Cidfont F1 F2 F3 F4 Gratis -

When certain software creates or edits a PDF and the original font data is not embedded (or is restricted by copyright), the software may substitute the missing font with a generic placeholder. Some PDF libraries or printer drivers label these placeholders generically as F1, F2, F3, etc.

sudo apt install fonts-source-han-sans fonts-source-han-serif

Then edit /etc/fonts/local.conf to alias F1 to Source Han Sans.

On Ubuntu/Debian:

sudo apt install ghostscript fonts-noto-cjk

On Windows (using GSview or command line):

Example Ghostscript fontmap entry:

/CIDFont+F1 /NotoSansCJK-Regular ;
/CIDFont+F2 /NotoSerifCJK-Regular ;

This effectively gives you cidfont f1 f2 f3 f4 gratis across any platform.

Many commercial RIPs (Raster Image Processors) include these fonts by default. However, open-source tools like Ghostscript do not ship with proprietary CIDFonts pre-installed due to licensing. This leads users to search for free (gratis) versions to complete missing font errors like: cidfont f1 f2 f3 f4 gratis

Can't find CIDFont "F1"
Unrecoverable error: rangecheck in .getfont

Ghostscript is a free PostScript/PDF interpreter. It includes the Base 35 PostScript fonts (free variants of Helvetica, Times, Courier, etc.), which often stop CIDFont substitution.