Cropping one profile photo for multiple platforms

Start with a high-quality original and keep the face or logo inside a generous central safe area. A square crop may be displayed as a circle elsewhere, so important details near the corners can disappear.

Export copies at each platform's required dimensions rather than repeatedly resizing a small version. Preview them at real avatar size and against light and dark backgrounds. Preserve the original for future recrops.

Which platform has the tightest crop?