Sending a deck as a .pptx is a gamble. A missing font, a different version of PowerPoint, or a phone viewer is enough to shift your layout into something you never designed. Upload your .pptx or .ppt above and get a PDF that looks the same on every device, in every reader.
Below: why the layout actually holds, the one decision that changes what your PDF is for, and the things that live inside a deck and should not travel with it.
The difference comes down to fonts, and it explains almost every layout problem people have with presentations.
A .pptx names the fonts it uses and expects the reader's computer to supply them. If your deck uses a corporate typeface, or something you downloaded, or even a Microsoft font that a Mac does not have, PowerPoint substitutes another. The replacement has different letter widths, so text overflows its box, headings wrap onto two lines, and carefully aligned elements drift apart.
A PDF embeds its fonts. The file carries its own typography, and every decision about position and spacing has already been made. There is nothing left to interpret, which is why it looks identical everywhere — and why it is the right format any time you are sending a deck rather than presenting it yourself.
The same applies to file size. A PDF of a deck is usually much smaller, because it holds the flattened result rather than every original image at full resolution, plus the slide masters and layouts you never used.
This is the choice that determines whether your PDF is useful, and most people never think about it.
One slide per page is the default. Every slide fills a landscape page. Good for reading on screen, for sending a deck someone will scroll through, and for anything where the slides are the content.
Handout layouts place several slides on a portrait page — typically three with lined space beside them for notes, or six for a compact reference. Better for printing, for a workshop where people write alongside, and for a deck someone needs to scan quickly rather than read in sequence.
Notes pages put one slide at the top of each page with the speaker notes printed underneath. This is the layout for a presenter's own copy, or for sending a deck to someone who was not in the room and needs the commentary as well as the slides.
If the tool only produces one slide per page, PowerPoint's own File → Export gives you the other layouts. Worth the extra minute when the deck is going to be printed.
Converting is faithful, which means it faithfully carries across things you may have forgotten are in the file.
Speaker notes. Your reminders, the caveats, the figure you were not going to say out loud. They do not appear in one-slide-per-page output, but they remain in the original .pptx if you send that too — and they will appear if anyone exports notes pages. Run the deck through PPTX to TXT to see everything in one scrollable list, or strip them with Clear Notes.
Hidden slides. Right-click, Hide Slide, and it is skipped during a show — but the content is still fully present in the file. Old pricing, a cut section, last quarter's numbers. Whether hidden slides appear in the PDF depends on the export settings, so check the output rather than assume.
Animated builds. A PDF page is a single still frame, so each slide is captured in its final state with everything visible at once. If a build was revealing points one at a time to control the story, the printed version gives it all away immediately. Where that matters, duplicate the slide and delete elements progressively so each stage becomes its own page.
Video and audio. They cannot exist in a PDF. Embedded media appears as a static poster frame or a blank rectangle. If a clip carried real information, add a slide summarising it or a link to it online.
A useful trick worth knowing: a PDF works perfectly well as a presentation file.
Open it in almost any reader and press Ctrl+L (Cmd+L on a Mac) for full-screen mode. Arrow keys move between slides, and the layout is guaranteed — no missing fonts, no version differences, no PowerPoint required on the machine you are borrowing.
You lose animations and transitions, and you lose presenter view with its notes and timer. But for a conference laptop, a client's meeting room, or any situation where you cannot control the computer, a PDF on a memory stick is the most reliable thing you can carry.
Compress PPTX shrinks the original deck, PPTX to JPG renders individual slides as images, PPTX to Word turns the text into a document, and Compress PDF reduces the finished file. Browse all PPTX tools.