| Old Alias | Recommended Replacement (OpenType) | |-----------|-------------------------------------| | CIDFontF1 | NotoSansCJK-Regular.ttc | | CIDFontF2 | NotoSerifCJK-Regular.ttc | | CIDFontF3 | NotoSansMonoCJK-Regular.ttc | | CIDFontF4 | NotoSansCJK-Bold.ttc | | CIDFontF5 | NotoSerifCJK-Bold.ttc | | CIDFontF6 | NotoSansCJK-Symbols.ttc |
PDFs generated using older versions of Distiller or converters that do not comply with modern font-embedding standards. Updated Solutions and Fixes for CIDFont+F1–F6 (2026)
A is not a commercially downloadable retail typeface that you can install on your computer. Instead, names like CIDFont+F1 are generic internal placeholders generated automatically by PDF creation software (such as print drivers, CAD tools, or scanners) when a source font is subsetted and embedded into a file. cidfontf1 f2 f3 f4 f5 f6 updated
Open the document properties or form field properties within your PDF editor.
: Several free online PDF validation tools can list all fonts embedded in a file. | Old Alias | Recommended Replacement (OpenType) |
The PDF industry is slowly moving toward pure OpenType collections, but CIDFonts remain deeply embedded in billions of existing documents. The cidfontf1 – f6 pattern will continue to appear in archived documents, legal PDFs, and scanned OCR output.
Method 3: Flatten the PDF to Outlines (For Printing & Archiving) Open the document properties or form field properties
Here are the key updates as of recent years:
: Right-click the PDF and open it in a web browser like Microsoft Edge or Google Chrome. Click the Print icon, change the printer destination to Microsoft Print to PDF , and save it as a new file. 2. Manually Map Missing Fonts in Desktop Editors
Here is an updated guide to understanding and fixing these pesky font errors. What are CIDFont+F1 through F6?