import fitz # PyMuPDF
noto_path = "/path/to/NotoSerifCJKjp-Regular.otf"
for page in doc:
for block in page.get_text("dict")["blocks"]:
for line in block["lines"]:
for span in line["spans"]:
if span["font"] in ["F1", "F2", "F3", "F4", "F5"]:
# Insert replacement font
page.insert_font(fontfile=noto_path, fontname="F1_Replacement") CID font F1 F2 F3 F4 F5 F6 F7 Fonts Free Download
Always prefer official foundry or repository sources (vendor site, Google Fonts, Adobe Fonts, Font Squirrel, GitHub releases for open fonts).
Check whether the license allows embedding in documents, commercial use, and modification.
CID fonts F1 through F7 represent a set of CID-keyed typefaces used where vast character inventories are required—principally in East Asian typography. Each file typically contains a different style, weight, or subset, enabling publishers to match tone and function across print and digital documents. Because CID fonts efficiently map character identifiers to glyph outlines, they remain essential in professional printing and PDF production. When seeking “free downloads” labeled F1–F7, exercise caution: such generic names often hide licensing restrictions or repackaged proprietary fonts. Safer choices are open-source CJK families (Source Han / Noto CJK), which offer comparable breadth and typographic quality under permissive licenses and can be freely downloaded from official sources. Always prefer official foundry or repository sources (vendor
If you want, I can:
Searching for "CID font F1 F2 F3 F4 F5 F6 F7 fonts free download" often leads to sketchy websites offering infected .exe files or renamed fonts. Be aware: CID fonts F1 through F7 represent a set
Always download from the official sources listed above (Google Fonts, GitHub/adobe-fonts, or Japan IPA).
For professional users: Use a font management tool or edit the PDF’s font dictionary using a tool like cpdf (Coherent PDF) or Enfocus PitStop Pro to permanently replace /F1 with the new font path.