YouTube thumbnail preview
Check your thumbnail and title in illustrative desktop and mobile cards.
PNG, JPG or WebP · up to four variants
Images stay entirely in this browser. No account connection or analytics request.
Read it at the size people see
A full-size design can hide problems. Check the uploaded pixels at a large card, mobile card and small sidebar size. Keep the title visible to judge whether it adds context or repeats the image text.
These are simulated layouts
Card sizes, title wrapping and neighboring examples are illustrative. YouTube changes layouts across devices and experiments. This tool does not access your channel, measure CTR or run an audience test.
Compare two useful questions
Can you identify the main subject without zooming? Can you understand the key words on a small card? If either fails, simplify the maker design. Use YouTube Studio’s actual experiments for audience evidence; those compare watch-time outcomes.
Content/source review: 2026-10-04
- YouTube title and thumbnail experiments ↗ · checked 2026-10-04