What is PFA?

PostScript Type 1 ASCII (PFA) is a human-readable printer font format used in professional typesetting and PostScript printing.

What is EOT?

Embedded OpenType (EOT) is a compact font format developed by Microsoft for embedding fonts in web pages using IE.

When Should You Use PFA vs EOT?

PFA vs EOT: Key Differences

• •PFA and EOT diverge on compression: lossless compression for the source, lossy compression for the target.
• •Converting from PFA to EOT changes compression type: lossy source becomes smaller but with some quality tradeoff.
• •Transparency: N/A — converting from PFA will merge transparency into a solid background
• •PFA files are typically 20-100KB per font while EOT files range Similar to WOFF, 30-50% smaller than TTF
• •PFA is optimized for professional printing, postscript devices while EOT is designed for legacy ie web fonts, older browser support — choose based on your specific workflow needs

Advantages of PFA

• ✓The lossless nature of PFA means file sizes stay reasonable while handling Professional printing, PostScript devices efficiently.
• ✓From mobile devices to enterprise servers, PFA is recognized and supported everywhere.
• ✓The trade-off for PFA's perfection is larger files — but for archival work, it is worth every megabyte.
• ✓PFA is a first-class citizen in all major software ecosystems, from creative suites to development environments.

Advantages of EOT

• ✓At its core, EOT relies on lossy encoding — a design choice that makes it perfect for Legacy IE web fonts, older browser support.
• ✓You won't run into compatibility issues with EOT — it's a universal standard across platforms.
• ✓File size management with EOT: aggressive compression with minimal visible quality loss.
• ✓Every major application in the Legacy IE web fonts, older browser support space supports EOT natively.

Common Use Cases for PFA to EOT Conversion

• Packaging design
• Signage systems
• Icon sets
• Logo design
• Data visualization
• Presentation design

Industry Applications

Best Practices for PFA to EOT Conversion

• →Before converting PFA to EOT, review the font license — some licenses restrict format conversion
• →Check hinting data after conversion: EOT may handle TrueType hinting differently than PFA
• →Verify that all character sets (Latin, Cyrillic, CJK, etc.) survived the conversion intact
• →Test the converted font in both a browser and a desktop application
• →Keep the original font file in case the conversion alters spacing metrics

Troubleshooting PFA to EOT Conversion

• !EOT font doesn't render correctly → check if EOT supports all glyphs present in PFA
• !Licensing restrictions after PFA to EOT conversion → verify the font license allows format conversion
• !Hinting data lost converting PFA to EOT → some font formats like EOT may not preserve TrueType hinting
• !Special characters missing from converted EOT → font subsetting may have removed unused glyphs

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