Reduce file size of pptx files using PHP

Question

I am generating PPTX file using this plugin. Each ppt have near about 20 or more images with approx 600-1000 kb of sizes. I am reducing images via PHP and then add them to PPTX.

However I am getting PPTX file size 16/17 MB same as of image total. Is there any way to reduce file size?

I am redusing size using https://www.wecompress.com/ and I get file with 2/3 MB.

Is there any way in PHP to do so?

Answer 1

https://www.wecompress.com runs on the NXPowerLite file optimization engine (the newest version of), you can see what it's doing in detail here: https://www.neuxpower.com/office-compression/

There's quite a bit going on in there but the biggest gains come from resizing and compression.