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 OTC?

OpenType Collection (OTC) bundles multiple OpenType fonts into one file, similar to TTC but for OpenType format.

When Should You Use CFF2 vs OTC?

Use CFF2 When...

Reach for CFF2 when your priority is variable fonts, opentype font production, advanced typesetting — its uncompromising quality ensures every detail is preserved.

Use OTC When...

Reach for OTC when your priority is font distribution, font family packaging — its uncompromising quality ensures every detail is preserved.

CFF2 vs OTC: Key Differences

•CFF2 and OTC diverge on compression: lossless compression for the source, lossless compression for the target.
•Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
•Transparency: N/A
•File sizes: CFF2 files typically range 15-100KB per font and OTC files 5-30MB for font collections.
•CFF2 is optimized for variable fonts, opentype font production, advanced typesetting while OTC is designed for font distribution, font family packaging — choose based on your specific workflow needs

Advantages of CFF2

✓CFF2 compresses data using lossless methods, keeping file sizes manageable for Variable fonts, OpenType font production, advanced typesetting.
✓Industry-wide support means CFF2 files open anywhere — from legacy systems to the latest devices.
✓Lossless quality makes CFF2 the gold standard for archival and master copies.
✓From professional software to open-source alternatives, CFF2 works out of the box.

Advantages of OTC

✓OTC applies lossless compression specifically calibrated for Font distribution, font family packaging.
✓OTC enjoys broad native support across operating systems, browsers, and creative tools alike.
✓OTC guarantees every bit of the original data survives — no approximations, no shortcuts.
✓You will find OTC support built into virtually every tool that handles Font distribution, font family packaging — no plugins or converters needed.

Common Use Cases for CFF2 to OTC Conversion

Website typography
Brand identity
Print design
Mobile apps
Desktop publishing
E-book formatting

Industry Applications

Web DesignTypographyGraphic DesignDesktop PublishingApp DevelopmentBrand Design

Best Practices for CFF2 to OTC Conversion

→Converting CFF2 to OTC: check that glyph coverage is preserved — some formats have character limitations
→Use OTC 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 OTC Conversion

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

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About CFF2 and OTC

CFF2

CFF2 (CFF2) - Compact Font Format v2, PostScript-based outlines for OpenType variable fonts. Best for variable fonts, opentype font production, advanced typesetting.

OTC

OTC (OTC collections) - OpenType Collection, multiple OpenType fonts bundled. Ideal for font distribution, font family packaging.

Format Comparison

CompressionLossless → Lossless

TransparencySupported

Use CaseConvert from variable fonts, opentype font production, advanced typesetting to font distribution, font family packaging

File Size~5-30MB for font collections after conversion

FAQs

Is converting CFF2 to OTC free?

Yes, GoConvertFile offers free conversion of CFF2 to OTC for files up to 100MB. No registration required.

How long does it take to convert CFF2 to OTC?

Most CFF2 to OTC conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is OTC best used for?

OTC is ideal for font distribution, font family packaging. OpenType Collection, multiple OpenType fonts bundled

What file size should I expect after converting CFF2 to OTC?

File size after CFF2 to OTC conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

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