What (Windows, Mac, iOS, Android) are you using? What software are you using to open the PDF?
Use Adobe Acrobat Mobile app with cellular data on to fetch fonts. How to Prevent CIDFont Errors When Creating PDFs
To understand the installation issue, one must understand the file type: cidfont f1 f2 f3 f4 f5 f6 install
A new job had arrived that morning: a commission from an independent press to restore a forgotten typeface family known only by an old label in the client’s note: "CIDFONT — install F1 F2 F3 F4 F5 F6." No trademark, no designer, just six enigmatic files passed along on a cracked USB labeled in blocky marker.
The steps to resolve this issue depend on the software you are using. What (Windows, Mac, iOS, Android) are you using
: Stick to standard OpenType or TrueType fonts if your document is intended for a global audience.
If you are using the desktop version of Adobe Acrobat Reader, Adobe does not include Asian language font support in the base installation to keep the download size small. You must install the supplemental font pack. Close Adobe Acrobat Reader completely. How to Prevent CIDFont Errors When Creating PDFs
: Close and reopen Adobe Acrobat or Illustrator. When you reopen the problematic PDF, the software should now be able to locate the fonts, and the CIDFont+F1 errors should be resolved.
When you open this PDF later, your computer cannot find this specific temporary placeholder, leading to "font missing" errors, missing text, or character substitution issues. Why You Cannot "Install" CIDFont F1-F6
Last updated: October 2025 – tested with Ghostscript 10.03, Noto CJK 2.004, and Ubuntu 24.04.