| Error | Cause | Fix | |-------|-------|-----| | CID out of range | F3 mapping missing entries | Rebuild cidmap with Adobe script | | F2 not a valid subfont | Wrong byte order | Swap endianness with dd conv=swab | | Missing glyph in F1 | Incomplete base font | Replace F1 with same family original |
This issue typically surfaces when you attempt to view, print, or edit a PDF, and the text turns into unreadable gibberish, blank spaces, or throws a cryptic error like CIDFont+F1 missing .
gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=pdfwrite \ -dSubsetFonts=false -dEmbedAllFonts=true \ -sOutputFile=repacked.pdf input.pdf cid font f1 f2 f3 f4 repack
This post explains what the phrase "CID font F1 F2 F3 F4 repack" likely refers to, why it matters, how CID-keyed fonts work, how F1–F4 classifications are used in some font toolchains, what a “repack” means, and practical, safe, and legal ways to handle CID fonts. It’s written to help designers, typographers, PDF developers, and anyone who works with complex fonts and CJK (Chinese–Japanese–Korean) text.
A font is a format used primarily in PDF documents and advanced software interfaces to handle complex character sets. | Error | Cause | Fix | |-------|-------|-----|
Instead of mapping a character directly to a keyboard letter, a CID font uses a index number (Character ID) to point to a specific glyph in a massive database. What do F1, F2, F3, and F4 Mean?
You might need an when:
The goal of "repacking" is to take a PDF that displays placeholders like CIDFont+F1 and transform it into a fully functional document with properly embedded text. The process always involves the following steps:
A CID-keyed font cannot work alone. It relies on a second, critical component called a . The CMap acts as a bridge, mapping a character code (like the Unicode value for a specific Chinese character) to the correct CID number within the font. Together, the CID-keyed font and its CMap resources form a complete font system. However, this two-part requirement is also the source of the problems most users encounter. A font is a format used primarily in