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Supported Formats
Convert between all major file formats with high quality
Desktop Fonts
TrueType Font - universal desktop font format developed by Apple and Microsoft in the 1980s. Uses quadratic Bézier curves for glyph outlines. Excellent screen rendering with hinting technology. Works on all platforms (Windows, Mac, Linux). Supports Unicode with up to 65,536 glyphs. Standard desktop font format with maximum compatibility. Perfect for document embedding, desktop publishing, and cross-platform typography. Universal support in all operating systems and applications. Reliable choice for general-purpose font usage.
OpenType Font - modern font format jointly developed by Adobe and Microsoft (1996) extending TrueType. Uses cubic Bézier curves (PostScript outlines) allowing more complex glyph shapes. Supports advanced typography features (ligatures, alternate glyphs, contextual substitutions). Can contain up to 65,536 glyphs enabling comprehensive language support. Cross-platform compatibility (Windows, Mac, Linux). Industry standard for professional typography and multilingual documents. Perfect for print design, branding, and high-quality typography. Superior to TTF for complex scripts and advanced typographic features.
Mac Data Fork Font - legacy Macintosh font format storing TrueType/PostScript data in data fork. Used in Mac OS 9 and earlier. Phased out with Mac OS X transition to .ttf and .otf. Contains complete font data in single file (unlike resource fork fonts). Limited compatibility with modern systems. Convert to TTF or OTF for current macOS and cross-platform use. Historical format important for accessing old Mac fonts. Mainly encountered when migrating legacy Mac systems.
Compact Font Format - Adobe's space-efficient font outline format used within OpenType fonts. Stores glyph outlines using PostScript-based charstrings. More compact than TrueType outlines. Used in OTF fonts with PostScript outlines. Not standalone font file - embedded in OTF. Professional typography standard. Better compression than TTF outlines. Extract from OTF or work with complete OTF fonts.
CID-Keyed Font - Adobe font format for large character sets (Asian languages with thousands of characters). Character ID based system for efficient large font handling. Used in professional CJK (Chinese, Japanese, Korean) typography. Complex format requiring PostScript RIP support. Legacy format superseded by Unicode OpenType. Convert to modern OTF with Unicode mapping for compatibility. Important for accessing legacy Asian language fonts.
Spline Font Database - FontForge's native font format. Editable font source format storing complete font data including editing information. ASCII or binary format with full font metadata. Used in font design and development. Convert to TTF/OTF for deployable fonts. Perfect for font design workflow. Maintains complete font development history. FontForge is free open-source font editor.
Unified Font Object - open source font source format (XML-based directory structure). Developed by font tool creators for interoperability. Stores complete font design data in human-readable XML. Used by modern font editors (RoboFont, Glyphs, FontForge). Perfect for font development and version control. Industry standard for open font source files. Compile to TTF/OTF for distribution. Excellent for collaborative font design.
Web Formats
Web Open Font Format - font format specifically designed for web use (2009). Compressed TrueType/OpenType fonts reducing file size by ~40%. Supported by 99% of browsers (Chrome, Firefox, Safari, Edge). Includes metadata for licensing and font information. Perfect for website typography ensuring consistent rendering across devices. Industry standard for web fonts. Faster page loads than raw TTF/OTF. Essential for modern web design and custom typography. Recommended for broad web compatibility.
WOFF 2.0 - improved web font format (2014) with better compression using Brotli algorithm. 30% smaller than WOFF with faster decompression. Supported by all modern browsers (96%+ global coverage). Maintains WOFF's metadata and licensing features. Superior performance for web typography. Recommended format for modern websites. Falls back to WOFF for older browsers. Essential for optimizing website performance and reducing bandwidth. Default choice for contemporary web development.
Embedded OpenType - proprietary web font format developed by Microsoft for Internet Explorer. Compressed and subset fonts with DRM protection. Only supported by Internet Explorer (legacy browser). Obsolete format replaced by WOFF/WOFF2. Historically important for web fonts (1997-2010s). Still encountered in legacy websites. Not recommended for new projects. Convert to WOFF2/WOFF for modern browsers. Maintained only for backward compatibility with old IE versions.
