ODP File Format: How to Open, Edit and Convert It in New Zealand

If someone in New Zealand has sent you a file ending in .odp and it will not open the way a normal PowerPoint deck does, you have received an OpenDocument Presentation. It is a completely standard, free presentation format — not a corrupted or unusual file — and you can open, edit and convert it on Windows, macOS, Linux, ChromeOS, and even a phone without buying any software. This guide explains plainly what an ODP file is, how it is built, which free tools open it, how to convert it to PowerPoint (.pptx) or PDF without wrecking the layout, and the formatting traps to watch for along the way.

What is an ODP file?

An ODP file is a slide presentation saved in the OpenDocument Presentation format — the open, royalty-free standard for slide decks, equivalent in purpose to Microsoft PowerPoint’s .pptx file. It holds everything a presentation needs: slides, text, bullet lists, tables, images, drawn shapes, speaker notes, and transition settings. The extension “.odp” simply tells your computer which program understands the file.

The format is part of the OpenDocument Format (ODF), a family that also covers text documents (.odt) and spreadsheets (.ods). ODF is maintained by OASIS, an international standards consortium, and is published as an ISO standard (ISO/IEC 26300). Because the specification is public, any developer can write software that reads or writes ODP files without paying a licence fee — which is exactly why so many free tools support it.

What is actually inside an ODP file?

An ODP file is not a single document — it is a ZIP archive (a compressed folder) containing several smaller XML files plus any images you added. If you rename a copy from deck.odp to deck.zip and open it, you will see the pieces that make up the presentation:

• content.xml — the actual slides and the text on them.
• styles.xml — fonts, colours, master slides and formatting rules.
• meta.xml — document properties such as author and edit date.
• settings.xml — view and application settings.
• manifest.xml — a list of every file in the package.
• mimetype — a tiny marker that identifies the file as a presentation.

The first entry in the archive is always an uncompressed mimetype file, which is why programs can recognise an ODP instantly from its file signature — the short sequence of bytes at the start of a file, sometimes called a “magic number”, that software uses to identify a format. (Wikipedia keeps a reference list of these signatures.) You do not need to touch any of this to use an ODP file, but it explains why the format is so stable: it is just plain, documented text and standard ZIP compression, with nothing hidden or proprietary.

ODP vs PPTX: what is the difference?

Functionally they do the same job — both display slide shows — so the practical difference is about ownership and openness. PPTX is Microsoft’s format: it is now based on a published standard too, but it is developed and controlled by one company. ODP is a vendor-neutral standard governed by a committee, so no single company can change it, charge for it, or discontinue it. For long-term archiving — government records, university material, community-group history — that neutrality is the main attraction, because a well-formed ODP will still open decades from now regardless of which companies survive. If you work mainly with ODF documents, our guides to ODS spreadsheet files and ODT text files cover the two sister formats.

Why organisations in New Zealand use the ODP format

ODP turns up across Kiwi schools, universities, councils and small businesses for a few consistent reasons:

• No licensing cost. Schools, non-profits and budget-conscious teams can create and share decks without anyone needing a paid software subscription to open them.
• Long-term readability. Because the format is a published ISO standard, ODP files stay readable even if a vendor changes its pricing or retires an application — useful for records that must be kept for years.
• Cross-platform by default. The same file opens on Windows, macOS, Linux and ChromeOS, on anything from an old laptop to a new workstation.
• No lock-in. Anyone can build tools that read ODP, so you are never tied to one company’s roadmap.

How to open an ODP file for free

You do not need to buy anything to open an ODP file. Several free, legitimate tools handle the format well — the right one depends on whether you prefer desktop software, a browser, or the office suite your workplace already runs.

