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Supported Formats
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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 Legacy format superseded by Unicode OpenType.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 PS file and why was it central to early digital printing?
A PS file is a PostScript program that describes pages using vector commands, text operators, and device-independent imaging rules.
It allowed printers to render complex pages consistently regardless of hardware differences.
Before PDF became standard, PS was the backbone of professional publishing.
Why is PostScript considered a programming language rather than just a file format?
PS files contain executable instructions that manipulate a virtual graphics state.
They use stack-based commands to draw shapes, place text, and manage page layout.
This programmability allowed precise control unmatched by static formats.
Why did professional RIP systems rely heavily on PS files?
PostScript was designed by Adobe specifically for high-fidelity printing.
RIP engines executed PS commands to achieve exact vector rendering at any resolution.
This made PS the preferred input for typesetters and premium printers.
Why can PS files include both vector and raster graphics?
PostScript supports operators for drawing paths and embedding bitmap images.
This flexibility allowed mixed-content documents long before PDFs existed.
It provided publishers with a unified page description system.
Why were PS files commonly used for print proofs and prepress workflows?
PS preserved exact typographic geometry, colors, and layout instructions.
Print shops could inspect and test-run the PS program before plate production.
This reduced errors and maintained output fidelity.
Why do some PS files require specific printer drivers to interpret correctly?
Different PostScript levels introduced new operators and features.
Older printers may not understand advanced commands used by modern software.
Drivers ensure compatibility between the PS file and the target device.
Why do PS files sometimes render differently across interpreters?
Not all interpreters implement the full PostScript specification identically.
Differences in font substitution, halftoning, or color handling can change appearance.
Professional workflows often rely on Adobe’s reference interpreters to avoid inconsistencies.
Why can PS files embed whole font programs directly?
PostScript allows embedding Type 1, Type 3, and CID-keyed fonts inside the page description.
This guarantees that text renders identically even if the printer lacks the required font.
It was essential for multilingual and design-heavy documents.
Why do some software tools generate enormous PS files?
Poorly optimized applications may convert every element into verbose PostScript commands.
Bitmap-heavy documents inflate file size because raster data is encoded directly.
Modern export settings can improve efficiency dramatically.
Why was PostScript Level 2 a major upgrade for production printing?
Level 2 introduced improved memory handling, color management, and composite font support.
It allowed more efficient processing of complex pages and large documents.
These enhancements expanded PostScript’s capabilities for high-volume workflows.
Why do scientists and engineers still use PS for plotting and diagrams?
PS offers mathematically precise vector drawing that integrates easily with tools like MATLAB, Gnuplot, and LaTeX.
It creates publication-quality figures without raster artifacts.
The format is portable across computing environments.
Why do PS files often act as intermediates when creating PDFs?
PDF was built on the PostScript imaging model, so converting PS to PDF is straightforward.
Many publishing tools originally output PS which was distilled into PDF.
This pipeline remained standard for years in print workflows.
Why can PS files be edited manually even though they are complex?
PostScript is plain text, so its operators and coordinates are visible in a text editor.
Advanced users sometimes tweak parameters, colors, or paths directly.
This makes PS uniquely flexible among page description languages.
Why do some printers still accept PS files directly?
Many high-end laser printers and digital presses include native PostScript interpreters.
Sending PS directly bypasses intermediate rendering steps, improving accuracy.
This is especially useful for prepress environments.
Why is PS considered a legacy format today even though it is powerful?
PDF replaced PS by offering a fixed, non-executable page description safer for digital distribution.
Modern workflows generally prefer PDFs due to compactness and broader compatibility.
However, PS remains foundational for understanding and controlling professional printing pipelines.