📱 Thumbnail Preview Checker
See how your thumbnail looks on phones, desktop home, search results and the related-videos sidebar, at real size.
Note: check at 100% zoom, without enlarging or shrinking. Widths are approximate.
Phone home / search (about 343px wide)
Your video title goes here. Long titles are cut off after two lines
Your channel
12K views · 3 days ago
Desktop home (about 320px wide)
Your video title goes here. Long titles are cut off after two lines
Your channel
12K views · 3 days ago
Desktop search results (about 360px wide)
Your video title goes here. Long titles are cut off after two lines
Your channel
12K views · 3 days ago
Related videos (desktop sidebar) (about 168px wide)
Your video title goes here. Long titles are cut off after two lines
Your channel
12K views · 3 days ago
Why preview your thumbnail at real size?
Most viewers see your thumbnail as a small image in a feed. Text that looks fine in your editor can become unreadable at 168 px wide in the related-videos sidebar or on a phone.
Upload your image, type your title and channel name, and compare every placement side by side. If the text is hard to read at the smallest size, make it bigger, shorter or higher in contrast.
- Check at 100% browser zoom — do not enlarge the preview
- Test the smallest placement (related videos) first: if it reads there, it reads everywhere
- Try dark mode too, since many viewers use it
- Your image stays in your browser and is not uploaded