Upload guidance
A practical guide to thumbnail softness, source resolution, compression, and small-screen readability before upload.
A thumbnail can look sharp while you design it, then soft after YouTube scales it into search, suggested videos, and mobile cards. Start with the largest clean source you have, then confirm the thumbnail dimensions before upload.
Fine texture, tiny text, and low-contrast edges are the first things to lose clarity after platform compression. Larger text, stronger contrast, and a simple focal point usually survive better.
If the face, product, or title only works at full size, it may feel blurry in YouTube feeds. Use the checker and compare it with the safe zone guide when important content sits near an edge.