If you are seeing these errors in a document, you can usually resolve them by substituting the placeholders with standard fonts: CID+ Fonts - Adobe Community
This article explains what CID fonts actually are, why you cannot download a single font called "F1" or "F2," and how to safely resolve these PDF rendering issues. What Are CID Fonts (F1, F2, F3, F4)?
: Many sites claiming to offer these "fonts" for download are flagged by virus scanners as unsafe. Non-Existent Files Cid Font F1 F2 F3 F4 Free Download
assigned by PDF-exporting software (like Microsoft Word, online converters, or older PDF engines) when they fail to properly embed or name the original font. What they represent: They are often local system fonts like Times New Roman that have been renamed by the PDF producer. The "F" numbering: Software typically uses , etc., to denote different weights or styles (e.g., for Regular) within the same document. CID Technology: CID stands for Character Identifier
This is a legitimate, stand-alone font file that you can install and use for personal projects, also created by a designer or a fan. This confusion is why so many users are searching for a "CID Font F1" download. If you are seeing these errors in a
Fix 1: Regenerate the PDF (If You Own the Original Source File)
on macOS) and use "Export as PDF." This often flattens the font data into a more readable format. Embed Missing Fonts : If you have Adobe Acrobat Pro , you can use the Preflight Tool CID Technology: CID stands for Character Identifier This
The labels are internal placeholders or "shorthand" names generated by software (like InDesign, Illustrator, or Acrobat Distiller) during the PDF export process.
Since there is no "official" download for these names, you have to use workarounds to view or edit your files: Impossible fonts to be found / Fontes impossíveis de achar
