When you download a YouTube thumbnail, you'll often see filenames like maxresdefault.jpg or hqdefault.jpg. These aren't random — they're specific names YouTube uses for each thumbnail size it automatically generates for every video. Here's exactly what each one means.
All YouTube Thumbnail Sizes at a Glance
| Name | Filename | Dimensions | Always Available? |
|---|---|---|---|
| Max Resolution | maxresdefault.jpg |
1280 × 720 | Sometimes |
| SD Default | sddefault.jpg |
640 × 480 | Yes |
| HQ Default | hqdefault.jpg |
480 × 360 | Yes |
| MQ Default | mqdefault.jpg |
320 × 180 | Yes |
| Default | default.jpg |
120 × 90 | Yes |
maxresdefault — Full HD (1280×720)
This is the highest resolution YouTube thumbnail available. It matches the standard 16:9 HD aspect ratio at 1280×720 pixels. However, it's not available for every video. Older videos uploaded before YouTube added HD support, and some low-view videos, may return a 404 error for this size. If you're downloading thumbnails and need HD, always check if this one loads — our tool shows you only the sizes that are actually available.
sddefault — Standard Definition (640×480)
At 640×480, this is a 4:3 aspect ratio thumbnail — which means it has black bars on the sides when displayed in a 16:9 context. It's reliably available on virtually all videos. For most practical uses — blog posts, reference images, mockups — this size is more than adequate.
Note on aspect ratio: Most YouTube thumbnails from sddefault downward are 4:3 (640×480, 480×360, 120×90), while maxresdefault and mqdefault are 16:9. This is a quirk of how YouTube generates its thumbnails.
hqdefault — High Quality (480×360)
Despite being called "high quality," hqdefault is actually the middle-of-the-road option at 480×360. The name is a legacy label from earlier YouTube days when this was the best available. It's always generated for every video and is a safe fallback if you need a thumbnail that's guaranteed to exist.
mqdefault — Medium Quality (320×180)
At 320×180, this is a 16:9 thumbnail but at low resolution. It's the size used in some mobile and embedded player contexts. Useful if you need a very small thumbnail for UI mockups or low-bandwidth situations.
default — Tiny Default (120×90)
The smallest thumbnail at 120×90 pixels. This is the size YouTube uses in its own search result lists and sidebar suggestions. At this resolution the image is very small and generally only useful for replicating YouTube's own UI design.
What Size Should I Download?
Here's a quick guide based on common use cases:
- Presentations, blog posts, design work:
sddefaultormaxresdefaultif available. - Competitor research / reference:
maxresdefault— you want to see it at full quality. - UI prototypes / mockups at small size:
mqdefaultorhqdefault. - Thumbnails for YouTube-style list UI:
default(120×90).
Frequently Asked Questions
Why does maxresdefault sometimes show a grey placeholder?
If a video doesn't have a high-resolution thumbnail, YouTube returns a generic grey placeholder image rather than a 404. This happens most often on older videos or channels that never uploaded a custom thumbnail. Our tool detects this and won't show you a placeholder as a valid download option.
What's the recommended size for uploading custom YouTube thumbnails?
YouTube recommends 1280×720 pixels (16:9), under 2MB, in JPG, GIF, BMP, or PNG format. This is what becomes the maxresdefault for your video.
Do YouTube Shorts have thumbnails?
Yes — Shorts use the same thumbnail URL structure. Our tool accepts Shorts URLs (youtube.com/shorts/[ID]) and extracts the thumbnail the same way.
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