Thumbnail troubleshooting

Most "the downloader gave me a tiny blurry image" reports trace back to one of five causes — and four of them are facts about the video, not faults in any tool. Work through this list in order.

1. The file is exactly 120×90 — you got the placeholder

When a video doesn't have the size you asked for, YouTube's CDN returns a 120×90 placeholder JPEG at that address instead of an error. If you downloaded by hand, check the saved file's dimensions: 120×90 means "that size doesn't exist for this video". ThumbFetch checks this for you — the card would have said no HD thumbnail and disabled the button. The fix is not a different tool; it's a smaller size. Use hqdefault (480×360), which exists for essentially every public video.

2. The video predates HD thumbnails, or was uploaded at low resolution

The 1280×720 size only exists when the source material supported it: an HD-era upload, or a creator-uploaded custom thumbnail. A large share of pre-2010 and low-resolution uploads simply never had one generated, and no tool can recover an image YouTube doesn't hold. This is the most common cause of case 1.

3. The video is private, deleted, or age/region restricted

Only public and unlisted videos have publicly reachable thumbnails. If every size fails or shows the placeholder — including default.jpg, which exists for every public video — the video itself is most likely not public. Check that the link opens the video in a private/incognito window where you're not signed in.

4. The link or ID is malformed

Video IDs are exactly 11 characters from A–Z a–z 0–9 - _ and are case-sensitive: dQw4w9WgXcQ and dqW4W9WGXCQ are different addresses. Truncated links from chat apps (which sometimes eat trailing characters) are a classic cause of "video not found" results. The downloader rejects anything that doesn't resolve to a valid 11-character ID and tells you, rather than guessing.

5. The thumbnail changed, but you see the old one

Creators can replace a thumbnail at any time, and the CDN address doesn't change — so caches serve the old image for a while. If you fetched a thumbnail right after the creator updated it, hard-refresh or wait and fetch again. Your download is whatever the CDN serves at that moment; this site keeps no copy of its own.

Still stuck?

• Confirm the video plays publicly while you're signed out.
• Try the bare 11-character ID in the downloader instead of a full link.
• Accept HQ (480×360) as the ceiling for that video — for most older uploads, that is genuinely the largest thumbnail in existence.

Background reading: the five sizes and the placeholder trap · step-by-step download guide.