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Convert PPT to PPTX Online Free

An old deck on a new screen: black bars, or a proper widescreen fit.

Most .ppt files were made for 4:3 projectors. Converting the format to .pptx is simple. The real question is what to do with the shape, because today's screens and laptops are 16:9. Pick an approach and see a slide both ways.

slide 3 of 24 · on a 16:9 screenWiden the canvas

Quarterly resultsnew room

The chart keeps its shape and the layout spreads out. We move objects proportionally; very busy slides may need a nudge.

Keep 4:3black barsThe slides look exactly as designed, with black bars either side. Safest when layouts are dense.

Stretch to 16:9distortedEverything is widened by a third. Circles become ovals and text looks squat. Almost never right.

Widen the canvasrecommendedThe slide becomes 16:9 and content is re-spaced. Text and pictures keep their shape; the extra width becomes margin or room for a side element.

slideshowConvert to PPTX · widen the canvas

co_presentThe slide engine failed to load: Failed to fetch dynamically imported module: http://127.0.0.1:9777/js/main/general/pres-engine.js.pptx, identified by its bytesfolder_openOpen anotherslideshowSample

Loading the sample deck…

speaker_notes

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convert to

PDFshare, printPPTXeditODPLibreOfficePNGslide imagesPDF + notesspeaker copyMarkdownoutline

searchAll 17 formats · 13 saved hereexpand_more

No format matches.

One page per slide at the deck’s own size, text kept as real text.swap_horizConvert 0 slidesdownload

What survives as PDF · slidescounted in the slide XML, then read back out of the written file

partin deckresulthow

slideshowSlides--

text_fieldsWords on slides--

font_downloadFonts--

imagePictures--

tableTables--

insert_chartCharts · SmartArt--

speaker_notesSpeaker notes--

linkLinks--

animationAnimations · transitions--

movieVideo · audio--

~/the-broken-video

Old decks often point to videos that aren't inside them.

PowerPoint 2003 usually linked to a separate video file on the presenter's computer. Move the deck and the video becomes a grey box. A .pptx can carry the video inside it; we tell you which clips are linked so you can add them.

movieProduct demo videolinked · C:\Presentations\demo.wmvmissing

volume_upIntro musicembedded · 1.2 MB WAVkept

movieCustomer interviewlinked · \\server\media\interview.mpgmissing

imagePhotos on 9 slidesembedded · JPEGkept

~/early-2000s-style

What happens to the WordArt and the checkerboard wipe.

Every old effect still plays in modern PowerPoint. A few now look dated, and there's usually a cleaner modern equivalent one click away.

text_fieldsWordArtRainbow and 3D-extruded text from the 2003 gallery.after convertingConverted to modern WordArt; you can switch it to a plain style in one click.

blur_linearOld transitionsCheckerboard, blinds and random bars.after convertingStill play. The Morph and Fade transitions usually look better.

gradientClip-art backgroundsBitmap textures and early gradients.after convertingKept as pictures; replace with a theme background to reduce file size.

music_noteSound on clickCamera and applause sounds on bullets.after convertingKept. Most presenters now remove them from the Animation pane.

~/other-routes

Frequently Asked Questions

Is converting ppt to pptx free?

Yes, ppt to pptx conversion is completely free with no signup, no watermark, and no usage limit. Convert as many files as you need.

Are my files uploaded to a server?

Your ppt to pptx file is sent over an encrypted connection to our servers, converted, and returned to you. Files are processed only to perform the conversion and are not stored or retained afterward, so they are removed automatically once your download is ready.

How long does ppt to pptx conversion take?

Most ppt to pptx conversions finish in under a minute. Larger files take proportionally longer, but everything happens locally so there is no sign-up wait.

Will the conversion reduce file quality?

That comes down to the formats at each end. A lossless conversion changes nothing you can measure. A lossy one shaves the file down and takes a small amount of quality with it.

Does this work on mobile devices?

Yes. The ppt to pptx converter works on phones, tablets, and desktops in any modern browser including Chrome, Safari, Firefox, and Edge.