YouTube aspect ratios and image sizes
YouTube is a 16:9 platform with one large exception: Shorts are 9:16. Everything else — thumbnails, banners, end screens — hangs off those two shapes.
The numbers
| Asset | Ratio | Pixels | Notes |
|---|---|---|---|
| Standard video (1080p) | 16:9 | 1920 × 1080 | The safest default upload for most channels. |
| Standard video (720p) | 16:9 | 1280 × 720 | Minimum size that still looks acceptable full-screen. |
| Standard video (1440p) | 16:9 | 2560 × 1440 | Unlocks a higher-quality codec tier on many uploads. |
| Standard video (4K) | 16:9 | 3840 × 2160 | 4K UHD. See the 4K page for the DCI variant. |
| Video thumbnail | 16:9 | 1280 × 720 | The documented recommendation; 640 px is the stated minimum width. |
| Shorts | 9:16 | 1080 × 1920 | Vertical, full-screen. Square or 16:9 clips get letterboxed. |
| Channel banner | 16:9 | 2048 × 1152 | Commonly recommended upload size; keep text inside a centred safe area of roughly 1235 × 338. |
| Profile picture | 1:1 | 800 × 800 | Displayed as a circle, so keep the subject centred. |
Ratios on YouTube are stable; exact pixel recommendations drift as the apps are redesigned. If a number here disagrees with YouTube's current help pages, trust the ratio and follow their pixel count.
Calculator
Presets below are the three shapes YouTube actually uses. Type a width or height and the other side follows.
Nearest standard resolutions
Thumbnails: why 1280 × 720
The thumbnail is displayed at wildly different sizes — a few hundred pixels wide in a sidebar, nearly full width on a TV, and roughly 30 px tall in a mobile search row. 1280 × 720 is large enough to stay sharp on the biggest placement while staying inside the upload size limit. What matters more than the pixel count is that it is exactly 16:9: an off-ratio thumbnail gets centre-cropped, and the text you carefully placed near the edge disappears.
Practical rules that follow from the geometry: keep any text inside the middle 80% of the frame, use a font size that is still legible when the image is scaled to about 20% of its width, and remember that a duration badge sits over the bottom-right corner. If you design at 1920 × 1080 instead, that is fine — it is the same ratio and YouTube will downscale it.
Shorts vs. regular video
Shorts fill a phone screen vertically at 9:16, which is 1080 × 1920. A video is treated as a Short based on its length and ratio, so a 9:16 upload that runs long is simply a tall regular video, and it will appear pillarboxed with heavy black bars on desktop. If you are repurposing a horizontal edit, do not letterbox a 16:9 frame into a 9:16 canvas — you end up with a small strip of picture and two thirds empty. Reframe instead: crop to 9:16 and reposition the subject, or build a stacked layout with the video in the upper third and text below.
To find the crop, enter your source width and height with the lock off to confirm the ratio, then switch to the 9:16 preset with the lock on and type your target height of 1920. The width comes out at 1080 — which is how much of your original frame's width survives once you match heights.
Non-16:9 uploads
YouTube's player adapts to the video's ratio rather than forcing 16:9, so a 4:3 or 1:1 upload plays without hard-coded bars in the player itself. But thumbnails, feed cards and the recommendation rail are all 16:9, so a square video still gets a 16:9 card. Cinema ratios such as 2.39:1 will show thin bars above and below inside the 16:9 player. If you are delivering scope footage, encode it inside a 1920 × 1080 frame with the bars baked in rather than uploading a 1920 × 803 file, which some players handle inconsistently.
Frequently asked questions
What size should a YouTube thumbnail be?
1280 × 720 pixels, which is 16:9. YouTube states 640 px as the minimum width; anything smaller looks soft on large screens. Any exact 16:9 size works — 1920 × 1080 is equally valid and gives you more room to work in.
Can I upload a vertical video that is not a Short?
Yes. Length and format determine whether YouTube treats it as a Short. A long vertical video plays in a tall player on mobile and pillarboxed on desktop. It is a legitimate choice for interview or tutorial content aimed at phone viewers, but it wastes most of a TV screen.
Why does my thumbnail look cropped?
It is not 16:9. Anything taller or wider gets centre-cropped to fit the card. Run the numbers through the calculator above with the lock off — if the ratio does not read 16:9, that is your answer.
Is 4K worth uploading if most viewers watch on a phone?
Often yes, for a reason unrelated to resolution: YouTube allocates more bitrate to higher-resolution uploads, so a 4K source can look cleaner even when watched at 1080p. The ratio is identical (16:9), so it costs you nothing in framing — only in file size and upload time.
What is the safe area on a channel banner?
The banner is cropped very differently on TV, desktop and mobile — TV shows the whole 16:9 image, desktop shows a wide strip, mobile shows less again. The commonly cited text-safe region is about 1235 × 338 px centred in a 2048 × 1152 upload. Keep your channel name and logo inside that box and treat everything outside it as decoration that may be cut.
Do end screens and cards have their own ratio?
End screen elements are laid out relative to the 16:9 frame, and the layout tool reserves the final 5–20 seconds. The practical constraint is compositional, not mathematical: leave the outer edges of your last shot uncluttered so the element boxes do not cover a face or the main text.
Use cases & limitations
- Batch thumbnail templates. Build one 1280 × 720 template and every export is automatically correct.
- Repurposing horizontal to vertical. Use the calculator to see exactly how much horizontal frame you lose when matching heights.
- Checking a client's assets. Paste their file dimensions in with the lock off; if the ratio is not 16:9 or 9:16, it will be cropped somewhere.
- Limitation: this page describes shapes and sizes only. It cannot tell you about file size caps, codec requirements or length limits, all of which change more often than ratios do.
- Limitation: banner safe areas are approximations of a layout that YouTube redesigns periodically. Always preview on desktop, mobile and TV before committing.