The Word to PDF tool converts DOC and DOCX files with a headless LibreOffice soffice process using the writer_pdf_Export filter rather than Word's own renderer.
Microsoft's support forum notes that PDF export substitutes an available typeface when the document's original font is missing or not embedded, and that the substitute's different character widths can shift line breaks. Fonts changing when saving as a pdf. - Microsoft Q&A
Word To PDFWord To PDF Fonts Formatting Changed
Upload the DOC or DOCX file to the Word To PDF form.
Select the conversion option to start the process.
Download the finished PDF from the results screen and check whether any pages shifted.
Checking Font Fidelity in the Output
Open the downloaded PDF and select a word to check for a text layer.
Compare the line breaks in the PDF against the original Word document.
Review the character spacing in the converted file.
Continue with DOC vs DOCX size limits or Headers, footers, and page breaks.
Frequently Asked Questions about Word to PDF Fonts Formatting Changed
How do I start the conversion?
Upload the Word document using the link below.
Where do I find the finished file?
Download the PDF from the results screen.
How do I check if the fonts changed?
Select a word in the PDF to verify the text layer.
What should I do if the spacing looks wrong?
Compare the line breaks in the PDF against the original document.