YouTube Profile Picture Downloader

YouTube stores one avatar per channel and serves it at whatever square size the page asks for, with the pixel count written into the image address as an s value: s48 beside a comment, s88 in search results, s176 on the channel page and s800 for the largest copy. They are the same picture resampled, not different uploads. This tool asks for the biggest one, so you get roughly 800 x 800 instead of the small copy your browser cached. A channel that uploaded a small file to begin with will still look soft at that size, because YouTube upscales rather than inventing detail.

The size lives in the address, so changing it is all it takes: find the part that reads =s88 or =s176 near the end of the image URL and replace the number with 800. That is exactly what this page does before the download, and it falls back to the address the API returned whenever a URL does not carry that pattern. Asking for a number above 800 usually returns an upscaled image rather than extra detail, since 800 x 800 is what YouTube recommends creators upload.

YouTube accepts a JPG, PNG, BMP or non animated GIF of at least 98 x 98 pixels and under 4 MB, and recommends 800 x 800. It is displayed as a circle everywhere, so keep faces and logos away from the corners, and check the result at 48 pixels before you commit: next to a comment is where most people will ever see it.

A YouTube API key is a free identifier from the Google Cloud console that lets an app read YouTube data. You don't need one here. The video thumbnail page never uses a key at all, since those images come straight from YouTube's image host (i.ytimg.com), and the channel, banner, profile picture and playlist pages fall back to a shared backend key. Your own key gives you a separate daily quota (Google grants each project 10,000 units a day for free), which is what you want if a lookup starts failing with a quota error after many searches in a row.

Your key never touches our server. It's sent directly from your browser to Google. For best safety, restrict your key in the Google Cloud console: under 'Application restrictions' choose 'HTTP referrers' and allow only this site's domain (e.g. https://youtube-thumbnail-download.app/*), and under 'API restrictions' allow only the YouTube Data API v3. That way, even if someone copies your key from your browser, they can't use it elsewhere.

In the Google Cloud console, open 'APIs & Services' > 'Credentials', click your API key, then under 'Application restrictions' choose 'HTTP referrers' and add the URL of this site. Under 'API restrictions', select 'YouTube Data API v3'. Save. Restrictions take effect within a few minutes.

The avatar belongs to the channel owner and often doubles as a trademark, so treat it like a logo. Showing it while you discuss that channel, in a review, a news item, a lesson or a comparison chart, is the kind of use that normally counts as fair use. Wearing it as your own avatar, or placing it where it suggests the creator endorses your product, is not, and that can be a trademark problem on top of a copyright one. Ask first whenever the use is commercial.