Thumbnail Tools
AI thumbnail makers and tools for YouTube videos, Shorts and other video formats.
Free utilities
No account needed. They run in your browser on your own files.
YouTube Thumbnail Size Guide
The current YouTube thumbnail size, aspect ratio, file formats and file-size limits for videos and Shorts, with blank canvases to download.
YouTube Thumbnail Preview
Upload your thumbnail and see how it looks in a home feed, search results and the suggested sidebar, on desktop and mobile, in light and dark.
Thumbnail Safe Zone Checker
Upload your thumbnail and see which parts are covered by the duration badge, progress bar and hover buttons.