.SXI file extension

To open .SXI files on Windows, install Apache OpenOffice or LibreOffice (both commonly open legacy Impress files).

To open an .sxi file, use a presentation editor that supports legacy OpenOffice.org/StarOffice Impress files—most commonly Apache OpenOffice Impress or LibreOffice Impress. If your device can’t open it directly (common on mobile), transfer the file to a desktop and convert it to .odp or .ppt.

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Last updated: June 11, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page

Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.

Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .SXI files

Use these platform-specific instructions to open .SXI files safely.

Windows

Install Apache OpenOffice or LibreOffice (both commonly open legacy Impress files).
In the app, use File → Open and select the .sxi file (or right-click the file → Open with → choose the suite).
After opening, use File → Save As / Export to convert to .odp (recommended) or another format you need.

Full Windows guide

Mac

Install LibreOffice (commonly used to open legacy OpenOffice.org Impress files on macOS).
Open LibreOffice Impress, then use File → Open and choose the .sxi file.
If you need better compatibility, save a copy as .odp or export to another format.

Full Mac guide

Linux

Install LibreOffice (commonly available on Linux) or Apache OpenOffice.
Open LibreOffice Impress, then File → Open and select the .sxi file (or use your file manager’s Open With).
Save As to .odp to modernize the file and improve sharing compatibility.

Full Linux guide

iOS

iOS typically won’t open .sxi natively; transfer the file to a desktop and open it in LibreOffice Impress or Apache OpenOffice Impress to convert it to .odp or .pdf.
After conversion, send the .odp/.pdf back to your iPhone/iPad for viewing/editing in compatible apps.

Full iOS guide

Android

Android support for .sxi is often limited; move the file to a desktop and open it in LibreOffice Impress or Apache OpenOffice Impress, then convert to .odp or .pdf.
Open the converted file on Android with a compatible office suite or PDF viewer.

Full Android guide

Security notes

.sxi files are complex document formats that may stress or exploit bugs in document parsers; open files from unknown sources with caution, especially if they came from unsolicited email attachments.
If you only need to view the slides, consider opening in a trusted office suite and exporting to PDF before sharing or long-term archiving, reducing reliance on legacy-format parsing.
Be cautious with any prompted actions after opening (such as enabling automation features, external content links, or embedded objects) and prefer keeping the file offline if its origin is uncertain.

If you did not expect this file

This extension is usually plain data, text, or structured content—not a program by itself. The practical risk is social engineering (a scam attachment or misleading filename). For trusted senders you rarely need heavy-handed antivirus wording; use these tools when you want an extra check on unexpected downloads.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

Norton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.

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Can't open this file?

These are the most common causes and fixes when .SXI files fail to open.

Common reasons

The .sxi file won’t open or opens as gibberish
Fonts/layout look different than expected
Can’t open .sxi on phone/tablet

Fix steps

Open it from inside LibreOffice Impress or Apache OpenOffice Impress (File → Open) instead of relying on double-click file associations.
Re-download or re-copy the file if it may have been truncated (especially if received by email or from a failing USB drive).
If it still fails, try opening it on another desktop installation (different version of LibreOffice/OpenOffice) to rule out a local setup issue.

OS-specific troubleshooting

What is a .SXI file?

.sxi is the OpenOffice.org 1.x Presentation format used by Impress (also used by StarOffice/OpenOffice.org). It is part of the OpenOffice.org XML family and is associated with the MIME type application/vnd.sun.xml.impress. In practice, you’ll encounter .sxi as older slide decks that are best opened and converted in modern office suites that still support the legacy format.

Background

The .sxi extension is most commonly associated with Impress presentations created by StarOffice and OpenOffice.org, especially in the OpenOffice.org 1.x era. It belongs to the OpenOffice.org XML file formats, which predate the later OpenDocument Format used by .odp.

Common MIME types: application/vnd.sun.xml.impress

Common .SXI issues

The .sxi file won’t open or opens as gibberish

This often happens when the file association is wrong, the file isn’t actually an Impress .sxi, or the file is damaged/incomplete.

Open it from inside LibreOffice Impress or Apache OpenOffice Impress (File → Open) instead of relying on double-click file associations.
Re-download or re-copy the file if it may have been truncated (especially if received by email or from a failing USB drive).
If it still fails, try opening it on another desktop installation (different version of LibreOffice/OpenOffice) to rule out a local setup issue.

Fonts/layout look different than expected

Legacy presentations can depend on fonts that aren’t installed on your system, causing text reflow and layout changes.

Install the missing fonts (if you know which ones were used) and reopen the presentation.
Export to PDF for consistent viewing when sharing with others.
After opening, convert to .odp and review slide-by-slide to fix any reflow issues.

Can’t open .sxi on phone/tablet

Mobile apps often prioritize newer formats and may not support the legacy .sxi format.

Convert the file on a desktop using LibreOffice Impress or Apache OpenOffice Impress to .odp or .pdf.
If editing is required, prefer converting to .odp; if viewing only, use .pdf.
Store the converted file in cloud storage so it’s easy to open on mobile.

FAQ

What is an .sxi file used for?

An .sxi file is typically a legacy StarOffice/OpenOffice.org Impress presentation (slide deck) from the OpenOffice.org 1.x era.

What programs can open an .sxi file today?

Common options include Apache OpenOffice Impress and LibreOffice Impress, which can open legacy OpenOffice.org/StarOffice Impress presentations.

What is the MIME type for .sxi?

A commonly associated MIME type is application/vnd.sun.xml.impress.

Can I convert .sxi to .odp or .ppt?

Yes—open the file in LibreOffice Impress or Apache OpenOffice Impress and use Save As/Export to create a newer format such as .odp (recommended for OpenDocument workflows) or another format you need.

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