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PPTX converter

A .pptx file is a PowerPoint presentation stored as a ZIP archive of PresentationML XML parts — one XML file per slide, plus layouts, masters, themes, and media. It has been the default slide format since Office 2007.

Private for supported formats — processed in your browser

Convert supported files

Runs on your device

Drop PPTX files here

Batch files can each use a different output. Nothing uploads for local conversions.

Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.

Where PPTX comes from

PresentationML is the third pillar of Office Open XML, published by ECMA in 2006 and adopted by ISO in 2008 alongside its word-processing and spreadsheet siblings. Microsoft shipped it as PowerPoint 2007's default and has evolved it in place ever since.

How PPTX works

  • Each slide is its own part at ppt/slides/slideN.xml; shapes and text use DrawingML, shared with Word and Excel charts.
  • Layouts and masters cascade: a slide inherits placeholders from its layout, which inherits from the slide master.
  • Images, audio, and video are stored unmodified under ppt/media/ and wired up through relationship IDs.
  • Speaker notes live in separate notesSlide parts, cleanly separable from the visible deck.

When to use PPTX

  • Business and conference presentations.
  • Lecture slides distributed to students.
  • Decks circulated for review, where speaker notes must travel along.
  • Corporate template and theme distribution.

Strengths and limitations

Strengths

  • Open, documented structure — extracting slide text is a matter of unzipping and reading XML, the approach this site uses client-side.
  • Media is stored without recompression, preserving original quality.
  • Broad application support well beyond PowerPoint itself.

Limitations

  • Media-rich decks produce very large files.
  • Animations and transitions render inconsistently outside PowerPoint.
  • Fonts are not embedded by default, so layouts shift on machines missing them.

Compatibility

PowerPoint 2007 and later, LibreOffice Impress, Apple Keynote, and Google Slides all open .pptx, with solid mobile app coverage. Fidelity is highest for static content; complex animation is where implementations diverge.

Creator, title, and modification dates sit in docProps/core.xml, with slide, word, and hidden-slide counts in docProps/app.xml.

Convert PPTX to another format