.pptx File — Office Open XML Presentation

PPTX is the default presentation format for Microsoft PowerPoint since Office 2007, based on the Office Open XML standard. A PPTX file is a ZIP archive containing XML files that define slides, slide layouts, master slides, themes, animations, and transitions, along with embedded media assets. The format supports high-fidelity rendering of complex presentations with SmartArt graphics, 3D effects, morph transitions, embedded video and audio, and real-time collaboration features. PPTX files are generally smaller than their PPT predecessors due to ZIP compression of the XML content. The open specification enables third-party tools to create and modify presentations programmatically, which is valuable for automated report generation and template systems. The format is widely supported across platforms and devices, making it the standard for business presentations, educational materials, and conference talks worldwide.