Convert PPTX to APNG Online

PPTX to APNG Converter

.pptx is the Office Open XML presentation package PowerPoint has defaulted to since 2007; APNG is Animated PNG, a PNG file carrying extra chunks that describe a frame sequence. Putting the two together is an unusual request, and it is worth being exact about what this converter does before you run it: it renders one image per slide and writes each of them as its own .apng file. It does not assemble your deck into a single looping animation. If a loop is what you came for, PPTX to GIF is the route that actually builds one.

What This Conversion Actually Produces

The pipeline is the same one every presentation-to-image target uses: LibreOffice Impress lays the deck out, exports it to an intermediate PDF, and each page of that PDF is rendered to pixels at a fixed 300 DPI. Those renders are then written to the target extension one file at a time. For APNG that means each output is a single-frame PNG-family image with an .apng name — a valid, viewable picture of one slide, with no acTL animation-control chunk and therefore no animation.

Two practical consequences follow:

• A 12-slide deck gives you 12 .apng files, listed separately with a Download All (Zip) button. Not one file with 12 frames.
• Each file behaves exactly like a still PNG anywhere you open it, because that is what it contains.

The option panel on this page also shows a Framerate dropdown and a Combine? choice between "Single animation" and "Individual files". Both are carried over from the image-to-animation route and neither is read on a presentation source, so changing them will not alter your output. Image resolution is likewise not applied on this particular write path. There is nothing to tune here — the render is fixed at 300 DPI, and the slide's own dimensions decide the pixel size.

APNG Format at a Glance

How to Convert PPTX to APNG

1. Upload Your PPTX File: Drag the .pptx onto the page or click Add Files. The deck uploads over an encrypted connection and is converted on our servers.
2. Skip the Output Settings: Framerate, Combine? and Image resolution are all inert on this route, and the render DPI is fixed at 300, so there is nothing worth changing before you convert.
3. Convert the Deck: Click Convert. The deck is laid out, every slide is rendered, and each render is written out under an .apng name.
4. Download per Slide or as a ZIP: Each slide appears on its own row with its own download link, plus a Download All (Zip) button for the whole set. No sign-up, no watermark.

If You Wanted a Looping Deck Instead

Frequently Asked Questions

Does this stitch my slides into one animated APNG?

No, and any converter page that says it does is describing something else. On this route each rendered slide is written as its own file, so the output is a set of single-frame .apng images rather than one multi-frame animation. The genuine one-file loop on this site is PPTX to GIF, which assembles the rendered slides into an animated GIF.

Then what is the Framerate dropdown for?

It belongs to the image-to-animation conversions, where a set of uploaded images really does become one timed animation. The control appears here because APNG is an animation-capable target, but nothing on the presentation route reads it — the value is not carried into the file that gets written. The same is true of the Combine? choice.

Will an .apng file from this page open normally?

Yes. Every APNG carries a standard PNG default image, and that fallback is the whole file here — so browsers, image viewers and editors that have never heard of APNG will still show the slide correctly. Some older desktop tools filter by extension rather than by content, in which case renaming the file to .png makes it open; PPTX to PNG avoids the question altogether.

How many files and what pixel size will I get?

One file per slide, in slide order. Dimensions are the slide size in inches multiplied by 300, since presentations always render at 300 DPI here: Microsoft's widescreen default of 13.333 × 7.5 in produces 4000 × 2250 px, and a 4:3 slide at 10 × 7.5 in produces 3000 × 2250. Speaker-notes pages are not exported, so the file count matches the slide count.

Which browsers actually support APNG animation?

Caniuse puts global support at 95.94%. Firefox has read APNG since version 3, Safari since 8, Chrome since 59, and Edge since 79 — that is effectively the entire modern browser landscape. The gap is outside browsers, where plenty of desktop image tools still treat an APNG as an ordinary PNG and show only the first frame.

Is APNG better than GIF for slide content?

On image quality, comfortably. GIF is limited to 256 colours per frame and to 1-bit on/off transparency, which posterises gradients and leaves jagged edges on anti-aliased slide text; APNG stores up to 24-bit colour with a full 8-bit alpha channel and compresses losslessly. GIF's advantage is universal, no-questions-asked support in ancient software — and, on this site, that it is the target which actually produces a single looping file from a deck.

Do animations, transitions and speaker notes carry over?

No. The layout step composites each slide into one static state, so animation builds appear finished, transitions are discarded, and embedded audio or video is dropped. Speaker-notes pages are not exported either. If you need the deck's motion preserved, PowerPoint's own animated-GIF export honours slide timings and builds in a way a server-side render of the static slides cannot.

Can I use a legacy .ppt file here, and what happens to my upload?

This page takes the .pptx package; for the pre-2007 binary format use PPT to GIF or PPT to PNG depending on which output you actually want. Whichever you use, the file travels over an encrypted connection, is converted on our servers, and is deleted automatically after a few hours along with everything it produced — no sign-up, no watermark, never shared or made public.