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How to Reduce the Size of a PowerPoint Presentation

How to Reduce the Size of a PowerPoint Presentation | Tutoriels et conseils pour vos présentations

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Sometimes, after creating a presentation, you come to realize that its size is bigger than what you expected and, thus, you need a way to reduce the space it takes up on your drive or storage device. 

In this Slidesgo School tutorial, we are going to give you some hints on how to decrease the size of a PowerPoint file

Reducing the size of the images

  • Open your PowerPoint presentation.
  • Select an image.
  • The Format tab will appear at the top of the screen. Go to that tab and click Compress Pictures.

A dialog box will appear, where you can choose whether to:  

  • Apply the changes only to the selected picture or all of them.
  • Delete all cropped areas (please note that if you choose this option, these areas will be deleted and you will not be able to restore the image to its original state).
  • Under “Resolution”, we recommend that you select “Use default resolution”.
Compressing the pictures

Changing the resolution

  • Open your PowerPoint presentation, go to the File tab and click Options. Then, select the Advanced tab.
  • Under “Image Size and Quality”, check “Discard editing data” and uncheck “Do not compress images in file”.

There’s an option that allows you to set the default resolution (measured in ppi). We recommend that you choose one that suits your presentation mode. 

Advanced options

Lowering the amount of characters from embedded fonts

To minimize even more the size of the file, you should embed only the characters used in the presentation. This, however, will limit some editing capabilities for other users who do not have the same font already installed on their computers. To do this, go to: 

  • File tab > Options > Save.

Under “Preserve fidelity when sharing this presentation”, check the following boxes: 

  • Embed fonts in the file.
  • Embed only the characters used in the presentation.
Embedding the characters

Pro Tip: If you have used fonts that you would like to keep or you think other users will need when editing this presentation, check “Embed all characters” instead of “Embed only the characters used in the presentation”. 

Exporting the presentation as a PDF

If you want to reduce the size of the file even more, you can convert it to PDF. This will generate another file with the same contents, but lighter. It’s a good solution, especially if you need to send the file to other people. 

To do this, go to: 

  • File tab > Save as Adobe PDF.
  • If you do not have Adobe PDF installed, this option will not appear. In that case, go to the File Tab, click Save as and select “PDF” from the “Save as type” drop-down list.
Exporting as a PDF

For more information on how to set up the different options for exporting as a PDF, please refer to our How to Export Your Presentation as a PDF File tutorial. 


All the GIFs for this tutorial show our Cool Birthday Party template. If you like it and you want to use it to organize a nice party, just click on the title and you will be able to download it. 


Note: Regarding the instructions listed on this tutorial, we are assuming you are using the PowerPoint version included within Office 365. If you have a different version, some of the options might change. Please visit Microsoft Support for more information if that is the case. 

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