Question 1

How do I compress a PowerPoint file without losing quality?

Accepted Answer

Compress the images rather than the slides. Most of a large .pptx is photographs and screenshots, so leaving the slide structure alone and re-encoding only the images reduces size dramatically without touching text, fonts or layout. DeckSlimmer does this automatically and keeps the deck editable.

Question 2

Will compressing my PPTX make it uneditable?

Accepted Answer

It does not have to, but many tools do exactly that: they render each slide to an image, which destroys editability. DeckSlimmer's default mode keeps slides as real slides, so text stays selectable and correctable and fonts remain embedded.

Question 3

How do I make a PowerPoint small enough to email?

Accepted Answer

Typical email limits are 25 MB for Gmail and Outlook, and stricter on many corporate systems. Compressing the deck's images usually brings a file well under that while keeping it editable. Choose a target size in DeckSlimmer and it works down towards it.

Question 4

Is DeckSlimmer free, and are my files kept?

Accepted Answer

Yes, it is free and needs no account. Uploaded files and their results are deleted after 24 hours.

Question 5

What is the difference between editable and picture-slide compression?

Accepted Answer

Edit-ready mode keeps slides as slides so the deck can still be edited. Picture-slide mode flattens slides to images, which produces a smaller file but a deck that can no longer be edited. Edit-ready is the default.