What is an EOT file?
Embedded OpenType
- Developed By
- Microsoft
- Initial Release
- 1997
- MIME Type
- application/vnd.ms-fontobject
The Embedded OpenType (EOT) format is a legacy font file standard developed by Microsoft in 1997 specifically for use with Internet Explorer. It functions as a compact wrapper for TrueType (TTF) and OpenType (OTF) fonts, utilizing MicroType Express compression to reduce file size for web transmission. EOT files employ a proprietary structure that includes embedding permission flags to prevent unauthorized usage, adhering to Digital Rights Management (DRM) protocols. While submitted to the W3C in 2008, it was eventually superseded by WOFF, though it remains relevant for supporting older browser versions like IE8 and below.
How to open an EOT file
EOT files are designed exclusively for web rendering by the Trident layout engine found in Microsoft Internet Explorer. They are not intended for direct opening or installation on a local operating system like Windows or macOS. To view or edit the glyph data contained within an EOT file, users must convert it back to a TTF or OTF source format using specialized font engineering software such as FontForge or online conversion utilities.