Since CID fonts are proprietary in many cases, here are where you can obtain similar or original CID-keyed fonts for personal or development use.
CIDFont F1, F2, F3, F4, F5, F6, and F7 are not actual font names you can download; rather, they are internal generic labels cid font f1 f2 f3 f4 f5 f6 f7 fonts free download link
If you installed the fonts but the PDF still shows F1 , F2 , etc., the PDF has turned off, or it's looking for a system-specific font ID. Your best fix: Since CID fonts are proprietary in many cases,
⚠️ Be extremely careful with sites offering "CID font F1 free download" as a direct file. Most are fake, repackaged, or contain malware. Always use official sources. Most are fake, repackaged, or contain malware
. Use the "Find Font" or "Replace Font" tool to swap the missing CIDFont+F# with standard system fonts like Times New Roman Export as a New PDF : On macOS, opening the file in and using the Export as PDF
"F1" is a label, not a font name. Identify the actual font name using the "Document Properties" method above, and then download that specific font from a trusted source like Google Fonts or the original software provider.
Download and install the free pack to enable support for those character sets. 3. Ask the Creator to "Embed" the Fonts