PPTX to PNG Converter

Convert PPTX to PNG Online

Every slide in a PowerPoint deck comes back as its own PNG, rasterised at a fixed 300 DPI. A 12-slide deck returns 12 PNG files — download them one at a time or grab the whole set with "Download All (Zip)". PNG is the right target when the slides are built from text, charts, tables and line art, because it stores hard edges without the ringing that a lossy codec leaves around type.

How to Convert PPTX to PNG

1. Upload Your PPTX File: Drag the deck onto the page or click "Add Files" to browse. Several decks can be queued at once; each one is rendered independently.
2. Choose a Quality Preset: "Very High (Recommended)" is the preselected value. Leave it for everyday use, or switch to "Highest" when you need a true-colour PNG with no palette step at all.
3. Set Colors, Compression speed or Image resolution (optional): "Colors" caps the palette (128 is the preselected size, with Dither switched off); "Compression speed" runs 1-10 and is preselected at 4; "Image resolution" resizes every slide by percentage, by preset height, or to an explicit width and height.
4. Convert and Download: Click Convert, then take the PNGs individually or as a zip. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

What Pixel Size Will Each Slide Be?

There is no DPI control on this page — the render is pinned at 300 DPI. That makes the output size pure arithmetic: the slide's physical size in inches multiplied by 300. Microsoft's own slide-size list includes 10 x 7.5 in for Standard 4:3 and 10 x 5.625 in for 16:9; the sizes below cover what turns up in practice.

Anything smaller is a resize, not a re-render: pick "Image resolution" and give a percentage, a preset height (768p is 768 pixels tall, width follows the slide's aspect) or explicit pixel dimensions.

PNG vs the Other Slide Targets

Photo-heavy decks are usually better served by the PPTX to JPG converter. If you want the whole deck to stay one shareable file, use PPTX to PDF instead — PNG is a single-image format and cannot hold a multi-slide deck.

Frequently Asked Questions

Does a multi-slide PPTX produce one PNG per slide?

Yes — one PNG per slide, named after the source file with a page number. A 12-slide deck comes back as 12 files. There is no way to stack them into one PNG, because the format holds a single image; convert to PDF if you need a single multi-page file.

Can I change the DPI or render resolution of the export?

Not on this page. The "Conversion Quality" DPI selector is only exposed for document sources, so presentations always render at 300 DPI. What you can change is the pixel size afterwards, through "Image resolution" — a percentage, a preset height or an exact width and height. That resamples the 300 DPI render rather than re-rasterising the slide, so scaling down is clean and scaling up is not.

Is the PNG lossless?

Only on the "Highest" preset. Every other preset runs the render through a palette quantiser, which maps the image to at most 256 colours and strips detail to save bytes — alpha survives, but exact pixel values do not. On text and flat-fill diagrams the difference is invisible. On slides with photographic images or wide gradients it is not, which is why "Highest" exists.

My gradient background came out banded. How do I fix it?

That is the palette step. Set "Quality Preset" to "Highest" and the file is written as a true-colour PNG with no quantisation at all — bands disappear, file size roughly doubles or triples on a gradient-heavy slide. If you also touched "Colors" and picked a small palette such as 16 or 32, raise it or return the control to its untouched state.

What do "Compression level" and "Compression speed" actually change?

"Compression speed" is the palette encoder's effort dial, 1 to 10, preselected at 4: lower numbers search harder and produce a slightly smaller file for more CPU time. "Compression level" is the deflate effort used when the PNG is written; on the "Highest" preset it is forced to maximum, and on the other presets the file is rewritten by the palette encoder afterwards, so moving it changes very little. Neither control affects how the slide is drawn — only how the finished pixels are packed.

Will transparent areas on my slides survive?

Our slide renderer produces an ARGB image and no background fill is applied on the way to PNG, so a slide whose background is genuinely set to "No fill" keeps its transparent pixels and PNG stores them with full 8-bit alpha. Most decks inherit an opaque background from their theme or slide master, so in practice most exports come back solid — that is the deck, not the converter.

Does this work with .ppt, .odp or Google Slides exports?

Old binary .ppt and OpenDocument .odp decks have their own converter pages; this one accepts .pptx. Google Slides has no native upload path here — use File, Download, Microsoft PowerPoint (.pptx) in Slides first, then convert that. Slides using fonts that are not installed on the render host are substituted, so embed or flatten unusual typefaces before exporting if exact metrics matter.

My PNGs are far bigger than I expected. What are my options?

A 4000 x 2250 px slide is nine megapixels, so even a well-packed PNG can run into the megabytes on photo-rich content. Three levers, in order of effect: reduce "Image resolution" (halving the height quarters the pixel count), cap "Colors" to 64 or 32 for flat diagrams, or send the results through compress PNG afterwards. For web delivery specifically, PPTX to WebP will usually beat anything PNG can do at the same visual quality.

Are my uploaded presentations kept private?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public.