WOFF/WOFF2 Formats

Fontisan supports the Web Open Font Format (WOFF and WOFF2).

Overview

WOFF and WOFF2 are web font formats optimized for use on websites:

• WOFF - Compressed version of TrueType/OpenType with metadata support
• WOFF2 - Improved compression using Brotli algorithm (typically 30% smaller than WOFF)

Converting to WOFF

require 'fontisan'

# Convert to WOFF
Fontisan.convert('font.ttf', output_format: :woff)

# Convert to WOFF2 (recommended for web)
Fontisan.convert('font.ttf', output_format: :woff2)

Metadata

WOFF files can contain extended metadata:

# Add metadata when converting
Fontisan.convert('font.ttf',
  output_format: :woff2,
  metadata: {
    unique_id: 'my-font-1.0',
    license: 'OFL',
    license_url: 'https://scripts.sil.org/OFL',
    description: 'My custom font'
  }
)

Extracting from WOFF

# Extract original font from WOFF
Fontisan.convert('font.woff', output_format: :ttf)
Fontisan.convert('font.woff2', output_format: :otf)

Compression Comparison

Format	Size (relative)
TTF/OTF	100%
WOFF	~70%
WOFF2	~50%

Related

• Font Conversion - General conversion guide