Open Document Presentation

OpenDocument Presentation (ODP) is an open, vendor-neutral slide-deck file format, standardized internationally as ISO/IEC 26300 (based on the OASIS OpenDocument Format, ODF). It exists as a royalty-free alternative to Microsoft's proprietary .pptx, and is the presentation member of the OpenDocument family alongside Open Document Text, Open Document Spreadsheet, Open Document Graphics, Open Document Formula, and Open Document Database.

Package structure

An .odp file is a ZIP archive containing a set of XML sub-documents rather than one monolithic file:

• mimetype — a plain-text file holding the string application/vnd.oasis.opendocument.presentation; per spec it must be the first entry in the ZIP and stored uncompressed, so a reader can identify the format without inflating the archive — the same trick EPUB borrows from ODF.
• content.xml — the actual slide content: text, shapes, and images, positioned per slide.
• styles.xml — styles and master-page (slide-master) definitions shared across the presentation, separated from content so the same visual design can be reused or swapped.
• meta.xml — document metadata (author, creation/modification dates, editing statistics).
• settings.xml — application-specific state (e.g. current view, print settings) that isn't part of the document's actual content.
• META-INF/manifest.xml — an index of every file in the package and its media type, plus encryption metadata if the file is password-protected.
• Thumbnails/thumbnail.png and a Pictures/ (or similar) directory for the preview image and embedded media.

Slide content model

Inside content.xml, an <office:presentation> element contains a sequence of <draw:page> elements — one per slide — each holding absolutely-positioned drawing shapes (text boxes, images, embedded objects). Each <draw:page> references a <style:master-page> (from styles.xml) that supplies the slide-master concept: background, placeholder positions, and fonts inherited across every slide that uses it, the same idea as PowerPoint's slide masters or Google Slides' themes.

Capabilities

Like .pptx, ODP supports rich text, images, embedded video and audio, shapes, animations, and slide transitions — it's a full-featured presentation format, not a stripped-down one.

Software compatibility

| Category | Software | | --- | --- | | Native/open-source | LibreOffice Impress (its default format), Apache OpenOffice Impress, Calligra Stage | | Cloud-based | Google Slides (imports and exports .odp) | | Commercial | Microsoft Powerpoint (Microsoft 365 can open, edit, and save directly to .odp) |

ODP vs. PPTX

Both are ZIP-compressed XML packages that work similarly under the hood, but differ in:

• Ownership and cost — ODP is a freely implementable open standard with no licensing restrictions; historically, fully exercising every .pptx feature meant staying inside the Microsoft ecosystem or subscription.
• Round-trip fidelity — converting back and forth between .pptx and .odp can lose formatting, break animations, or shift layout when one file relies on a vendor-specific visual effect the other format doesn't model — the same class of risk as any lossy format conversion, not unique to ODP.

Common pitfalls

• Treating .odp and .pptx as perfectly interchangeable — complex animations, custom fonts, and vendor-specific effects can shift or disappear on conversion; verify a converted deck visually rather than assuming byte-for-byte fidelity.
• Editing the ZIP contents by hand without preserving the mimetype rule — re-zipping the package with mimetype compressed, or not first in the archive, can produce a file some readers refuse to recognize as ODP.
• Assuming ODP implies LibreOffice-only — it's an open standard that Google Slides and Microsoft PowerPoint both read and write natively; a file arriving as .odp doesn't mean the author used LibreOffice.

Learn more

• ISO/IEC 26300 — the international standard defining OpenDocument Format.
• OASIS OpenDocument Format — the underlying OASIS specification ODP implements.
• Microsoft Powerpoint for the closest proprietary equivalent, .pptx.
• Google Slides for a cloud-based tool that natively imports/exports .odp.
• Open Document Text, Open Document Spreadsheet, Open Document Graphics, Open Document Formula, Open Document Database for the other members of the OpenDocument family.