How to use the YouTube Thumbnail Resizer
- Upload your image. The size is set to 1280×720 automatically.
- Pick "Crop to fill" for a full-bleed thumbnail, or "Fit inside" to keep the whole image.
- Choose JPG for the smallest file and download.
- In YouTube Studio, open your video's details and upload it as a custom thumbnail.
YouTube thumbnail requirements
YouTube recommends 1280×720 pixels (minimum width 640 px) in a 16:9 aspect ratio, saved as JPG, PNG or GIF and under 2 MB. The same 16:9 thumbnail is used everywhere: search results, suggested videos, TVs and phones.
If your design was made at a different size, for example a square Canva graphic or a 4:3 screenshot, this tool crops or pads it to 16:9 so it doesn't get stretched.
Tips for clickable thumbnails
Use large, bold text of no more than 3–5 words, a close-up face with a clear expression, and strong contrast. Check that it still reads well at small sizes, because most people see thumbnails on a phone. Avoid putting important details in the bottom-right corner, where YouTube shows the video length.
Frequently asked questions
What size is a YouTube thumbnail?
1280×720 pixels at 16:9, under 2 MB.
My thumbnail is over 2 MB. What should I do?
Download as JPG at 85–90% quality. That's usually 150–400 KB for a 1280×720 image. You can also run it through the Image Compressor.
Can I make a thumbnail from a video frame?
Yes. Pause the video, take a screenshot, then upload the screenshot here.