YouTube thumbnail size and specs: the complete checklist
· 5 min read
Your thumbnail is the first thing a viewer sees, and YouTube shows it at many sizes: a big card on a TV, a small tile in a phone's suggested list. Getting the technical specs right means it looks sharp everywhere. Here is the checklist.
The short answer
| Spec | Use this |
|---|---|
| Size | 1280 × 720 pixels |
| Aspect ratio | 16:9 |
| Minimum width | 640 pixels |
| File format | JPG or PNG (GIF also works, but it won't animate) |
| File size | Keep it under 2 MB |
1280 × 720 is the size YouTube recommends. It's the same 16:9 shape as the video player, so your thumbnail fills the frame without black bars or cropping.
Why 1280 × 720 and not bigger?
A larger image doesn't look better on YouTube, because thumbnails are scaled down for every surface they appear on. A bigger file mostly means a slower upload and a higher chance of hitting the size limit. If you design at a larger 16:9 size (for example 1920 × 1080), export a copy at 1280 × 720 before uploading.
Going smaller is the real risk. Below 640 pixels wide YouTube won't accept the image, and anything between 640 and 1280 can look soft on large screens.
File format and size
- JPG is the safe default. It keeps photos small and looks good at quality 80–90.
- PNG is lossless and good for flat graphics and text, but files get big quickly. Check the size before you upload.
- Stay under 2 MB. It's the long-standing limit and is accepted everywhere you can upload a thumbnail. If a PNG is too large, export it as a JPG.
Mind the safe zones
YouTube draws on top of your thumbnail in several places:
- The video length sits in the bottom-right corner. Never put a key word or a face there.
- On some surfaces, a progress bar runs along the bottom for videos the viewer has started.
- On phones, rounded corners trim the very edges.
Keep text and faces away from the bottom-right corner and from about 5% around the edges.
Test it at the size people actually see
Most views come from phones, where a thumbnail in a suggested list can be only about 160–200 pixels wide. Before you upload:
- Shrink the image to about 15% of its size (roughly 190 × 107 pixels) and look at it on your screen.
- Can you still read every word? Can you tell what the image is about in one second?
- If not, cut words, make the text bigger, or simplify the background.
This one check catches most thumbnail problems. Text that looks fine in your design tool often disappears at real size.
Custom thumbnails need a verified account
You can only upload a custom thumbnail once your YouTube account is verified. If the option is missing in YouTube Studio, check your channel's feature eligibility under Settings → Channel → Feature eligibility.
Checklist before you upload
- 1280 × 720, 16:9
- JPG or PNG, under 2 MB
- Nothing important in the bottom-right corner
- Readable at phone size (try the 15% test)
- It works together with your title (see how to make thumbnails people click)
Leovexa exports every thumbnail at 1280 × 720 and under 2 MB, with big text designed to survive the phone-size test, so the specs are handled for you.