View PowerPoint (.pptx) presentations in your browser with slide navigation.
A .pptx file is not a document; it is a ZIP archive holding XML parts, one per slide, plus masters, layouts, images, and media. This tool unpacks that archive in your browser, reads the slide parts, and draws each slide for you, with controls to step through the deck in presentation order. The thing people get wrong: what you see is a re-rendering, not a snapshot. Fonts you do not have installed are substituted, effects are approximated, and animations are skipped, so the deck can look and read differently than it does in PowerPoint.
A concrete input and expected output from the current implementation.
Input
A 13-slide .pptx, 16:9 widescreen, with title text and one picture on each slide.
Expected output
13 slides rendered one at a time in presentation order, starting with slide 1, with controls to move forward and back through the deck.
The slide count and order are read from the slide list inside the package, so they are determined by the file itself: a 13-slide deck must show exactly 13 slides in the order the author set.
A .pptx is an OPC package: a ZIP archive whose entries are XML parts and media. Slide text and shapes live in ppt/slides/slideN.xml; their look is inherited from layout and master parts, and the order in which slides play comes from the slide list in the presentation part. The tool reads these parts directly from the file you choose, entirely in the browser.
Each slide is drawn by placing its recorded shapes and text boxes at the slide's declared size, measured in EMUs (914400 per inch), scaled to fit your window. Text is laid out with the fonts your system has; a missing font falls back to a substitute, which can change line wrapping and cause overflow. Embedded pictures come from the extracted media parts. Animations, transitions, and embedded media are generally not replayed.
No. This is a read-only viewer: it parses the package and draws slides, with no path for writing changes back into it. To edit, use PowerPoint, LibreOffice, or another editor on the original file. You can still copy text out of the rendered slides for reuse elsewhere.
No. The file is unpacked and parsed entirely in your browser, and nothing from it is sent over the network, which is also why the viewer keeps working if your connection drops after the page loads. Your copy of the file is the only record you have, so keep it.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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