Hello,
you can do this with the PDF24 Toolbox of the PDF24 Creator:
- Open the PDF24 Toolbox and choose "Convert PDF to ...".
- Add your PDF file.
- Set "Format" to "PDF".
- Make sure "Embed fonts" is set to "Yes" (this is the default).
- Click "Convert" and save the result.
The fonts must be installed on your computer. If a font is missing, PDF24 embeds a similar font instead.
If you need all fonts embedded without exception, for example for a print shop or a self-publishing service, choose the format "PDF/A-2" instead. PDF/A requires every font to be embedded, including standard fonts like Helvetica or Times.
If you need the embedded fonts for something else, please let us know what for, then we can help further.
Online, converting a PDF to PDF/A also embeds its fonts: https://tools.pdf24.org/en/pdf-to-pdfa