Custom thumbnails are the single highest-leverage YouTube optimisation you can do. The platform's documented thumbnail size is 1280×720 at 16:9 with a 2 MB upload cap. Beyond that, YouTube downscales aggressively for low-bandwidth views — a clean 1280×720 source survives all of those downscales because YouTube starts from it.
Channel art is more complex than it looks: the 2560×1440 source is cropped differently for desktop, tablet, mobile and TV. The 'safe area' that always renders is the central 1546×423 — design important content (channel name, tagline) inside that.
Every size below links to a resize preset where one is available.
YouTube sizes — quick reference
Every image type YouTube renders in its native UI, with the recommended dimensions, aspect ratio and format.
| Image type | Dimensions | Aspect | Format | Max size | Resize |
|---|---|---|---|---|---|
Custom thumbnail Video | 1280×720 | 16:9 | JPG | 2 MB | Open → |
Channel banner / channel art Profile & branding | 2560×1440 | 16:9 | JPG | — | — |
Channel profile photo Profile & branding | 800×800 | 1:1 | JPG / PNG | — | — |
End screen graphic Video | 1280×720 | 16:9 | JPG / PNG | — | — |
Video
Custom thumbnail
1280×720 · 16:9 · JPG · max 2 MB
- 1280×720 is YouTube's official recommended dimension. Anything smaller gets upscaled and looks soft in the recommendations feed.
- Hard 2 MB cap — use JPEG q90 with the dedicated tool to land comfortably under.
End screen graphic
1280×720 · 16:9 · JPG / PNG
- Same dimensions as a thumbnail. Compose with the safe-from-overlay zones in mind: bottom-right and bottom-left often have end-card elements over them.
Profile & branding
Channel banner / channel art
2560×1440 · 16:9 · JPG
- Upload a 2560×1440 source — YouTube crops it differently for desktop, mobile and TV.
- The 'safe area' (always visible across devices) is the central 1546×423 region. Keep channel name and key text there.
Channel profile photo
800×800 · 1:1 · JPG / PNG
- Rendered at 98×98 next to video titles. Upload at 800×800 so retina renders stay crisp.
- Logos and faces render best — fine detail gets lost at the small display size.
YouTube — general tips
- Thumbnails are the highest-leverage YouTube SEO change you can make. Test variations — same video, different thumbnail, can show a 2× difference in CTR.
- YouTube re-encodes thumbnails on upload, but starts from your source — never let YouTube auto-pick from the video frames if you can help it.
- Animated thumbnails are available via the playlist preview for some account tiers, but the static thumbnail is the only one that appears in search and recommendations.
Frequently asked questions
- What size is a YouTube thumbnail?
- 1280×720 at 16:9 with a 2 MB upload cap. JPEG quality 90 lands you reliably under the cap with sharp results. Use the YouTube preset for a one-click resize.
- What is the safe area for YouTube channel art?
- The centre 1546×423 region of the 2560×1440 upload. Keep your channel name and any key text inside that area so it shows on mobile, tablet, desktop and TV.
- Why is my thumbnail too big?
- Almost certainly because it's a PNG. Convert to JPEG quality 90 — the same image is usually 5× smaller as a JPEG with no visible quality difference.
- Can I use PNG for thumbnails?
- Yes, but PNGs hit the 2 MB cap fast. JPEG q90 is the recommended format and is what YouTube re-encodes everything to internally anyway.
- Does YouTube allow animated thumbnails?
- Static thumbnails are what appear in search, recommendations, and external embeds — and only those affect click-through. Animated previews exist in some playlist contexts but don't replace the static image.