Fix Windows PDF Invalid Font Printing Error

Fix the Windows PDF Printer Error: Invalid Font When Printing Error

Oct 19, 2026 2 min read 62 views

The "Invalid Font" error when printing a PDF document on Windows is a common issue that prevents the printer from processing the document. The error occurs because the printer cannot recognize or render one or more fonts used in the PDF file. This can happen with any printer â€” HP, Brother, Canon, Epson, or even the Microsoft Print to PDF virtual printer.

Here are the most effective solutions to fix this error.

Why Does the Invalid Font Error Occur?

Corrupt or incomplete font files: The fonts used in the PDF may be damaged or not fully embedded in the document
Outdated printer driver: An old driver may not support newer font rendering methods used in modern PDFs
Incorrect printer settings: Wrong advanced printing settings can cause the printer to misinterpret fonts
PDF file corruption: The PDF itself may have errors in its font table

Solution 1: Update the Printer Driver

An outdated printer driver is one of the most common causes of font-related printing errors:

Open Device Manager from the Start menu
Find your printer under Print queues
Right-click and select Update Driver
Choose Search automatically for drivers
If Windows finds an update, install it and restart your computer
Try printing the PDF again

Solution 2: Print as Image

The quickest workaround is to print the PDF as an image which bypasses all font processing:

Open the PDF in Adobe Acrobat Reader
Go to File then Print
Click Advanced
Check the box Print As Image
Click OK and then Print

This method rasterizes the entire document into an image before sending it to the printer, eliminating any font compatibility issues. The print quality may be slightly lower but it avoids the error completely.

Solution 3: Reinstall Problem Fonts

If a specific font is corrupt on your system:

Open Control Panel and go to Fonts
Find the font causing the error â€” the error message sometimes names the specific font
Right-click the font and select Delete
Download a fresh copy of the font from a reliable source
Right-click the downloaded font file and select Install
Try printing again

Solution 4: Check Printer Settings

Go to Devices and Printers in Control Panel
Right-click your printer and select Printer Properties
Go to the Advanced tab
Make sure Print Processor is set to the correct one for your printer
Under Document Defaults, check that the TrueType Font setting is set to Download as Softfont not Substitute with Device Font

Solution 5: Flatten the PDF

If the PDF has form fields, annotations, or layers, flattening it can resolve font issues. Open the PDF in Adobe Acrobat, go to File then Print, select Adobe PDF as the printer, and print to create a new flattened copy. Then print this new PDF on your physical printer.

PDF Invalid Font Printing Error FAQ

Q1. Can the Invalid Font error happen with any PDF viewer or only Adobe Acrobat? Ans: The Invalid Font error can occur with any PDF viewer including Adobe Acrobat Reader, Foxit Reader, Chrome built-in PDF viewer, and Microsoft Edge. However, the error is most commonly reported with Adobe Acrobat and the Microsoft Print to PDF printer. If you get the error in one viewer, try opening and printing the PDF from a different viewer as a workaround. Chrome PDF viewer and Foxit Reader sometimes handle problematic fonts better than Adobe Acrobat.

Q2. Will embedding fonts in the PDF prevent the Invalid Font error? Ans: Yes, embedding all fonts in the PDF is the best way to prevent the Invalid Font error for recipients of your documents. When you create a PDF, make sure all fonts are fully embedded rather than subset embedded. In Microsoft Word, go to File then Options then Save and check Embed fonts in the file with the option Do not embed common system fonts unchecked. In Adobe Acrobat, use the Preflight tool to check and embed missing fonts. Fully embedded fonts travel with the PDF and do not depend on the recipient computer having the same fonts installed.