أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Portable Network Graphics (PNG) for photos and Graphic Interchange Formats (GIF) for vector images or for flash videos.. jpeg? that could be heavy...
Jpeg seems to the standard thought png and gif are now common place and supported by new browsers
I think both JPEG or PNG are best for photos using in website.