What size is a GitHub avatar?

420×420 pixels displayed; upload square source.

Repository social preview image?

1280×640 px in repo Settings → Social preview.

GitHub allows animated GIF profile images within size limits.

platform · image

GitHub profile avatar and repository social preview dimensions. 420×420 avatar, 1280×640 repo image.

Updated 2026-05-21

Asset	Size	Max file	Formats
avatar	420×420	1024 KB	jpg, png, gif
social_preview	1280×640	2048 KB	jpg, png

Official source · verified 2026-05-21

Square avatar; GIF allowed for profile.

What size is a GitHub avatar?: 420×420 pixels displayed; upload square source.
Repository social preview image?: 1280×640 px in repo Settings → Social preview.
GIF avatars?: GitHub allows animated GIF profile images within size limits.