Check the box and save the new PDF. This ensures the viewer's computer does not need to have the fonts installed locally. 4. Convert the PDF to Curves/Outlines

CID fonts are meant to be embedded directly inside the PDF file when it is created. Downloading a random font pack will rarely fix a broken PDF because the specific encoding mapped to "F1" or "F2" in your file is unique to that document.

This turns the text into raw vector shapes. It makes the file size larger and the text uneditable, but it completely eliminates any future font errors.

Open the PDF in a vector editing program like Adobe Illustrator or a specialized pre-press PDF tool. Convert the text to "Outlines" or "Curves."

Sites offering "repacks" of fonts or software often bundle malicious software, adware, or trojans inside the download.

Download and install the pack corresponding to your operating system. This adds the necessary CJK character sets to your reader. 2. Use a Different PDF Reader

Both have highly advanced built-in PDF engines that can often bypass or substitute missing CID fonts automatically.

These are not the actual names of the fonts. When a PDF is created by software like AutoCAD, Adobe InDesign, or Microsoft Word, the program often assigns generic aliases (like F1, F2, F3) to the fonts used in the document to keep the file size small.

Look for an option that says or "Download All Fonts" .