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Compress PPT and Reduce PowerPoint File Size

Make a photo-heavy deck small enough to email, upload to a course portal or share in a chat, still opening normally with every picture in place.

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or drop files here

Accepts PPTX

Encrypted upload. Files are deleted automatically after 1 hour.

About Compress PowerPoint

Compress PPT decks that grew huge because of photos: a product launch with full-resolution shots, a wedding slideshow, a lecture with a screenshot on every slide. Photos pasted in from the clipboard are stored as PNG, often the whole reason a deck is huge, and photos from a camera or phone keep their full resolution even when they fill only a corner of a slide. In our test, a slide with a pasted photo shown 3 inches wide went from 16.5 MB to 40 KB and still opened normally. Reports and other Word files bloated by photos go through Compress Word instead.

Each picture is sized for how large it's shown on the slides that use it, cropping included, at about 300, 200 or 144 pixels per inch for Light, Recommended and Extreme, so a photo filling a slide keeps what the slide needs and a small logo loses the pixels nobody sees. Photos pasted in as PNG are saved as JPEG with the same look, and the deck's links follow them; screenshots, charts and pictures with see-through parts stay PNG. Text, animations, transitions, notes and layouts aren't touched. Embedded video, sound and fonts are left as they are, and when a deck is mostly video, the result says how many MB that is. Target size keeps the deck under a size you choose, like an e-mail limit: the gentlest level that gets there is used, or you get the smallest version with a note. Target size is a VIP feature, and free accounts can try it once a day.

How to use Compress PowerPoint

  1. 1
    Upload the deck

    Click Choose file or drop a PPTX. Free accounts can upload decks up to 50 MB, VIP up to 1 GB.

  2. 2
    Pick a level

    Recommended keeps photos sharp on a projector, Extreme is for tight email limits and Light changes the least. Target size aims for the size you set.

  3. 3
    Click Compress PowerPoint

    Pictures are resized and recompressed in an isolated process on our server.

  4. 4
    Save the lighter deck

    See the percentage saved, then save the deck under its original name.

Why use Cubfile for this

  • Sized for the slide

    Each photo keeps the pixels its size on the slide needs, cropping counted, instead of one fixed size for all.

  • Pasted photos made JPEG

    PNG photos from copy and paste become JPEG, far smaller and looking the same, and the deck still opens normally.

  • Slides unchanged

    Text, fonts, animations, transitions and speaker notes stay exactly as they were.

  • Before and after

    The result page shows the old and new file size and the percentage saved, and for a deck that's mostly video, how many MB that is.

FAQ

Compress PowerPoint: questions and answers

How much smaller will Compress PowerPoint make my deck?
That depends on the pictures. Decks full of camera photos, or of photos pasted in as PNG, often shrink a lot, because each picture only keeps the pixels its place on the slide needs. Decks made mostly of text, charts or video change little.
Does it compress videos in the presentation?
No. Embedded video and audio clips are kept as they are, and when they make up most of the deck, the result says how many MB they take. To make a video-heavy deck smaller, compress the clips before inserting them, or link to them online.
Will slides look worse after I compress PowerPoint files?
Not on Recommended, which keeps about 200 pixels per inch of the size each picture fills on the slide, enough to look sharp on a screen or projector. Extreme can soften fine detail, so keep it for email limits. On a device without PowerPoint, Office Viewer lets you look through the compressed deck in the browser.
Is Compress PowerPoint free?
Yes. Visitors get 2 tasks in total and free accounts 2 a day, for decks up to 50 MB. VIP has no daily limit, takes decks up to 1 GB and unlocks Target size, which free accounts can try once a day.
Is my deck deleted after compression?
Yes. The original and the compressed copy are deleted automatically after one hour. The upload is encrypted and each job runs in an isolated process.
Share Compress PowerPoint with a friendIt runs in any browser, and they can try it without signing up.

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