How to reduce the size of a PPTX file?

If you cannot upload a PowerPoint file because its size exceeds the upload limit, you can follow the instruction below to reduce the file size.

Here are three things you can do:

• Compress pictures in your presentation;
• Delete image editing data and lower default resolution;
• Reduce the character set of embedded fonts.

Compress pictures in your presentation

1. Select a picture in your document. The Picture Format will tab appear.
2. On the Picture Format tab, under the Adjust group, select Compress Pictures.
3. Under Compression options:
   • Make sure that Apply only to this picture is not selected.
   • Select Delete cropped areas of pictures.
   • Under Resolution, Select Use default resolution.
4. Click Ok.

Delete image editing data and lower default resolution

1. Go to File > Options > Advanced.
2. Under Image Size and Quality:
   • Select Discard editing data.
   • Make sure that Do not compress images in file is not selected.
   • In Default resolution, select 150ppi or a lower value.

Reduce the character set of embedded fonts

1. Go to File > Options > Save.
2. Under Preserve fidelity when sharing this presentation:
   • Select Embed fonts in the file.
   • Then select  Embed only the characters used in the presentation.

   ⚠️ If you want others to edit the presentation, select  Embed all characters.