-up
  • Works directly inside YouTube
  • No YouTube account connection required
  
  Perfect for YouTube creators, video editors, and thumbnail designers who want more clicks and better CTR.
  
  Test your thumbnail before publishing. Get the clicks you deserve.

  Increase your YouTube CTR before you publish.
  
  Most thumbnails don’t fail because of design — they fail because they don’t stand out in the feed.
  
  YouThumb helps you predict performance before you go live.
  Preview your thumbnail in real YouTube feeds and get AI-powered feedback based on competing videos.
  
  WHY IT WORKS
  • See your thumbnail next to real competitors
  • Understand if it actually stands out
  • Fix weak spots before publishing
  • Make decisions based on data, not guesswork
  
  REAL FEED PREVIEW
  • Home, Search & Watch Sidebar
  • Mobile & Desktop layouts
  • Dark & Light mode
  • Control position in feed
  
  CTR STRESS TESTS
  • Blur Test — instant recognition
  • Grayscale — contrast & clarity
  • Mobile View — small-screen performance
  
  AI PERFORMANCE ANALYSIS
  • Compare against 5 competing videos
  • Get a Feed Rank score
  • Clear suggestions to improve CTR
  
  FREE TO USE
  • No sign-up for preview
  • 100 free AI tokens
  • Works directly inside YouTube

• Apr 23, 2026
  short_description

  Test your YouTube thumbnails before publishing. Preview in the real YouTube feed and get AI feedback to maximize clicks.

  Optimize Thumbnail CTR before publishing. Get the clicks you deserve.

• Apr 23, 2026
  name

  YouThumb - YouTube Thumbnail Test & Preview

  YouThumb - YouTube Thumbnail CTR Optimizer

Permissions & access

Permissions

activeTabstorageidentitytabs

Host access

https://www.youtube.com/*, https://www.googleapis.com/*, https://accounts.google.com/*, https://firestore.googleapis.com/*, https://*.firebaseio.com/*, https://*.firestore.googleapis.com/*, https://identitytoolkit.googleapis.com/*, https://securetoken.googleapis.com/*, https://*.firebaseapp.com/*, https://*.googleapis.com/*, https://us-central1-aiplatform.googleapis.com/*, https://us-east1-aiplatform.googleapis.com/*, https://us-west1-aiplatform.googleapis.com/*, https://europe-west1-aiplatform.googleapis.com/*, https://asia-east1-aiplatform.googleapis.com/*, https://api.youthumb.online/*

Screenshots

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