What is TTC?

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

What is OTC?

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

When Should You Use TTC vs OTC?

Use TTC When...

Reach for TTC when your priority is font distribution, cjk font collections — 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.

TTC vs OTC: Key Differences

•The core technical difference: TTC relies on lossless compression whereas OTC 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: OTC lacks transparency support.
•Storage footprint: 5-30MB for CJK font collections for TTC vs 5-30MB for font collections for OTC.
•TTC is optimized for font distribution, cjk font collections while OTC is designed for font distribution, font family packaging — choose based on your specific workflow needs

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.

Advantages of OTC

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

Common Use Cases for TTC to OTC Conversion

Data visualization
Presentation design
Video subtitles
Game UI typography
Website typography
Brand identity

Industry Applications

SignageIcon DesignBook PublishingMobile App DevelopmentWeb DesignTypography

Best Practices for TTC to OTC Conversion

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

!OTC font doesn't render correctly → check if OTC supports all glyphs present in TTC
!Licensing restrictions after TTC to OTC conversion → verify the font license allows format conversion
!Hinting data lost converting TTC 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

Related Font Converters

All Font Formats

View all Font converters →

More Font tools

Convert to OTC →Convert from TTC →

Convert TTC to OTC Online - Free & Fast

Convert TTC files to OTC online for free. High-quality conversion with no registration required.

Font Converter

Upload or enter a URL to convert TTC to OTC instantly

Click to upload or drag & drop TTC file

or paste from clipboard

.ttc,.TTC (max 100MB)

SSL EncryptedAuto-deleted in 1 hourProcessed securelyNo registration needed

Verifying security check…

About TTC and OTC

TTC

TTC (TTC collections) - TrueType Collection, multiple fonts in one file. Best for font distribution, cjk font collections.

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 font distribution, cjk font collections to font distribution, font family packaging

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

FAQs

Is converting TTC to OTC free?

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

How long does it take to convert TTC to OTC?

Most TTC 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 TTC to OTC?

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

Related Tools

View all font converter converters