Printing a PDF to PDF sounds redundant, but it's a common workaround for specific problems — stripping permissions, flattening annotations, reducing file size, or working around a compatibility issue. What actually happens under the hood explains both why it sometimes works and why it sometimes makes things worse.
What the Process Actually Does
When you print a PDF to a PDF printer (Microsoft Print to PDF, Adobe PDF, or a similar virtual printer), the application renders each page as it would appear on a physical printer and hands that rendered output to the virtual printer driver, which packages it into a new PDF file. The result is a fresh PDF built from the rendered output — not a copy of the original.
This is fundamentally different from saving or exporting a PDF. Saving preserves the original structure. Printing to PDF creates a new document from the visual rendering, which means the output may differ from the input in significant ways.
What Gets Lost in the Process
Interactive elements don't survive print-to-PDF. Form fields that were fillable become static text or disappear entirely. Hyperlinks become unclickable text. Bookmarks and navigation structure are gone. Digital signatures are removed. Annotations may or may not be included depending on whether "Print annotations" was enabled in the print dialog.
The text layer may also change. If the virtual printer driver rasterizes the output — converting everything to an image rather than preserving text as characters — the resulting PDF is image-only. Text selection, copying, and searching stop working. This happens more often with some drivers and applications than others, and it's the main reason print-to-PDF is a poor substitute for a proper PDF export.
What Print-to-PDF Is Actually Useful For
Despite its limitations, print-to-PDF solves specific problems well. The most common legitimate use: stripping permissions and edit restrictions from a PDF you own. A PDF with copy and print restrictions can often be unlocked by printing to PDF — the resulting file has no restrictions because it's a new file the virtual printer created, not a copy of the locked original. This only applies to content you have the right to access.
Print-to-PDF also flattens annotations, making them part of the page content rather than a separate layer. If you've annotated a PDF and want to share a version where annotations can't be easily removed or toggled off, printing to PDF merges them into the page permanently.
For PDFs that refuse to open correctly in one viewer but display fine in another, printing to PDF from the working viewer creates a new file that may open more universally — the problematic elements in the original structure get replaced with a cleaner rendered version.
File Size After Print-to-PDF
Print-to-PDF can make files larger or smaller depending on the driver and the content. A vector-heavy PDF printed to PDF through a driver that rasterizes output can balloon in size — vector graphics that were compact mathematical descriptions become large raster images. Conversely, a PDF with accumulated edit history and redundant data sometimes comes out smaller after print-to-PDF because the rendering process discards all the hidden overhead.
For reliable file size reduction, a PDF Compression tool is more predictable than print-to-PDF. Compression preserves the file structure and text layer while targeting size; print-to-PDF rebuilds from scratch with unpredictable results.
When to Use It vs. When to Export Instead
Use print-to-PDF when you specifically need flattening, permission stripping, or a fresh file that bypasses structural problems in the original. Use a proper export for everything else — creating a PDF from a Word document, reducing file size, converting content for sharing. The export path preserves text layers, interactive elements, and document structure that print-to-PDF strips away.