OpenType fonts are cross-platform and will work on both Macs and PCs. This format is best used with applications that support OpenType features, such as InDesign. Some OpenType fonts are created with PostScript metrics and others are created with TrueType metrics. Postscript flavored OpenType have .otf ending while TrueType flavored OpenType have .ttf endings.

TrueType fonts will also work on both Macs and PCs. Certain Windows-based applications, such as MS Office, work best with this format because these applications have limited OpenType support.

PostScript fonts only work on either a Mac or a PC, not both. This format is also referred to as Type 1 font. It is an older format that can be difficult to install in newer operating systems.

Webfonts come in EOT/WOFF formats, which use @font-face to embed the font into your site.

To learn more about formats visit Help Topics/ Font Format Questions