LibreOffice Impress and Apache OpenOffice (desktop)

LibreOffice is the most complete free option, and ODP is its native format, so files open with the highest fidelity here. The presentation app inside the suite is called Impress; it installs on Windows, macOS and Linux, runs fully offline, and has no ads or paywalled features. Apache OpenOffice Impress is a related free suite that also opens ODP natively, though LibreOffice is updated more frequently. To get started, download the suite from the official site, install it, and double-click the file — see our walkthroughs of OpenOffice Impress and downloading LibreOffice for step-by-step setup. Always download from the official project pages rather than third-party “download helper” sites, which sometimes bundle unwanted extras.

Google Slides (in your browser)

Google Slides can open ODP files directly, which suits anyone who works in a browser or collaborates with a remote team in real time. Upload the file to Google Drive, then open it with Google Slides and it converts to an editable deck. Google added full OpenDocument import and export in November 2016, so you can also go the other way and download any Slides deck as .odp. The trade-off is fidelity: complex tables, custom shapes and some animations can shift or simplify during the conversion, so always check the result slide by slide before presenting.

Microsoft PowerPoint

Modern PowerPoint — the Microsoft 365 desktop app, the recent standalone versions, and PowerPoint for the web — can open, edit and save ODP files without any add-in. Use File > Open and pick the .odp file as you would any other. Be aware that some PowerPoint-only features do not survive the round trip: SmartArt graphics, transition sounds, and certain entrance or exit animations are changed or dropped, because the ODP format does not define them. For everyday text-and-image decks this is rarely a problem; for heavily animated decks, expect to tidy up afterwards.

On a phone or tablet

The simplest mobile route is the Google Drive app on iOS or Android: upload the ODP file, open it in the mobile Google Slides app, and you can view, lightly edit, and export it. Collabora Office, a mobile build based on LibreOffice, is another free option that opens ODP directly. Either way, a small screen makes mobile editing best for quick fixes rather than heavy design work.

How to convert an ODP file to PowerPoint or PDF

If you are sending a deck to a client, a government tender panel, or anyone who expects a PowerPoint or a fixed document, convert the ODP first so the layout arrives exactly as you intend. There are two conversions worth knowing: to .pptx (still editable) and to PDF (locked for viewing).

Convert ODP to PowerPoint (.pptx)

Choose whichever tool you already have open:

• In LibreOffice Impress: open the ODP file, then choose File > Save a Copy (or Save As), set the file type to PowerPoint 2007-365 (.pptx), and save. Keep the original .odp as your master copy.
• In Google Slides: open the deck, then choose File > Download > Microsoft PowerPoint (.pptx).
• In PowerPoint: open the .odp, choose File > Save As, and pick PowerPoint Presentation (.pptx) as the format.

After converting, open the new .pptx and review fonts, spacing and any animations, since some elements can shift between engines.

Convert ODP to PDF

A PDF is the safest choice when the recipient only needs to view or print the deck and will not edit it — it looks identical on every device. The steps are quick:

• In LibreOffice Impress, use the Export as PDF button or File > Export As > Export as PDF.
• In Google Slides, choose File > Download > PDF Document (.pdf).
• In PowerPoint, use File > Save As or Export and select PDF.

Exporting flattens your text, images, shapes and tables into a fixed layout that cannot be accidentally rearranged, which is why PDF is the standard for final deliverables. If you work the other way around and need editable files from PDFs, our guide on converting between ODF and PDF covers the document side of the same workflow.

A note on online converters

Dozens of websites offer to convert ODP files in your browser. They can be handy for a one-off, but you are uploading your slides to a stranger’s server. Never use them for commercial, personal or sensitive material — install LibreOffice or use Google Slides instead, both of which keep the conversion under your own control.

ODP vs PPTX vs PDF: which should you send?

The right format depends on what the recipient needs to do with the file. Send an editable format when you want collaboration, and a fixed format when the design must not change. The table below compares the three formats you will meet most often so you can choose quickly.

Formatting problems to watch for

Most ODP headaches come from moving a file between different programs, because each one interprets layout rules slightly differently. Knowing the common failure points lets you catch them before you present. The three that recur most often are font swaps, animation loss, and table drift.

