What is PFM?

Printer Font Metrics (PFM) is the binary companion to PFB fonts for Windows, containing font metric data for printing.

What is AFM?

Adobe Font Metrics (AFM) is a text file describing Type 1 font metrics including character widths, kerning pairs, and bounding boxes.

When Should You Use PFM vs AFM?

PFM vs AFM: Key Differences

• •PFM uses lossless compression while AFM uses lossless compression — both take the same approach to file size management.
• •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
• •How transparency is handled: AFM supports transparency, so alpha information is preserved during conversion.
• •File sizes: PFM files typically range Very small, binary format and AFM files Very small, text-based metrics.
• •Use case fit: PFM targets windows postscript printing, font pairing and AFM targets postscript font metrics, pdf font embedding — your choice depends on which workflow stage you are serving.

Advantages of PFM

• ✓PFM uses lossless compression tailored for Windows PostScript printing, font pairing.
• ✓PFM is supported natively on virtually every device, browser, and operating system.
• ✓PFM files are bit-for-bit perfect, preserving every pixel and sample for professional work.
• ✓PFM integrates seamlessly with all major creative tools and workflows.

Advantages of AFM

• ✓AFM compresses data using lossless methods, keeping file sizes manageable for PostScript font metrics, PDF font embedding.
• ✓Industry-wide support means AFM files open anywhere — from legacy systems to the latest devices.
• ✓Lossless quality makes AFM the gold standard for archival and master copies.
• ✓From professional software to open-source alternatives, AFM works out of the box.

Common Use Cases for PFM to AFM Conversion

• Video subtitles
• Game UI typography
• Website typography
• Brand identity
• Print design
• Mobile apps

Industry Applications

Best Practices for PFM to AFM Conversion

• →Before converting PFM to AFM, review the font license — some licenses restrict format conversion
• →Check hinting data after conversion: AFM may handle TrueType hinting differently than PFM
• →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 PFM to AFM Conversion

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

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