What this can do
Check candidate URLs, visible availability, natural image dimensions, fallback order, and practical copy/open/download actions.
Thumbnail dimensions guide
YouTube Thumbnail Sizes
YouTube thumbnail sizes vary by video and candidate. TubeSnaps checks actual image dimensions so you can choose the best available preview image.
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Surface-aware output
Paste a URL, inspect candidates, then copy, open, or download usable outputs.
Try:
Common YouTube thumbnail candidates
| Candidate | Common expected size | Recommended use |
|---|---|---|
maxresdefault | 1280 x 720 | Best available HD choice when it exists. |
sddefault | 640 x 480 | Fallback for previews and editorial references. |
hqdefault | 480 x 360 | Reliable fallback for many videos. |
mqdefault | 320 x 180 | Small preview or lightweight reference. |
default | 120 x 90 | Tiny fallback only. |
Why actual dimensions matter
Filename alone does not prove quality. A high-resolution URL can be unavailable, and a missing candidate can return a small placeholder-like image. Check natural width and height before using a thumbnail in a blog hero, social post, or creator workflow.
How TubeSnaps labels size results
TubeSnaps loads public thumbnail candidates in the browser, reads natural dimensions, identifies 16:9 or 4:3 aspect ratios, and flags suspicious tiny results as placeholder suspected.
Related tools
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FAQ
Common questions
What size is maxresdefault?
When available, maxresdefault is commonly 1280 x 720 for a 16:9 thumbnail, but TubeSnaps checks the actual browser-loaded dimensions instead of assuming it exists.
Why is hqdefault often 480 x 360?
hqdefault is a common 4:3 fallback candidate. It may be reliable, but it is not always ideal for 16:9 hero images.
Which YouTube thumbnail size should I use?
Use maxresdefault when it is truly available and high-resolution. If not, try sddefault, hqdefault, mqdefault, then default based on actual dimensions and your use case.
How TubeSnaps checks this
Method and limitations
TubeSnaps builds known public thumbnail image candidates from the video ID, then lets your browser load each candidate and report whether it appears usable.
What it cannot guarantee
It cannot guarantee every video has maxresdefault, prove reuse permission, download YouTube videos, or bypass platform controls.
TubeSnaps does not download YouTube videos. Use outputs only for videos you own, have permission to use, or can lawfully reference. When the result matters for a client, publication, or commercial project, verify the source video and rights before reuse.
Update history
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Content reviewed
Reviewed browser-first behavior, source references, rights-aware wording, and practical limitations for this page.