Upload your .pptx or .ppt above and every slide comes back as a separate PNG image — rendered exactly as it appears when presented, with every element in place.
PNG is the right choice for most slides, and the reason is worth understanding rather than taking on trust. Below: what lossless actually means here, when JPG is genuinely the better option, and the resolution numbers that decide whether your image looks sharp.
The two formats were designed for different kinds of picture, and slides fall squarely on PNG's side.
JPEG compression was built for photographs. It works by discarding detail the eye is unlikely to notice in continuous, gradual tones — skin, sky, foliage. It handles hard edges badly, because hard edges are exactly the information it is designed to throw away. The result around text is faint halos and a soft mush in small type, obvious the moment someone zooms in or the slide is projected at three metres wide.
PNG is lossless. Every pixel is reproduced exactly, no matter how many times the file is saved. A slide is mostly text, flat colour, chart lines and logo edges — precisely the content JPEG mishandles and PNG preserves perfectly.
PNG also supports transparency, which JPG does not. If you want a slide element to sit over a coloured background elsewhere, or a logo without a white box around it, only PNG can do it.
One thing that cannot be undone: if a source image inside your deck was already a JPEG, exporting to PNG does not restore the sharpness it lost. It preserves the existing damage in a larger file.
PNG is not always right, and pretending otherwise wastes your bandwidth.
Lossless means bigger — often several times bigger. For a slide dominated by a full-bleed photograph, PNG stores every pixel of a picture where the eye genuinely cannot detect JPEG's compression. You gain nothing visible and pay for it in file size on every page load.
Choose JPG for photo-heavy slides, for anything going onto a web page where load time matters, and when you need to attach a lot of slides to an email.
Stay with PNG for text, charts, diagrams, tables, logos, screenshots, and anything a reader will zoom into or print.
A mixed deck is a judgement call. If most slides are text with one photographic title slide, PNG throughout is simpler than managing two formats.
Softness in an exported slide is almost always a mismatch between the output size and where the image is being displayed.
A standard widescreen slide is 16:9. Useful reference points:
Two rules cover most of the trouble. Never enlarge afterwards — upscaling cannot invent detail, so a small image stretched across a poster or a slide deck looks blurry regardless of the software. And for print, think in inches: a good print needs roughly 300 pixels per inch, so an image that will occupy six inches across a page wants about 1800 pixels of width.
If your exported slide shows text overflowing its box, or a heading wrapping where it did not before, the cause is a missing font rather than the image format.
Rendering happens on a server, using the fonts installed there. Standard faces — Arial, Calibri, Times New Roman, Georgia — are safe. A corporate typeface or a downloaded display font may be substituted with something else, and the replacement has different letter widths, so text that fitted its box now spills out.
If exact typography matters, switch the deck to a standard font before converting, or export directly from PowerPoint on the machine where the font is installed.
Turning a slide into a picture is a trade worth making deliberately.
You gain a file anyone can open with no software, a fixed appearance that cannot shift between machines, something you can drop straight into a document, a web page or a chat message, and content nobody can casually edit or lift your design elements from.
You give up selectable text, and this matters more than people expect. Nobody can copy a quote from your slide, search engines cannot read a word of it, and screen readers find nothing at all — so a slide posted as an image is invisible to blind and partially sighted readers.
If you are posting online, write the alt text. Every platform and CMS supports it, it takes fifteen seconds, and it is the only thing that makes the content readable by either a screen reader or a search engine.
PPTX to JPG suits photo-heavy slides and smaller files, PPTX to PDF keeps the deck as one shareable document, Image to PPTX works the other way, and Compress PPTX shrinks the original. Browse all PPTX tools.