Reduce the size of a PowerPoint file

This page continues on from Record a PowerPoint presentation with audio

Check the size of your file

Click File and select the Info option in the left hand side bar.

screenshot of powerpoint showing location of file tab

Look at the Properties section on the right for detailed information about your file.

screenshot of powerpoint showing location of file size

If you’re submitting your file for an assignment, we recommend aiming for a file size of 20MB or less. Larger files can take a long time to upload, and things can go wrong if you experience network problems during the upload.

How to reduce the size of your file

There are two things you can do within PowerPoint to reduce the size of your file. Neither of them are guaranteed to work, but they are both worth trying.

1. Compress images

Click on an image in your presentation.

This will activate the Picture Tools / Format tab:

screenshot of powerpoint showing location of picture tools format tab

Click Compress Pictures.

screenshot of powerpoint showing location of compress pictures button

Uncheck Apply only to this picture and select Email (96ppi) as the target output.

screenshot of powerpoint showing items to select from compress pictures dialog: apply only to this picture, and email (96 ppi)

Click OK and save the file.

2. Compress media

If your presentation has audio or video embedded in it, you might be able to reduce the file size through the following steps.

Click File and select the Info option in the left hand side bar.

screenshot of powerpoint showing location of file tab

Choose Compress Media and select HD (720p). If your file is especially large, you might want to choose Standard (480p).

  • In older versions the equivalent setting is Internet Quality.
screenshot of powerpoint showing location of compress media option

In new versions of PowerPoint you can also Optimize Compatibility which may help reduce issues when presenting on different machines.

Further help

If you require further assistance with reducing the size of a PowerPoint file, please contact the E-learning Developer for your course.