PPT

PPT stores everything—text runs, slide geometry, embedded media—as fixed binary records inside an OLE2 Compound File, with no XML or plain-text layer a preview generator can simply read. Producing an accurate thumbnail means either invoking PowerPoint's own rendering engine or walking those binary streams with a library like Apache POI. PPTX, by contrast, is a ZIP of XML parts a thumbnailer can unzip and parse directly, so PPT previewing in a DAM pipeline typically needs a heavier, slower conversion step.

Generally yes: converting to PPTX gives the DAM a ZIP/XML structure that indexers, search engines, and web viewers can parse directly, without maintaining a legacy binary-parsing dependency long-term. It also tends to shrink storage footprint, since PPTX's compressed XML is usually more compact than the equivalent OLE2 binary. The safer approach is converting a working copy for cataloging and preview purposes while retaining the original PPT file in storage, so legal or provenance requirements tied to the exact source binary are never lost.

Yes—modern PowerPoint still ships a compatibility import filter for the PowerPoint 97-2003 binary format and opens PPT files in Compatibility Mode, which restricts editing to features that existed when the format was current. Rendering is generally faithful for text and standard layouts, but elements like legacy Microsoft Graph charts, older animation timings, and unavailable fonts can shift on redisplay as Microsoft's engineering attention stays focused on the PPTX code path. For catalog purposes, a quick visual check after opening older files is worth the minute it takes.

Yes—because a PPT file is an OLE2 Compound File, it can contain a VBA project stream alongside the slide records, and PowerPoint will offer to run those macros when the file opens unless macro settings block it. The same container can also hold embedded OLE objects, including packaged files that aren't presentations at all, a known route for disguised executable content. Since there's no format-level split between 'safe' and 'macro-enabled' PPT the way OOXML separates .pptx from .pptm, every uploaded PPT should be treated as potentially macro-bearing and scanned before wide distribution.

For someone just clicking through slides in PowerPoint or a full-featured viewer, PPT and PPTX can look effectively identical—text, layout, and images render the same way. The difference shows up in the software ecosystem behind the scenes: PPTX is an open, ISO/IEC 29500-standardized ZIP-of-XML format that browsers, mobile apps, and third-party viewers can implement without licensing anything, while PPT's binary structure is documented but far less commonly supported outside Microsoft's own products. That's why a PPT file is more likely to render slightly off, or fail to open at all, in a lightweight or web-based viewer.

Yes, but it takes more than a zip tool. PPT keeps embedded images inside a 'Pictures' stream within the OLE2 container, stored as a sequence of binary records with type headers, so a library like Apache POI has to parse that stream and identify each image's format (WMF, EMF, JPEG, PNG, DIB) before it can save the bytes out as a usable file. In PPTX, by contrast, every embedded image is already a standalone file under ppt/media/ inside the ZIP archive, so any archive utility can pull them out directly—no format-aware parsing required.

The PowerPoint 97-2003 Binary File Format—used from 1997 through Office 2007's PPTX switch—is essentially a single stabilized structure, and it's the version modern PowerPoint, LibreOffice Impress, and Google Slides all reliably import today. Files from the earlier 1987-1996 era, when the format was still evolving through Forethought's original Mac release and PowerPoint's early Windows versions, used older binary layouts that current software doesn't uniformly guarantee support for. For a DAM ingesting truly old decks, it's worth test-opening in more than one tool and generating a PPTX or PDF proxy as a fallback.

Yes. The conversion engine has to remap PPT's binary records onto PPTX's XML schema, and most text boxes, layouts, and images map over cleanly since the underlying visual model didn't change. The friction shows up in older features that predate a clean XML equivalent—legacy Microsoft Graph chart objects, older animation and transition timing models, WordArt, and custom bullet or numbering schemes—where the converter approximates rather than translates exactly, sometimes shifting spacing, fonts, or object positions. Slide-by-slide spot-checking after conversion is worthwhile, especially for animation-heavy or visually dense decks.