CID (Character Identifier) fonts are architectural font formats used in PDFs to manage complex character sets. They are common in documents utilizing: East Asian languages (Chinese, Japanese, Korean) Specialized mathematical symbols Custom graphic design typography
If you can open the file but the text looks corrupted or fails to print, you can force your operating system to flatten the fonts.
The story begins with Emilia, a young and aspiring writer who stumbled upon an ancient tome in the depths of Ashwood's library. The tome, bound in a strange material that felt like a mix of leather and wood, was titled "The Art of Chronicling." As Emilia opened the book, she discovered that its pages were filled with intricate descriptions of the CIDFontF1 through F6. cidfontf1 f2 f3 f4 f5 f6 updated
The best fix is to get the original document and re-export it with proper font embedding.
Always dereference F1 – F6 to the actual /BaseFont name. The tome, bound in a strange material that
Impossible fonts to be found / Fontes impossíveis de achar
This diagnostic step is critical, as it confirms which specific placeholders are present in your file. Impossible fonts to be found / Fontes impossíveis
// iText 7 (2025) PdfFont font = PdfFontFactory.createFont("NotoSansCJK-Regular.ttf", PdfEncodings.IDENTITY_H, true);
So F1 = Noto Sans CJK JP Regular.
qpdf --replace-font cidfontf2 --new-font "NotoSansCJK-Regular.ttc" input.pdf output.pdf