Free no-login creator tool
YouTube Thumbnail Safe-Area Previewer
Upload your thumbnail and see how it looks at real sizes, with the duration-badge zone and safe margins marked. Everything stays in your browser — nothing is uploaded.
What to check: keep important text and faces inside the green safe area, away from the bottom-right where the video duration sits. If your thumbnail is unreadable at the mobile size, simplify it to one focal point and fewer words.
Tubely for Mac · $14 lifetime
Doing this in the browser is fine. Doing it in the app is faster.
You just did the planning in your browser. The app keeps every channel you manage one shortcut away — and uploads in the background while you keep working.
- All your channels in one appSwitch instantly between channels with isolated cookies and color tabs.
- Menu-bar uploads + native notificationsWatch upload progress in your menu bar without parking on the YouTube tab.
- Cmd+1-9 channel shortcutsJump channels with a keystroke; no popups, no re-logins, no tab chaos.
See all featuresOne-time payment · macOS 14+ · 3 device activations
Native macOS app