Why Microsoft Print to PDF Makes Large Files (and What to Do)

Open the file in Microsoft Edge or any app that can print it, press Ctrl+P, choose Microsoft Print to PDF under Printer and click Print. A Save Print Output As window then asks for a name and a folder. Use a new name, so the original stays as it was.

Under Pages you can pick Custom and type a range to keep only some pages. What you won't find is any setting for image quality or file size. Whether the copy comes out smaller, about the same or larger depends on what is in the document and on the app that prints it.

A virtual printer works like a real one. The app that prints turns each page into drawing instructions for a printer, and instead of putting ink on paper, Windows writes those instructions into a new PDF.

So the result is a new document built from the print output, not a slimmed-down copy of the one you started with. It prints one document per print job, so it can't combine several PDFs, and it has no password option either.

Printing takes a PDF apart and rebuilds it, and nothing on that trip is designed to save space.

• No compression setting. You can't ask the printer for smaller pictures. Apps treat it as a 600 dpi printer, so a program that prepares images for print can send them at that resolution.
• Pages sent as pictures. Some apps, and Edge with Print as image turned on, send every page as one large image. The file balloons, and its text can no longer be searched or selected.
• Compact data unpacked. Pictures the original stored very efficiently can be written back less efficiently, and transparent objects may be flattened into images.

A printed copy keeps what the pages look like, not what the document can do, so keep the original for anything you'll fill in, sign or send with working links.

• Links stop being clickable.
• Bookmarks, the outline readers use to jump between chapters, are gone.
• Form fields can no longer be filled in.
• Searchable text disappears when the app sends pages as images: the words become part of the picture.

If the document started in Office, don't print it at all. Choose File > Export > Create PDF/XPS, then set Optimize for to Minimum size (publishing online). Office writes the PDF itself: it trades some picture quality for a smaller file, text links keep working, and Word's Options can turn your headings into bookmarks.

Pictures are usually what makes an Office file heavy. Before you save, select a picture, open the Picture Format tab and click Compress Pictures. Clear Apply only to this picture to treat them all, choose a lower resolution such as Web (150 ppi) or E-mail (96 ppi), and tick Delete cropped areas of pictures.

Office isn't part of Windows, and none of this helps with a scan or a PDF someone sent you: opening an existing PDF in Word converts it into an editable document, and the layout often shifts.

Printing can't aim, and Office's settings only help with files you made in Office. Upload forms don't ask for “a bit smaller”; they ask for under 2 MB, under 5 MB, under 300 KB.

File Acture takes the number instead: set Compress by to Target size, type the limit, and the app searches resolutions from 300 down to 72 DPI and a range of JPEG qualities until the measured file size fits. Only the images are replaced, so text stays searchable and links, bookmarks and form fields keep working. A file that already fits is left alone.

It also does what the printer won't: dozens of files in one run, grayscale for documents that carry no color, and a clear message when your target is impossible instead of a quietly ruined copy. Nothing is uploaded. See how target size works.

The limits people hit most are an email attachment cap and an upload form. Making a PDF from photos is a different job: here's how to do it well.