The Digital Font Format Landscape
Digital typefaces exist in multiple formats, each optimized for a specific context. Choosing the right format affects web performance, app compatibility, and print quality.
TTF — TrueType Font
TrueType (.ttf) was developed by Apple and Microsoft in the 1980s. It's the most universally compatible format: Windows, macOS, Linux, Android, iOS, and all modern browsers. Includes hinting instructions for better screen rendering at small sizes.
OTF — OpenType Font
OpenType (.otf) is the professional evolution: up to 65,536 glyphs, ligatures, small caps, fractions, contextual alternates. Can contain PostScript (CFF) or TrueType outlines. Best for editorial design, multilingual fonts, professional typography.
WOFF and WOFF2 — Web Standards
WOFF (.woff): compressed TTF/OTF with zlib (~40% smaller) and licensing metadata.
WOFF2 (.woff2): Brotli compression, ~30% smaller than WOFF. The recommended web format in 2024.
@font-face {
font-family: 'MyFont';
src: url('font.woff2') format('woff2'),
url('font.woff') format('woff');
font-display: swap;
}
When to Use Each Format
| Context | Format |
|---|---|
| Modern website | WOFF2 |
| Desktop app (Win/Mac) | OTF |
| Professional print | OTF (CFF) |
| Android / mobile apps | TTF |
| Variable fonts | WOFF2 |
Variable Fonts
Variable fonts store multiple weights, widths, and styles in a single file:
body {
font-family: 'Inter Variable', sans-serif;
font-weight: 350; /* Any value 100–900 */
font-variation-settings: 'wght' 450, 'ital' 0.5;
}
Popular: Inter, Roboto Flex, Source Sans 3, Recursive — all on Google Fonts as WOFF2.
Obsolete Formats
- EOT: IE-only, obsolete. Skip.
- SVG Font: old Safari, obsolete. Skip.
Converting Between Formats
# TTF to WOFF2 using Google's official tool
woff2_compress myfont.ttf # output: myfont.woff2
Tools: FontForge (free), woff2 CLI (Google), Transfonter.org (web).
Conclusion
Use WOFF2 (with WOFF fallback) for all web projects. OTF for desktop and professional print. TTF as a universal fallback. Avoid EOT and SVG fonts entirely.
Advanced Use Cases
KaijuConverter is designed to cover the complete spectrum of file conversion needs in 2026. Beyond casual single-file use, professional workflows require consistency, reproducibility and privacy — characteristics a well-architected cloud service can offer without requiring dedicated software installation. Production environments: marketing, design, content, legal, education teams use conversion tools continuously — and for each case, the right format matters. PDF for legal distribution, DOCX for editable collaboration, HTML for web embedding, EPUB for ebooks, MP4 H.264 for universal video, AVIF for modern web images, FLAC for audio masters. Automation potential: although KaijuConverter is primarily an interactive interface, the concepts and best practices are the same you would apply in CI/CD pipelines with FFmpeg, ImageMagick, LibreOffice headless executed from scripts.
Best Practices and Professional Tips
Master + derivatives strategy: always keep the master file (maximum quality, lossless or editing format) in separate backup. Generate derivatives (converted, compressed, optimized versions) as needed — you can always regenerate from master, but never recover quality lost. Format selection matters: destination format should respond to a specific use case — universal distribution vs professional niche, web vs print, editing vs final delivery, archival vs disposable. Each format exists because it has an optimal point in some trade-off. Test before mass conversion: if you are going to convert 500 files to the same destination, first convert 1-2 representative files and verify the output (quality, size, compatibility with destination) before processing the complete batch. Metadata awareness: many formats preserve sensitive metadata (EXIF GPS in photos, document author in PDFs, system paths in logs) — clean before public distribution if privacy matters.
Compatibility and Technical Considerations
KaijuConverter processes conversions with cloud pipeline using industry-standard tools for each file type: FFmpeg 6.x for audio/video, ImageMagick 7.x and libvips for images, LibreOffice 7.6 headless for documents, Calibre 7.x for ebooks, p7zip 23.x for compressed archives, Pandoc 3.x for markup conversions. This combination guarantees maximum format compatibility and conversion quality. Cloud servers in Frankfurt optimized for low latency with European users (typical 20-50ms RTT), with auto-scaling at peak load and 99.9% uptime SLA. Privacy: TLS 1.3 encryption in transit, isolated Docker containers (cross-contamination impossible between sessions), automatic deletion after 2 hours with secure multi-pass overwrite — no data recovery possible. No tracking: we don't analyze content for training, don't share with third parties, don't use invasive ad networks. DRM limitation: DRM-protected files (Apple Music, Audible AAX, Netflix offline downloads, commercial Kindle KFX) cannot be processed — DRM blocks access to original stream by design. For those cases, you must obtain a legal DRM-free version before conversion.
Related conversions
Frequent conversions across the catalogue: