A thumbnail isn`t "pretty" — it`s "communicate in 3 seconds + bait the click." Spec one exaggerated expression OR one contrasting object + 1–2 color blocks + a large negative-space area for the title. YouTube wants exaggerated reaction faces; TikTok wants action-in-progress; Xiaohongshu wants minimal + tasteful.

In-depth articles in this hub

Each card below is a full breakdown — click in to read the complete article:

Best for

  • YouTube video thumbnails
  • TikTok / Reels still cover
  • Xiaohongshu note covers, Bilibili thumbnails

Quick reference: example prompts

Quick sample prompts you can copy and adapt (full walkthroughs are in the articles above):

YouTube tech comparison thumbnail

YouTube thumbnail style, split-screen composition: one half showing an iPhone with red glow, other half a Samsung phone with blue glow, exaggerated shocked male face overlay on left third, deep contrast, large empty top-right area for title text, ultra bold modern look, --ar 16:9

Xiaohongshu minimal cover

Xiaohongshu cover, flat-lay of an iPad, latte, croissant on cream linen, soft natural window light, warm minimal aesthetic, large negative space at the top for a Chinese title, slightly desaturated, --ar 3:4

TikTok mid-action

Vertical TikTok thumbnail, woman mid-jump in bright yellow sweater against magenta background, freeze-frame motion blur on hair, bold high-contrast palette, large room at bottom for caption text, --ar 9:16

YouTube tutorial cover

YouTube tutorial thumbnail, hand holding a phone screen showing a glowing AI chat UI, surprised emoji bubble floating beside, dark blue background with neon highlight, large empty right side for bold yellow title, --ar 16:9