Safari 4.0.3 is a web browser developed by Apple Inc, available for download in full install version for Windows platforms from legacy sources. This version of Safari was officially released on 2009-08-11 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Safari 4.0.3 is built on Webkit 531.19.1 rendering engine and has been released with stability in Web page rendering. Now websites using HTML5 Video tags can be rendered much stabler than before. There has been issues notified about some web pages were displayed in grey scale in-place of colors and this bug has been fixed now. With this edition onwards Safari can be used in Windows 7 platform also in addition to XP and Vista.