Thumbnail Labs
Preview, score, and stress-test your YouTube thumbnail
What it does
ThumbnailLabs lets YouTube creators preview their thumbnail in real feed, search, and mobile layouts before uploading. Compare it against live competitor thumbnails for any keyword, get an instant CTR score based on contrast, saturation, and face detection, and run stress tests like a squint-zoom and colorblindness filters. 100% free, no login, nothing leaves your browser.
Does the same job
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ThumbRank12d ago · thumbrank-youtube-th-n5m8.bolt.host · ▲1Preview your YouTube thumbnail before publishing
More growth this month
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AstraPixels▲267A pixel-art solar system at its real current positions.
Growth · 29d ago · astrapixels.com
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com