Every YouTube thumbnail size, explained
What maxresdefault, hq720, sddefault, hqdefault, mqdefault and default actually mean, which videos have which, and why the smaller files have black bars.
Guides
Reference notes on thumbnail dimensions, file formats and upload requirements.
Download a YouTube or Vimeo thumbnail
Paste a link and get every stored size, up to 1280×720, straight from the source.
Resize and compress to 1280×720 under 2 MB
Hit YouTube's exact specification and fix the "file is too big" rejection, without uploading your image anywhere.
How this site handles your data
What the tools do and do not send anywhere, and what the advertising and analytics partners collect.