What this does

This turns a PDF into a real .pptx presentation — one page per slide — that opens in PowerPoint, Keynote, LibreOffice Impress and Google Slides. The whole conversion runs in this page. Your PDF is never uploaded.

The choice that matters

Every PDF-to-PowerPoint converter has to answer one question, and most of them don't tell you how they answered it: is a slide made of text, or is it a picture of text?

Editable text boxes is the reason to want a .pptx at all. Each block of text becomes a box you can click into and retype, keeping its size, weight, colour and typeface. The cost is that a PDF doesn't record where one block ends and the next begins — it records characters at coordinates — so the grouping is worked out from the geometry. It gets prose, headings and columns right; it will occasionally split a block that should have stayed together, or join two that shouldn't have.

A picture of each page is exact. The page is drawn as an image and placed edge to edge, so it looks precisely like the PDF. Nothing on it can be edited, which for a deck you only need to present rather than change is often the right answer.

How the layout is worked out

In text mode, the characters are gathered into lines, then lines into blocks. Three things break a block: a jump in type size, because that's a heading rather than a continuation; a vertical gap wider than about two lines; and no horizontal overlap with the block above, which is what keeps two columns from being stitched into one box.

Positions are then flipped and scaled. A PDF measures upward from the bottom-left of the page in points; PowerPoint measures downward from the top-left in EMUs, of which there are 914,400 to the inch. If you ask for a slide size that isn't the page's own shape, the whole page is scaled to fit and centred — and the type is scaled by the same amount, so nothing overflows the box it was measured from.

How to use it

Drop in a PDF.
Pick editable boxes if you want to change the words, or a picture if you want it exact.
Leave the slide size on Match the page unless you need 16:9 for a projector.
Convert, and download the .pptx.

What it won't do well

Scanned pages have no text. If the PDF is a photograph of a document there are no characters to place, only pixels. Text mode will tell you it found nothing rather than hand you an empty deck; use a picture of each page instead, or run the file through OCR first.
Tables don't come across as tables. A table's cells land as separate text boxes where they sat on the page. They look right, and you can edit them, but PowerPoint won't know it's a table.
Vector drawings are dropped in text mode. Charts, diagrams and logos drawn as paths rather than pictures aren't carried over. If the page is mostly a diagram, a picture of the page keeps it.
Line breaks are kept as they were. Each line in the PDF becomes its own line in the box rather than re-wrapping, because the box was measured from those lines. Retyping a heading may leave you re-breaking it yourself.
Fonts have to exist on the machine that opens it. The typeface is named, not embedded, so a PDF set in something unusual will be substituted.

Frequently asked questions

Is my file uploaded?

No. It's read and converted in your browser. You can watch the network panel while it runs, or disconnect from the internet once the page has loaded and convert anyway — it still works.

Why is the text in lots of small boxes?

Because that's how it was laid out. A page with a heading, three paragraphs and a caption has five blocks, and each becomes its own box so you can move them independently. If you'd rather have one unbroken picture, use a picture of each page.

Why did my deck come out portrait?

Because the PDF was. Match the page gives the slides the document's own proportions, which for an A4 report means portrait slides. Choose 16:9 or 4:3 to get the usual landscape shape; the page is scaled to fit and centred.

Can I get the original PowerPoint back?

Not exactly — that file no longer exists in the PDF. What you get is a reconstruction: the same words in the same places, but the animations, transitions, speaker notes and master layouts were never in the PDF to recover.

Does it work the other way round?

Yes — PowerPoint to PDF takes a .pptx and gives you a PDF, one slide per page.