Embedding non-embedded fonts

[sfadschm]

Hi,
I currently have a pdf file which has some embedded and some non-embedded fonts.
What I want to achieve is switching the non-embedded fonts to embedded without changing anything else in the file.

So far, I could not find any means to do that.
I found

• re-generate the PDF only with standard non-embedded fonts PyMuPDF#73, which might hint, that such action is not possible at all at current time.
• https://github.com/pymupdf/PyMuPDF-Utilities/tree/master/font-replacement, which I believe might do the trick if I replace all non-embedded fonts with themselves, but has a high risk of breaking some layout due to rewriting the whole text of replaced fonts.

Is there any low-threshold method to just tell pdf to embed the font?

Side-note: E.g., in "Foxit PDF Editor", the only way to do so is to "print" the whole document with the internal printer again, checking the "embed all fonts" checkbox.

Thanks in advance!

[JorjMcKie]

No, and I believe this cannot ever work without actually rewriting the text.
Non-embedded fonts are "simple" fonts, where Unicodes are <= 255 and glyph number = Unicode number.
The embeddable Helvetica version works entirely different here compared to its Base-14 pendant.

[sfadschm]

Alright, thanks for the elaboration!