Converting a PowerPoint presentation to PDF is the standard way to share slides with people who don't have PowerPoint, to send a read-only version of a deck, to attach a presentation to an email without risking accidental editing, and to archive a final version of a presentation that will render identically on any device.
What is preserved in the conversion
Slide content: text, images, charts, tables, shapes — all preserved as static content in the PDF. Slide order matches the presentation order.
Fonts: LibreOffice embeds the fonts present in the system. If the presentation uses a font that is not installed on the conversion server, LibreOffice substitutes a fallback font (typically a similar serif or sans-serif). For presentations that use standard fonts (Arial, Helvetica, Times New Roman, Calibri), the output is visually accurate. Presentations built with custom brand fonts may show substitutions.
Slide notes are not included in the PDF by default — only the slide content is exported.
Animations and videos
PDF is a static format — animations do not transfer. Each slide is exported at its final state (all animated elements in their end position). Slide transitions are not represented. Videos embedded in slides are not included — only a static poster frame may appear, or the area may be blank.
If the presentation relies heavily on animations to tell a story step by step, consider creating PDF handouts from PowerPoint directly (File → Export → Create Handouts) which gives more control over how animated elements are captured.
.pptx vs .ppt
.pptx is the modern format introduced in PowerPoint 2007. It is an Open XML format and is what PowerPoint produces by default. .ppt is the legacy binary format from PowerPoint 97–2003.
Both formats are supported by Filum's PPT to PDF tool (LibreOffice Impress handles both). .pptx generally converts with higher fidelity because the Open XML format is more transparent to LibreOffice's reader. Legacy .ppt files with complex animations or embedded objects may render slightly differently.
Using Filum's PPT to PDF tool
Upload the .pptx or .ppt file. Filum sends it to a LibreOffice Impress server, which exports the presentation to PDF — one page per slide. Your file is sent over an encrypted connection, converted, and immediately deleted. No account is needed.