A growing collection of tiny Chrome extensions that surface real data — like counts, top comments, subscriber numbers — the moment you hover a YouTube thumbnail. No more 'wasted 10 minutes on a bad video.'
Hover for 0.25s — the numbers pop up.
All built for YouTube. Each tool is its own Chrome extension — install only what you need. Buy credits per tool, no subscription, no expiry.
Hover any YouTube thumbnail to see the real like count. Decide if a video is worth your time before you click.
Hover any YouTube thumbnail to preview the top comment. Real viewer sentiment beats a like count.
Hover any YouTube thumbnail to see channel subscriber count. Tell big channels from small ones at a glance.
Built around the moment you're actually deciding whether to click.
Pick a tool from the list above and add it to Chrome.
One account works for every tool in the family.
Real data shows up beside the thumbnail. Click only when it's worth it.
Most 'smart browsing' extensions either bundle a hundred features you don't want, or scrape data in ways that put your account at risk. OnceTool takes the opposite bet: each tool does one thing, uses official APIs, and respects the platform's rules.
Built and maintained by the OnceHit family — the team behind OnceClip, OnceEvent, OnceKeeper, OncePing.