Word to PDFWhy Your Images Are Blurry After Converting Word to PDF
Word compresses the pictures in your document to 220 ppi every time you save, before any PDF exists. By the time you run an export, the extra detail is already gone, and no converter can put it back. The fix is a checkbox in File > Options > Advanced, and it only helps if you set it before the pictures go in.
The compression happens when you save, not when you export
Microsoft 365's default picture resolution is 220 ppi. Every time you save a .docx, Word resamples any inserted picture that exceeds that, permanently, inside the file. The PDF exporter never sees the original pixels — it only sees what survived the last save.
That is why the usual troubleshooting fails. People try a different export route, then a different converter, then a different computer, and get the same soft image every time, because all of those tools are reading the same already-downsampled bytes out of the same document.
One related setting is worth knowing about: Discard editing data, in the same options panel. Word normally keeps a copy of the original image data so that Picture Format > Reset Picture can undo your crops and adjustments. Discard editing data throws that copy away to save space. If it has not been ticked, Reset Picture is worth trying before you assume the detail is lost.
Turn compression off before the pictures go in
In Word for Windows, go to File > Options > Advanced and scroll to Image Size and Quality. Three things there matter:
- The dropdown at the top of the section decides what the settings apply to. It defaults to the document you currently have open. Word — unlike Excel and PowerPoint — also offers All New Documents, which is what you want if this should stick.
- Tick Do not compress images in file.
- Set Default resolution to High fidelity. The same list offers fixed values of 330, 220, 150 and 96 ppi, with 220 as the shipped default.
Order matters more than the settings do. Turning compression off does not restore pictures that a previous save already resampled. Delete those and insert them again, or select each one and use Picture Format > Change Picture > This Device, which swaps in the original file while keeping the size and position you already set.
Expect the .docx to get considerably larger. That is the trade, and it is the whole reason Word compresses by default.
Microsoft documents this panel for Windows only. On Mac, the equivalent controls live in the Compress Pictures dialog on the Picture Format tab, which is also where the "Delete cropped areas of pictures" checkbox sits.
The export dialog has a second quality switch
Even with compression off in the document, the export itself can downsample again. Go to File > Save a Copy (or Save As), choose PDF in the file type list, then click More options… to open the full Save As dialog. Beneath the file name you will find Optimize for with two radio buttons:
- Standard (publishing online and printing) — leaves image quality alone.
- Minimum size (publishing online) — reduces it to shrink the PDF.
Standard is the default, but the choice is remembered per export and it is easy to have flipped it once for an email attachment and forgotten. If a document you sent last month looked fine and this month's looks soft, check this before anything else.
Pasted screenshots are usually the real cause
If the blurry item is a screenshot, a diagram copied out of a browser, or anything else that arrived via Ctrl+V, the compression settings above are probably not your problem. A clipboard bitmap carries no resolution information, so Word places it at a nominal 96 ppi — the resolution Windows assumes for the screen. A screenshot pasted at anything near full page width therefore lands with roughly 96 ppi of real detail in it: below what looks clean on a screen, and less than a third of what print needs.
You can check this in ten seconds. Click the picture, open the Picture Format tab and read the width in inches under Size. Divide the screenshot's pixel width by that number. That figure is the resolution the PDF will get, regardless of what any export setting says.
There are two fixes, and they work together. Capture more pixels in the first place — zoom the source to 200% before taking the shot, or capture on a HiDPI display, which doubles the pixel count for free. Then save the capture as a file and bring it in through Insert > Pictures > This Device rather than pasting it.
What resolution you actually need, and how to work it out
Two numbers cover almost everything: 150 ppi for a document that will be read on a screen, 300 ppi for anything that will be printed properly. Below 150, edges soften on a normal display. Below about 200, print starts to look obviously fuzzy.
The arithmetic is one division: pixel width ÷ printed width in inches = ppi. A 1500-pixel-wide photo placed 5 inches wide is 300 ppi. The same photo stretched to 10 inches is 150 ppi. Nothing about the file changed — only how far you spread it.
A useful benchmark: the text column on US Letter with 1-inch margins is 6.5 inches wide. To fill it at 300 ppi you need an image at least 1,950 pixels across; at 150 ppi, 975 pixels. If your source file is 800 pixels wide, no setting in Word and no converter anywhere will make it print sharply. You need a bigger original.
What our converter does with the images
The converter on this site reads the .docx in your browser and copies each embedded JPG and PNG into the PDF byte for byte. It does not re-encode them, does not downsample them, and has no quality setting of its own. It cannot add blur — and by exactly the same logic, it cannot remove blur that Word already baked into the file.
That makes it a decent diagnostic. Convert the same .docx here and with Word's own export. If both PDFs are soft in the same places, the pictures inside the document are already low-resolution, and the fix is upstream: re-insert the originals with compression turned off, then export again.
Worth knowing before you lean on it: it reads .docx only, it typesets text in DejaVu Sans rather than your document's own typeface (see why fonts change), and it does not render charts, SmartArt, shapes or text boxes at all. For a document built around those, Word's own Export is the right tool.
How to check the real resolution inside a finished PDF
Without installing anything, open the PDF and zoom. Viewers render a PDF page at 72 ppi at 100% zoom, so the zoom level at which an image just begins to break up tells you roughly what is inside it: 72 × zoom% ÷ 100. Still crisp at 200% means about 144 ppi. Still crisp at 400% means about 288 ppi. On a HiDPI or Retina display, double both figures.
For an exact answer, pdfimages from the Poppler toolkit lists every image in a PDF along with its dimensions and resolution:
pdfimages -list document.pdf
The x-ppi and y-ppi columns give the effective resolution of each image as placed on the page — the number that decides how it prints. Poppler installs with brew install poppler on macOS, is in the standard repositories on Linux, and has Windows builds available.