Hover any YouTube thumbnail — the real subscriber count of that video's channel appears in the top-left corner. Tell big channels from small ones at a glance.
Demo: hover on a video thumbnail for 0.25 seconds
Pulled from YouTube's official Data API v3. Not estimated, not scraped.
Subscriber counts cached for 7 days. The second person to hover a thumbnail from the same channel gets a response in under 30ms.
Works anywhere YouTube shows a thumbnail — hover the thumb and we look up its parent channel.
Tooltip only appears on hover, vanishes when you move away. YouTube's own UI is untouched.
One-click install from the Chrome Web Store. No setup required.
One account works across the family. Credits sync across devices.
Pause 0.25s on any thumbnail; the icon appears in the top-left, click to see the channel's subscriber count.
Pay as you go. Credits never expire. Each tool has its own balance.
Buy once, use whenever. No "use it or lose it" pressure.
Sign in and your credits work on desktop, laptop, and tablet.
All data comes from YouTube's official Data API v3 — not estimates, not scraping.
No auto-renew, no subscription. 14-day no-questions-asked refund via PayPal.
1,500 credits
$0.0033 per hover
For casual lookups when you only hover once in a while.
Go to checkout3,500 credits
$0.0029 per hover
Most popular — you get ~17% more credits per dollar.
Go to checkout8,000 credits
$0.0025 per hover
For power users and creators — lowest per-hover cost.
Go to checkoutPowered by PayPal · One-time purchase, no auto-renewal · 14-day money-back
Already bought before? Sign in with license key →
We don't scrape YouTube pages or call private APIs. All data comes from Google's official Data API v3.
We don't collect your watch list or sell your hover behavior. Each hover sends only the video ID; our backend resolves it to a channel ID and returns the subscriber count.
Your OnceAccount session lives in chrome.storage.local. It is never leaked to other sites.
After installing, your first hover prompts a login. Free starter credits included. Not happy? PayPal 14-day no-questions-asked refund.