PDFConvertersOnline.comHow to make a YouTube thumbnail the right size
- Choose your picture, such as a still from the video or a designed graphic.
- 1280×720 is preselected. Drag the preview to frame it, or choose Fit with background to keep the whole picture.
- Press Resize and upload the JPG in YouTube Studio as your custom thumbnail.
What YouTube asks for
YouTube's help pages describe the custom thumbnail requirements as follows:
- Resolution of 1280×720 pixels, with a minimum width of 640 pixels.
- An aspect ratio of 16:9, the same shape as the video player.
- File type JPG, GIF or PNG.
- File size under 2 MB.
You also need a verified YouTube account before the custom thumbnail option appears in YouTube Studio.
The 2 MB limit is handled for you
A detailed PNG at 1280×720 can easily go over 2 MB, and the upload is then refused. On this page the output is JPG by default, which is almost always far below the limit. If a file still comes out bigger than 2 MB, for example because you chose PNG or a very detailed image at maximum quality, the tool automatically switches to JPG and lowers the quality step by step until it fits, and tells you the quality it used.
Getting the framing right
Screenshots, phone photos and square artwork rarely have a 16:9 shape. With Crop to fill, drag the preview to keep faces and titles in frame. With Fit with background, a vertical phone picture sits in the middle with colored bars at the sides, which is better than stretching it.
Remember what covers a thumbnail on the site: the video length is shown in the bottom-right corner, and on some screens a progress bar appears along the bottom for videos someone has partly watched. Keep your key text away from that corner.
Designing for small screens
Most people see your thumbnail at a fraction of its real size, in a phone list or a sidebar. A few habits that help it stay readable:
- Use three to five large words at most; thin fonts vanish when shrunk.
- Close-up faces and strong contrast read better than wide scenes.
- Check the result by viewing it small on your phone before uploading.
Need to add a title? Put it on with Add Text to Image after resizing. Working from a screenshot of the video? Tidy it up with Crop Image first.
Reusing one design across platforms
A 16:9 thumbnail at 1280×720 is also a useful starting point for other places your video is promoted. The same picture can be resized to a square for an Instagram post or to 1200×630 for a link preview with the presets on Resize Image. Keep your original design file, and make each version from it rather than from an already resized copy, so every one stays sharp.
More ways to use this tool
Frequently asked questions
What size should a YouTube thumbnail be?
1280×720 pixels in a 16:9 shape. YouTube also accepts smaller sizes down to 640 px wide, but 1280×720 looks sharper on large screens.
Why was my thumbnail rejected?
The most common reason is a file over 2 MB. Files made here are kept under that limit automatically. Also check that your account is verified in YouTube Studio.
Should I use JPG or PNG?
Both are accepted. JPG is usually much smaller at the same look, which is why it is preselected here.
Can I use a vertical phone photo?
Yes. Choose Crop to fill and drag to pick the area, or Fit with background to show the whole photo with bars at the sides.
Is my image uploaded here?
No. It is resized in your browser and only goes to YouTube when you upload it yourself.
Can I make the thumbnail from a frame of my video?
Yes. Pause the video, take a screenshot, crop away any player controls, then resize it here to 1280×720.