SVG Font - vector-based font format embedded in SVG files. Defines glyphs as SVG paths allowing colors, gradients, and effects. Deprecated for web use in favor of WOFF. Limited browser support (only Safari supports SVG fonts). Larger file sizes than outline fonts. Mainly historical format. Useful for special effects and colored fonts. Modern alternative: OpenType-SVG. Not recommended for general use. Better options: WOFF2 with icon fonts or OpenType color fonts.
Specialized Formats
PostScript Font Binary - Adobe Type 1 binary format for professional printing (1984). Contains glyph outlines in PostScript language. Excellent print quality with precise curves. Requires corresponding PFM or AFM metrics file. Standard in professional publishing and printing industry. Limited to 256 glyphs (single-byte encoding). Being replaced by OpenType. Still used in legacy publishing workflows. Convert to OTF for modern compatibility while preserving PostScript quality.
PostScript Font ASCII - Adobe Type 1 ASCII variant of PFB format. Human-readable PostScript code defining font outlines. Used for font development and debugging. Less efficient than PFB binary format. Requires PFM or AFM metrics file. Same quality as PFB for printing. Legacy format for professional typography. Convert to OTF for modern systems. Primarily historical significance in desktop publishing evolution.
Printer Font Metrics - Windows metrics file for Type 1 PostScript fonts. Contains font measurements (character widths, kerning pairs, bounding boxes). Required companion to PFB/PFA for proper rendering on Windows. Text file format with font metrics data. Does not contain glyph outlines. Legacy format from Windows 3.1/95 era. Used with PFB for complete Type 1 font installation. Modern OpenType fonts include metrics internally. Convert Type 1 fonts to OTF to consolidate metrics and outlines.
Adobe Font Metrics - Adobe's metrics format for Type 1 PostScript fonts. Contains character widths, kerning pairs, ligatures, and bounding boxes. ASCII text format readable by humans and applications. Companion to PFB/PFA outline files. Used by font design tools and professional publishing software. Essential for proper font spacing and kerning. Legacy format with historical importance in digital typography. Modern fonts embed metrics in OTF format. Convert to OpenType for integrated metrics and outlines.
Binary Font File - generic binary font data format used by various font tools and editors. Contains raw font outline data without specific format wrapper. Used in font development and conversion pipelines. Requires specific tools to process. Not a standard end-user format. Intermediate format in font creation workflow. Convert to TTF or OTF for usable fonts. Primarily relevant in font design and development contexts.
Mac Suitcase Font - legacy Macintosh font container (Mac OS Classic) storing multiple fonts in one file. Contains TrueType or PostScript fonts in resource fork. Used with Font Suitcase format (.suit extension). Obsolete with Mac OS X migration. Poor compatibility with modern systems. Required Font/DA Mover for installation on old Macs. Extract individual fonts and convert to TTF/OTF for modern use. Important for recovering fonts from classic Mac archives and systems.
PostScript Font Program - Adobe PostScript Type 1 font in PostScript language format. Contains font outlines as PostScript code. Used for printer font downloads and font development. Human-readable but inefficient. Legacy format from desktop publishing era. Convert to OTF for modern usage. Historical importance in professional typography. Mainly encountered in old publishing workflows.
PageMaker 3 Font - legacy font format from Aldus PageMaker 3.0 (1980s desktop publishing). Proprietary format specific to early PageMaker versions. Obsolete format with no modern support. Important only for recovering old PageMaker documents. Convert to TTF/OTF if font data recoverable. Historical artifact from desktop publishing evolution. Better alternatives available for all uses.
Type 11 Font - variant of PostScript CID-Keyed font format. Used for complex fonts with large character sets. Legacy format for Asian language fonts. Limited modern support. Convert to Unicode OpenType for compatibility. Historical format in CJK font development. Modern alternatives handle large character sets better with Unicode.
Type 42 Font - PostScript font format wrapping TrueType outlines. Hybrid format combining PostScript wrapper with TrueType data. Used for downloading TrueType fonts to PostScript printers. Primarily printer-internal format. Limited end-user relevance. Convert underlying TrueType to TTF/OTF. Historical bridge between TrueType and PostScript worlds.
