WOFF & WOFF2

Web Open Font Format (WOFF and WOFF2) are optimized for web delivery.

Overview

Format	Compression	Browser Support
WOFF	zlib	All modern browsers
WOFF2	brotli	Modern browsers

WOFF2 Benefits

• 30-50% smaller than TTF/OTF
• Preprocessing transforms for better compression
• Modern browser support

Converting to WOFF

# From TTF
fontisan convert font.ttf --to woff --output font.woff

# From OTF
fontisan convert font.otf --to woff --output font.woff

Converting to WOFF2

# From TTF
fontisan convert font.ttf --to woff2 --output font.woff2

# From OTF
fontisan convert font.otf --to woff2 --output font.woff2

# From Type 1
fontisan convert font.pfb --to woff2 --output font.woff2

API Usage

options = Fontisan::ConversionOptions.from_preset(:web_optimized)
# From: :otf, To: :woff2
# generating: { compression: "brotli", transform_tables: true }

Fontisan::FontWriter.write(font, 'font.woff2', options: options)

Compression Options

brotli (WOFF2)

generating: { compression: "brotli" }

Best compression ratio.

zlib (WOFF)

generating: { compression: "zlib" }

Wide compatibility.

Table Transforms

WOFF2 supports table transformations:

Table	Transform
glyf	Combined with loca
hmtx	Combined with hhea
CFF	De-subroutinization

options = Fontisan::ConversionOptions.new(
  to: :woff2,
  generating: { transform_tables: true }
)

Converting from WOFF

# WOFF to TTF
fontisan convert font.woff --to ttf --output font.ttf

# WOFF2 to OTF
fontisan convert font.woff2 --to otf --output font.otf

Browser Support

Browser	WOFF	WOFF2
Chrome	5+	36+
Firefox	3.6+	35+
Safari	5.1+	12+
Edge	All	14+
IE	9+	—

Best Practices

1. Use WOFF2 primarily — Best compression
2. Provide WOFF fallback — For older browsers
3. Keep original — For editing
4. Preserve metadata — Unless stripping for size