PFB to CID Converter

PFB (Printer Font Binary) is the compact binary representation of Adobe's PostScript Type 1 font format, introduced alongside PFA in 1984. Where PFA stores the entire font program as hex-encoded ASCII text, PFB wraps the same data in a lightweight binary container that uses segment headers to mark regions as ASCII or binary. The encrypted glyph outline section (eexec) is stored as raw bytes rather than hex characters, cutting the file size roughly in half compared to PFA. Each segment begins with a marker byte and a 32-bit length field, making the format simple to parse while still significantly more compact. PFB became the dominant Type 1 distribution format on Windows and DOS platforms, used in combination with PFM (Printer Font Metrics) or AFM files that supply the character width and kerning data needed for text layout. One advantage is storage and transfer efficiency — the binary encoding means a typical text font occupies 30-50 KB rather than the 60-100 KB its PFA equivalent would require. The segmented structure also allows PostScript interpreters to stream font data efficiently, processing ASCII and binary portions with their respective handlers. Adobe Type Manager (ATM) on Windows relied on PFB files to render smooth Type 1 text on screen, a capability that transformed desktop publishing on the PC platform. While OpenType fonts have largely replaced Type 1 for new work, PFB files persist in established print workflows, archival font libraries, and systems that depend on PostScript output.