Web Open Font Format (.WOFF)
WOFF (Web Open Font Format) is a web font format that wraps TrueType or OpenType font data with additional compression and metadata in a web-optimized container. It was developed by the W3C to provide a standardized, compressed font format specifically for web delivery. WOFF typically achieves 40% compression compared to raw TTF/OTF files.
Advantages of Web Open Font Format
What the WOFF format does well, and why you might choose it.
- Significantly smaller file sizes than TTF/OTF for faster web page loading
- Standardized by the W3C with universal browser support
- Includes metadata for licensing and font origin information
Limitations of Web Open Font Format
What the WOFFformat doesn't do well, and when to choose another format.
- Larger than WOFF2 which uses more efficient Brotli compression
- Not intended for desktop application use
- Requires decompression overhead when loading fonts
What WOFF files are used for
- Web font delivery via CSS @font-face rules
- Self-hosted web typography on websites and web applications
- Font distribution through web font services
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Frequently asked questions about WOFF
What is a .WOFF file?
WOFF (Web Open Font Format) is a web font format that wraps TrueType or OpenType font data with additional compression and metadata in a web-optimized container. It was developed by the W3C to provide a standardized, compressed font format specifically for web delivery. WOFF typically achieves 40% compression compared to raw TTF/OTF files.
What is the MIME type of WOFF?
The official MIME type for WOFF files is font/woff. This is the value web servers and applications use to identify the format when transferring files.
What category does WOFF belong to?
WOFF is a Font Converter format. Files in this category share common conversion paths and use cases.
How do I open a .WOFF file?
WOFF files are typically opened by software that natively supports the Web Open Font Formatformat. If you don't have a compatible application, the most reliable approach is to convert the file to a more universal format using the converters listed above. Most Web Open Font Format files convert to widely-supported alternatives in seconds.
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