YouTube Thumbnail Size & Dimensions
YouTube currently recommends 3840 × 2160 pixels for a video custom thumbnail, with a 16:9 aspect ratio and a minimum width of 640 pixels.
- Recommended size
- 3840 × 2160 px
- Aspect ratio
- 16:9
- Minimum width
- 640 px
Recommended YouTube thumbnail dimensions
Start with a 3840 × 2160 px canvas when preparing a new video thumbnail. A 1280 × 720 px image remains a common, lightweight 16:9 working or export size, but it is not YouTube's current recommended upload resolution.
A 16:9 canvas matches modern video playback. If the source artwork uses a different ratio, crop it deliberately or fit it inside the frame—stretching it changes proportions and makes faces, logos, and type look unnatural.
Thumbnail sizes exposed by YouTube
These are public delivery files, not upload recommendations. Individual availability and actual dimensions can differ.
maxresdefaultLargest available variantOften 1280 × 720, but dimensions can vary and it may not exist.sddefaultStandard definitionCommonly 640 × 480 and often uses a 4:3 frame.hqdefaultHigh qualityCommonly 480 × 360 and often uses a 4:3 frame.mqdefaultMedium qualityCommonly 320 × 180 in a 16:9 frame.defaultSmall defaultCommonly 120 × 90 and intended for compact placements.A missing maximum-resolution file does not mean the video has no thumbnail. It usually means YouTube only generated or exposed a smaller variant. The TubeThumbnail downloader checks each size before showing actions.
YouTube Shorts thumbnail size
For a custom Shorts thumbnail, YouTube recommends 2160 × 3840 px, a 9:16 aspect ratio, and a minimum height of 640 px. That vertical upload guidance is separate from the public thumbnail variants this site retrieves.
Make the image readable at every size
Compose safely
Keep faces, products, and essential words away from the edges. Leave room for cropping and interface overlays.
Limit the text
Use a short phrase, large letterforms, and generous spacing. Details that look fine at 1280 px can disappear on mobile.
Create contrast
Separate the focal subject from the background with light, color, scale, or negative space instead of visual clutter.
Test small
Review the design at realistic feed sizes before publishing, not only in a full-screen editor.
Image format and file size
YouTube's current upload guidance explicitly cites JPG and PNG. JPG is efficient for photos; PNG can preserve sharp graphics well but may produce a larger file.
TubeThumbnail also supports WEBP for local processing and export. That support is a TubeThumbnail capability, not a claim that YouTube recommends WEBP uploads.
Current limits vary by device: on mobile, video thumbnails are limited to 2 MB and podcast thumbnails to 10 MB; on desktop, video, Shorts, and podcast thumbnails can be up to 50 MB.
Size → Resize → Preview → Download
YouTube thumbnail dimensions, answered
What is the recommended YouTube thumbnail size?
YouTube currently recommends 3840 × 2160 pixels for a video custom thumbnail, with a 16:9 aspect ratio and a minimum width of 640 pixels.
What aspect ratio should a YouTube thumbnail use?
Use a 16:9 aspect ratio. It matches the shape of YouTube video players and most thumbnail placements.
Can I still use 1280 × 720?
Yes. It remains a common lightweight 16:9 working and export size, but it is not YouTube's current recommended upload resolution.
What happens if my thumbnail is not 16:9?
It may be cropped, letterboxed, or displayed with unused space depending on where it appears. Compose important content inside a 16:9 frame before uploading.
Why are some YouTube thumbnail resolutions unavailable?
YouTube does not expose every generated variant for every video. Source resolution, age, processing state, and video type can affect availability.
What format should I use for a YouTube thumbnail?
YouTube's current upload guidance explicitly cites JPG and PNG. TubeThumbnail also supports WEBP for local editing and export, but that is a tool capability rather than YouTube's stated upload recommendation.
What size should a YouTube Shorts thumbnail be?
For a custom Shorts thumbnail, YouTube recommends 2160 × 3840 pixels, a 9:16 aspect ratio, and a minimum height of 640 pixels.