• Font substitution. If a deck uses a font that is not installed on the opening computer, the program swaps in a default such as Arial or Calibri. That changes line lengths, so text can wrap awkwardly or spill out of a box. Sticking to widely installed fonts avoids most of this.
• Animations and transitions dropping. Complex transitions, 3D effects and custom timings built in one suite often simplify to a plain fade — or disappear — when opened in another. For anything animation-heavy, rehearse in the program you will actually present from.
• Table and shape drift. Dense tables, merged cells and grouped shapes can shift by a few pixels during conversion, leaving borders slightly misaligned. A quick manual nudge usually fixes it.

Common mistakes when sharing ODP files

A few avoidable errors cause most of the complaints Kiwi teams run into:

• Assuming the recipient can open it. If you do not know what software they use, send a PDF (for viewing) or a .pptx (for editing) alongside the .odp.
• Sending the editable file as the final version. For a locked deliverable, export to PDF so nobody can rearrange your slides.
• Not checking after conversion. Always reopen the converted file and scan every slide for shifted text, missing fonts or broken animations.
• Using niche fonts. Embed fonts where the tool allows it, or design with common typefaces so your layout survives the trip.
• Trusting random online converters with private data. Keep sensitive decks on software you control.

Security and privacy with ODP files

ODP files are as safe as the tools you open them with, and the format itself supports real protection. In LibreOffice, when you save a presentation you can tick Save with password to encrypt the file so it cannot be opened without the passphrase — useful for confidential decks. Keep the passphrase somewhere safe, because there is no recovery if you lose it.

If you edit in the cloud, your slides sit on the provider’s servers, so choose a reputable service and understand its settings. In New Zealand, the Privacy Act 2020 requires organisations to take reasonable steps to protect the personal information they hold, including information stored in documents and on cloud platforms. That duty rests with the organisation handling the data, not with the file format — so if a deck contains personal details about staff, students or customers, manage access and sharing carefully regardless of whether it is an ODP, a PPTX or a PDF.

Who should use ODP?

ODP suits anyone who wants a free, future-proof, vendor-neutral way to make and share presentations: students and teachers who cannot assume everyone owns Microsoft 365, public agencies and non-profits keeping costs down, and anyone archiving material for the long term. If your audience lives entirely inside Microsoft 365 and leans on PowerPoint-only animations, working natively in .pptx may be smoother — but even then, ODP remains a reliable, open interchange format you can always fall back on. For a wider look at the free suites that use it, see our comparison of presentation tools and alternatives.

Frequently Asked Questions (FAQ)

What is an ODP file and why did I receive one?

An ODP file is a slide presentation saved in the open OpenDocument Presentation format. You most likely received one because the sender used a free office suite such as LibreOffice Impress or exported it from Google Slides. It is a standard, safe file — you can open it without buying any software.

Can I open an ODP file for free?

Yes. LibreOffice Impress and Apache OpenOffice open ODP files natively on Windows, macOS and Linux, Google Slides opens them in any browser, and modern Microsoft PowerPoint can open them too. On a phone, the Google Drive and Google Slides apps handle ODP files. None of these options requires a paid licence to view the file.

How do I open an ODP file in Microsoft PowerPoint?

Open PowerPoint, choose File then Open, and select the .odp file — modern PowerPoint reads it directly with no add-in. Keep in mind that some PowerPoint-only features, such as SmartArt and certain animations, may change or drop because the ODP format does not define them, so check the slides after opening.

Why did my fonts or layout change when I opened an ODP file?

This usually happens when the presentation uses a font that is not installed on your computer, so the program substitutes a default typeface and the text re-wraps. Select the affected text boxes and switch to a widely available font such as Arial or Calibri, or install the original font, to restore the intended layout.

What is the difference between an ODP and a PPTX file?

Both store slide presentations and do the same job. The difference is governance: ODP is an open, royalty-free standard maintained by the OASIS consortium and published as an ISO standard, while PPTX is developed and controlled by Microsoft. ODP’s neutrality makes it a strong choice for long-term archiving and for sharing without forcing anyone to buy specific software.