Attention heatmap
Visual saliency estimates where the eye lands first. If the hotspot misses the face, hook, or main contrast, the design needs another pass.
Saliency · focal point
Tool · Thumbnail analysis
ThumbnailRank
Score YouTube thumbnails before YouTube does.
A Mark Studios tool that catches weak thumbnail concepts before they cost you clicks.
4s
Pre-publish analysis
0 uploads
Image stays local
5 free
Analyses per month
A/B
Compare concepts
What it checks
A pre-publish rubric, not vibes.
Every score points back to visible thumbnail quality factors so creators, editors, and teams can decide what to fix before the video goes live.
Text readability
OCR detects thumbnail text, then checks contrast and size against mobile feed conditions so small words do not disappear on phones.
OCR · contrast · sizeComposition scoring
Rule-of-thirds, balance, edge spacing, and focal clarity get scored with coordinates and percentages instead of subjective comments.
Thirds · balance · bleedA/B comparison
Drop two candidates side by side and get a per-axis delta so the team can pick a winner before debating it in Slack.
Head-to-head deltaYouTube feed simulator
Preview the thumbnail in feed, search, and sidebar contexts so you can see how it reads next to competing content.
Feed · search · sidebarColor-vision check
Simulate common color-vision profiles and catch designs that only work for people with full color perception.
3 accessibility views
Workflow
The check happens before the upload.
Built for the final review moment: title locked, thumbnail candidates ready, and the team needs a clear reason to revise or ship.
01
Upload locally
The image is decoded in the browser. No account is required for the free workflow and no thumbnail is sent to a server.
02
Read the score
Review the heatmap, OCR readability, composition, color impact, mobile preview, and niche benchmark.
03
Fix or compare
Export a report, compare a second concept, or send the feedback to your editor before publishing.
Decision support
It does not promise CTR. It catches visible problems.
ThumbnailRank is intentionally honest: it does not access private analytics or guarantee click-through rate. It scores the design qualities that usually decide whether a thumbnail earns the click in the first place.
- Catch unreadable text before mobile viewers see it.
- Find weak focal points before the thumbnail sits in a crowded feed.
- Compare candidates with a repeatable rubric your editor can learn from.
1%
CTR lift modeled
+50K
Mid-tier extra views
+$400
Monthly ad upside
0 guess
Rubric over opinions
The math
A 1% CTR lift is not a small thing.
The same video, same impressions, and same audience can produce very different results when the thumbnail earns more clicks. ThumbnailRank does not promise that lift; it helps catch the visible problems that keep you from earning it.
Plans
Start free, upgrade when thumbnails become a system.
Free works for occasional uploads. Creator is for weekly publishing. Studio is built for editors, agencies, and teams managing multiple channels.
Score the next upload
$0 forever
No card required.
- 5 analyses per month
- Full attention heatmap
- Composition and readability score
- Mobile feed preview
- Local history on this device
For weekly channels
$19 / month
Unlimited checks for serious creators.
- Unlimited analyses
- A/B comparison
- Niche benchmarking
- Color-vision check
- PDF export with brand watermark
- Title-thumbnail synergy scoring
For teams and agencies
$49 / month
Workflow features for multiple channels.
- Everything in Creator
- 5 team seats
- White-label PDF reports
- Shareable client review links
- Bulk upload and queue
- Dedicated Slack channel
Privacy-first
Your unreleased thumbnail never leaves this tab.
Most thumbnail tools upload your image to a black-box server. ThumbnailRank does the analysis in the browser. Close the tab and the image is gone.
- No server upload for image analysis.
- No account required for the free workflow.
- No Facebook pixel, marketing replay tools, or session recording.
Niche-aware
A gaming thumbnail and a finance thumbnail should not be scored the same way.
The rubric adapts to the category. Gaming can be loud, finance usually needs instant trust, and podcasts need legibility in small feed placements.
GamingFinanceFitnessTechFoodTutorialVlogEducationDIY
FAQs
Frequently Asked Questions
How does the attention heatmap work?
A visual saliency model estimates where viewers are likely to look first by evaluating contrast, edge density, faces, and text placement.
Do you use real YouTube CTR data?
No. ThumbnailRank scores visual factors that correlate with strong thumbnails. It does not access private YouTube analytics and does not promise CTR.
What thumbnail size should I upload?
Use YouTube's recommended 1280 by 720 pixel 16:9 thumbnail when possible. ThumbnailRank accepts anything from 640 pixels wide and flags spec issues.
Does my image get uploaded to a server?
No. The analyzer runs in your browser using the Canvas API. Your thumbnail never touches ThumbnailRank servers.
Can I analyze competitors' thumbnails?
Yes. Save a public YouTube thumbnail image and upload it to ThumbnailRank. Competitor benchmarking is available on the free workflow.
Does it work for TikTok and Instagram?
The rubric is calibrated for YouTube's 16:9 thumbnail environment. Some checks still help elsewhere, but niche-specific scoring is built for YouTube.
Run the thumbnail check before the upload.
Open ThumbnailRank, upload the candidate image, and give your editor a cleaner reason to revise or ship.
Open ThumbnailRank