Every YouTube video has a predictable thumbnail URL structure. If you know the video ID, you can construct any thumbnail URL manually.

The URL Pattern

YouTube serves thumbnails from img.youtube.com using this pattern:

https://img.youtube.com/vi/{VIDEO_ID}/{FILENAME}

Where {VIDEO_ID} is the 11-character ID from the YouTube URL (e.g., dQw4w9WgXcQ) and {FILENAME} is one of:

  • default.jpg — 120×90
  • mqdefault.jpg — 320×180
  • hqdefault.jpg — 480×360
  • sddefault.jpg — 640×480
  • maxresdefault.jpg — 1280×720

How to Find the Video ID

The video ID is the 11-character string after v= in a YouTube URL:

https://www.youtube.com/watch?v=dQw4w9WgXcQ

For short links, it's the part after youtu.be/:

https://youtu.be/dQw4w9WgXcQ

Use Tube Fetch for Instant Access

Rather than constructing URLs manually, Tube Fetch extracts the video ID automatically and generates all five thumbnail URLs for you in one click.