I did my powerpoint presentation in Mac, when opened in windows it gets pixelated? How to fix?

Question

I did my powerpoint presentation in Mac, when opened in windows it gets pixelated? How to fix?

Ubrand Branding 0

I did my powerpoint presentation in Macbook, but when I open it in Windows all the images included gets pixelated. Although all the images are save in high resolution and compression is off also the logo placed in the file is SVG yet they get pixelated when opened in Windows.

How can I fix this problem to ensure the presentation is not pixelated and as clear as it is on the macbook.

I have already tried ALL THE STEPS MICROSOFT TOLD ME. Everyhting is done right but still pixelated.

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4 answers

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Answer 1

Filip Haegdorens 20

I had the same problem and found the cause.

When you paste part of a PDF into PowerPoint for Mac, the file stores two versions: the original PDF (which the Mac shows) and a small backup bitmap of a few hundred pixels wide (which Windows shows, because it can't read the PDF). That backup is what looks pixelated.

The sharp PDF is still inside the file. I made a free, open-source Mac app that turns it into a 300 ppi image Windows can show, and saves a copy as "name_windows.pptx". Your original is not changed. Drag and drop, or let it watch a folder.

https://github.com/Filhgd/pptx-mactowindows-fix

Disclosure: I'm the developer. It only fixes content pasted from a PDF, not screenshots that were already low resolution.

John Korchok 236.4K Reputation points Volunteer Moderator

2026-09-30T22:08:47.07+00:00

Sorry, some of your information is incorrect. Placed PDFs are not saved internally as PDFs. You can verify this by unzipping the file and looking in the ppt/media folder, where all placed images are stored. (This isn't always easy in macOS, because the GUI Archive utility can't unzip Office file correctly. See my article at OOXML Hacking: Editing in macOS). You will not find a PDF file there. Instead, it will be converted into a vector EMF or a bitmap PNG. It's the PNG that causes the blurriness.
Filip Haegdorens 20 Reputation points

2026-10-01T07:11:47.9633333+00:00
Thanks John, you're right that there's no separate .pdf file in ppt/media. What I found is that the PDF is stored inside the EMF.

I unzipped a deck where this happens. The pasted clips are .emf files in ppt/media, but those EMFs contain no vector drawing at all. Each one holds:

An EMR_COMMENT_MULTIFORMATS record (the "GDIC" comment from the MS-EMF spec) with the complete original PDF. PowerPoint for Mac draws this, which is why it looks sharp there.

An EMF+ bitmap of only 400 x 270 pixels. Windows can't use the PDF part, so it draws this bitmap, stretched to an 8-inch-wide picture on the slide (about 50 ppi).

Anyone can check this: open the EMF from ppt/media in a hex editor and search for "%PDF".

So the sharp original is still in the file. The app renders that embedded PDF at 300 ppi and swaps it in for the EMF in a copy of the deck.

Answer 2

There could be a couple of things going on here.

SVG graphics only arrived in Office 2013. For backwards compatibility, placing an SVG also creates a low-res PNG file of the graphic. If the Windows user is still on Office 2007 or 2010, they will see the PNG file instead of the SVG.

If you are placing PDF files on a Mac, that is not a valid picture format in Windows. A Windows user will often see a pixelated version of your graphic.

For better compatibility, use the open source program InkScape to convert vector PDFs and SVG to EMF format. EMF was invented by Microsoft and displays well in all Office programs, even old versions.

For bitmap PDFs, use JPG or PNG format instead of PDF.

Answer 3

Jeronimo Fuerte 46,725 Independent Advisor

Hi! Sorry to hear you’re dealing with this. If you’ve already tried several troubleshooting steps, the best next step would be for you to share one of the affected files here so we can test it and confirm whether the issue is file-specific or environment-related. If the file contains sensitive information, please upload a copy with any confidential data removed.

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Answer 4

Ubrand Branding 0

All the steps you suggested has already been plus. Everything is right but it is still pixelated and now working.

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