What is CFF2?

CFF2 (Compact Font Format v2) is optimized for OpenType variable fonts with efficient data structures and support for font variations.

What is TTC?

TrueType Collection (TTC) bundles multiple TrueType fonts into a single file, commonly used for CJK (Chinese, Japanese, Korean) font families.

When Should You Use CFF2 vs TTC?

CFF2 vs TTC: Key Differences

• •The core technical difference: CFF2 relies on lossless compression whereas TTC uses lossless compression.
• •Neither format changes compression philosophy — both are lossless compression — so any size differences are due to encoding efficiency, not a shift in quality approach.
• •Alpha channel support: TTC lacks transparency support.
• •CFF2 files are typically 15-100KB per font while TTC files range 5-30MB for CJK font collections
• •CFF2 is optimized for variable fonts, opentype font production, advanced typesetting while TTC is designed for font distribution, cjk font collections — choose based on your specific workflow needs

Advantages of CFF2

• ✓At its core, CFF2 relies on lossless encoding — a design choice that makes it perfect for Variable fonts, OpenType font production, advanced typesetting.
• ✓You won't run into compatibility issues with CFF2 — it's a universal standard across platforms.
• ✓File size management with CFF2: larger files guaranteed to match the original exactly.
• ✓Every major application in the Variable fonts, OpenType font production, advanced typesetting space supports CFF2 natively.

Advantages of TTC

• ✓At its core, TTC relies on lossless encoding — a design choice that makes it perfect for Font distribution, CJK font collections.
• ✓You won't run into compatibility issues with TTC — it's a universal standard across platforms.
• ✓File size management with TTC: larger files guaranteed to match the original exactly.
• ✓Every major application in the Font distribution, CJK font collections space supports TTC natively.

Common Use Cases for CFF2 to TTC Conversion

• Logo design
• Data visualization
• Presentation design
• Video subtitles
• Game UI typography
• Website typography

Industry Applications

Best Practices for CFF2 to TTC Conversion

• →Converting CFF2 to TTC: check that glyph coverage is preserved — some formats have character limitations
• →Use TTC for cross-platform compatibility
• →Test fonts across different browsers and operating systems after conversion
• →Always keep a backup of your original files before converting
• →Choose the appropriate quality settings for your specific use case

Troubleshooting CFF2 to TTC Conversion

• !TTC font doesn't render correctly → check if TTC supports all glyphs present in CFF2
• !Licensing restrictions after CFF2 to TTC conversion → verify the font license allows format conversion
• !Hinting data lost converting CFF2 to TTC → some font formats like TTC may not preserve TrueType hinting
• !Special characters missing from converted TTC → font subsetting may have removed unused glyphs

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