YouTube Thumbnail Resizer
Resize
16:9, mandatory for thumbnails.
Saves your edited image at its current dimensions, keeping the original file format. The canvas shows exactly what downloads.
Your images are processed locally in your browser and never uploaded to any server.
YouTube requires thumbnails at 1280×720 (16:9) and silently letterboxes anything else, killing click-through. Resize to the exact spec locally, and remember the bottom-right corner gets covered by the duration badge.
How to use the youtube thumbnail resizer
- Upload your thumbnail image.
- The 1280×720 preset applies automatically.
- Check that key content avoids the bottom-right corner (timestamp badge zone).
- Download. The file is ready for upload.
Frequently asked questions
What is the YouTube thumbnail size?
1280×720 pixels, 16:9 aspect ratio, under 2 MB. That last part is rarely a problem, and if it is, the image compressor handles it.
Why 16:9 specifically?
It matches YouTube's player and grid layouts. Other ratios get bars around them in search results and recommendations, shrinking your thumbnail exactly where size equals clicks.
What file format should a thumbnail be?
JPG, PNG, or GIF all work; JPG at quality 85+ is standard. Keep text large and high-contrast. Thumbnails render tiny on phones, and this is the one image where readability decides everything.