How to Convert Files
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Frequently Asked Questions
What is a WOFF2 file and how does it improve on the original WOFF format?
WOFF2 is a next-generation web font format that uses Brotli compression to greatly reduce file size compared to WOFF.
It restructures font tables before compression to achieve higher efficiency without degrading glyph quality.
The result is a faster, lighter, and more optimized font designed specifically for modern web performance.
Why does WOFF2 load faster than other web font formats?
Brotli compresses font data more aggressively than gzip-based methods used in WOFF.
This allows browsers to download significantly smaller payloads, especially for large families.
Better network utilization leads to quicker text rendering and earlier content visibility.
Why is WOFF2 considered the most efficient font format for websites today?
It produces up to 30–50% smaller files than WOFF and far smaller than raw TTF/OTF.
Its internal table transformations allow compression ratios unavailable in older formats.
For modern browsers, WOFF2 offers the best balance of speed, coverage, and reliability.
Why do modern design systems default to WOFF2 for production environments?
Frameworks like Next.js, Astro, Hugo, and SvelteKit automatically emit WOFF2 during build pipelines.
Serving WOFF2 ensures minimal font overhead on mobile and low-bandwidth networks.
This optimization supports high Core Web Vitals scores and SEO improvements.
Why does WOFF2 reduce layout shifts more effectively than older font formats?
Its smaller size shortens the delay before initial glyph availability.
Faster decoding reduces the time between initial paint and final text rendering.
This limits FOIT and FOUT issues, stabilizing page layout early in the load process.
Why is Brotli essential to WOFF2’s compression strategy?
Brotli’s dictionary-based model is highly effective at detecting repeated patterns in font tables.
It compresses curves, metrics, and glyph instructions with extraordinary density.
This results in substantial savings, particularly for multilingual or feature-rich typefaces.
Why do some enterprise systems still hesitate to adopt WOFF2 exclusively?
Legacy browsers predating 2015 do not support Brotli or WOFF2 decoders.
Large organizations often maintain compatibility with embedded browsers in older hardware.
WOFF remains a fallback to ensure universal access in mixed environments.
Why do WOFF2 fonts sometimes decode faster even though they’re more compressed?
WOFF2 optimizes the structure of font tables before compression, simplifying the decompression process.
Brotli decompression is extremely efficient on modern CPUs and mobile processors.
The combination yields smoother, faster font activation.
Why do analytics show reduced bandwidth usage after switching to WOFF2?
File size reductions directly lower CDN transfer costs and user data consumption.
Sites with heavy typography—multiple weights or multilingual scripts—benefit the most.
This optimization is especially impactful on mobile-first markets.
Why is WOFF2 particularly effective for variable fonts?
Variable fonts contain extensive data in a single file, making compression critical.
Brotli maximizes compression on repetitive axis and outline data used in variable technology.
This keeps variable font deployments practical for real-world websites.
Why do major CDN providers prioritize WOFF2 caching?
CDNs detect WOFF2 as a high-value static asset and apply long-term caching strategies.
Small file sizes make global edge replication cheaper and faster.
This results in near-instant loading for returning visitors.
Why do privacy-focused browsers treat WOFF2 as a minimal fingerprinting vector?
WOFF2 hides internal font structure behind compressed packaging, revealing less metadata than raw formats.
It limits the ability to probe font internals for unique identification markers.
This strengthens privacy protections without sacrificing display quality.
Why do UI libraries incorporate WOFF2 when optimizing for modern performance metrics?
Smaller fonts reduce render-blocking resources and improve Largest Contentful Paint (LCP).
They also reduce Cumulative Layout Shift (CLS) by enabling earlier text stability.
These improvements directly influence search ranking and user engagement.
Why is WOFF2 considered a future-proof format for the web?
It is supported by all modern browsers and aligned with long-term standards from W3C.
Its compression method remains highly efficient even as font families become more complex.
Given ongoing industry adoption, WOFF2 is expected to remain the dominant web font format.
Why should developers keep both WOFF and WOFF2 in their font stacks?
WOFF2 provides the fastest performance, but WOFF guarantees compatibility with older systems.
Serving both ensures optimal results across a wide range of browsers and devices.
This layered approach preserves accessibility while maximizing speed for modern users.