"CIDFont+F1," "F2," "F3," and so on are not actual font names that you can download; they are temporary placeholders
Other common substitutes: Myriad Pro, Rockwell, or Arial Narrow. How to Fix Missing CID Fonts
Since you cannot download an "F1" font, you need to identify what the original font was. Here is how to do it: Check Document Properties: Open your PDF in Adobe Acrobat Reader. CID font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download
For 95% of users, installing Noto Serif CJK JP and Noto Sans CJK JP will instantly resolve F1 through F6 errors. For F7, inspect your PDF’s properties and pick a matching open-source font.
Searching for "CIDFont F1" or "CIDFont F2" to download is not recommended and potentially unsafe "CIDFont+F1," "F2," "F3," and so on are not
The "Export as PDF" Trick: Open the problematic PDF in a viewer (like macOS Preview or a browser), choose Print, and then Save as PDF. This often re-encodes the fonts and makes the file usable.
5. Implementation Workaround For users needing exact CID F1–F7 naming in software (e.g., PDF generation), a workaround is to: For 95% of users, installing Noto Serif CJK
The CID font is a unique and versatile font, suitable for a wide range of design projects. It is a sans-serif font, with clean lines and a modern aesthetic. The font is available in various weights and styles, making it perfect for use in headings, body text, and more.