If you need a specific size (like a high-res version for a presentation or a tiny thumbnail for an app), you can use GitHub's avatar parameters.
Append ?s=SIZE to the end of the URL. For example, https://github.com will fetch a 600x600 pixel version. GitHub supports sizes up to roughly 500-800px depending on the original upload. 3. Bulk Downloads for Developers
There are community-made scripts like github-profile-image-download that allow you to run a command like node download_avatars.js USER PROJECT to save all contributor images into a local folder.