.SXC file extension

To open .SXC files on Windows, install LibreOffice (Calc) or Apache OpenOffice (Calc).

To open a .SXC file, use a spreadsheet application that supports OpenOffice.org 1.x formats—most commonly LibreOffice Calc or Apache OpenOffice Calc. Don’t rename the extension; open it from within the app or use “Open with”.

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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 .SXC files

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

Windows

Install LibreOffice (Calc) or Apache OpenOffice (Calc).
In the app, go to File > Open and select the .SXC file (or right-click the file > Open with > choose the installed suite).
If it opens, immediately save a copy to a newer format you and your recipients regularly use.

Full Windows guide

Mac

Install LibreOffice (Calc) or Apache OpenOffice (Calc).
Open the spreadsheet app, then use File > Open to select the .SXC file (or Control-click > Open With).
If you plan to edit and re-share it, save/export to a more current spreadsheet format after opening.

Full Mac guide

Linux

Install LibreOffice (Calc) or Apache OpenOffice (Calc) from your distribution’s package manager.
Open the app and use File > Open (or right-click the .SXC file in your file manager > Open With > select LibreOffice Calc/OpenOffice Calc).
If your desktop mis-identifies the file type, open it from within Calc using File > Open.

Full Linux guide

iOS

iOS typically won’t open .SXC reliably in built-in viewers; transfer the file to a desktop and open it with LibreOffice Calc or Apache OpenOffice Calc.

Full iOS guide

Android

Android support for .SXC is not commonly reliable; for best results, move the file to a desktop system and open it with LibreOffice Calc or Apache OpenOffice Calc.

Full Android guide

Security notes

.SXC is a spreadsheet format; treat it like any document from an untrusted source—malicious content may target application parsing or spreadsheet features.
Open .SXC files in LibreOffice Calc or Apache OpenOffice Calc and avoid enabling any optional active features unless you trust the sender and understand the impact.
If the file was obtained from the internet or email, keep a backup copy before opening or converting so you can recover if the file triggers crashes or renders incorrectly.

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 .SXC files fail to open.

Common reasons

The .SXC file opens as garbled text or in the wrong app
Error when opening or “file is corrupted” message
Layout, formulas, or formatting look different after opening

Fix steps

Open LibreOffice Calc or Apache OpenOffice Calc first, then use File > Open to select the .SXC file.
On Windows/macOS/Linux, set the default app for .SXC to your spreadsheet suite via “Open with” / “Get Info” / file properties.

OS-specific troubleshooting

What is a .SXC file?

.SXC is the OpenOffice.org XML spreadsheet format used by OpenOffice.org Calc (commonly referenced as an OpenOffice.org 1.x format). It is associated with the MIME type application/vnd.sun.xml.calc. Modern office suites may still open it for compatibility, but it is considered an older format compared to newer OpenDocument spreadsheets.

Background

.SXC belongs to the OpenOffice.org XML family of file formats used by OpenOffice.org (including Calc spreadsheets). It was used to store spreadsheet data and related document information in an XML-based structure as defined by the OpenOffice.org XML specifications.

In practice, you’ll most often encounter .SXC files when working with older OpenOffice.org documents or archives from earlier office deployments. LibreOffice documentation explicitly lists .sxc as a supported legacy spreadsheet format that Calc can open.

On Linux desktops, file type identification commonly relies on shared-mime-info definitions, which include application/vnd.sun.xml.calc for this type of document. If you need to share the file with others, consider opening it in a compatible desktop suite and saving to a more widely used spreadsheet format supported by your workflow.

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

Common .SXC issues

The .SXC file opens as garbled text or in the wrong app

The file association may be incorrect, or the system may treat it as a generic XML/text file instead of a Calc spreadsheet.

Open LibreOffice Calc or Apache OpenOffice Calc first, then use File > Open to select the .SXC file.
On Windows/macOS/Linux, set the default app for .SXC to your spreadsheet suite via “Open with” / “Get Info” / file properties.

Error when opening or “file is corrupted” message

The file may be incomplete (bad download/copy), or it may not actually be an SXC spreadsheet despite the extension.

Re-download or re-copy the file from the original source (avoid email clients that may alter attachments).
Try opening the file with both LibreOffice Calc and Apache OpenOffice Calc to rule out a single-app compatibility issue.

Layout, formulas, or formatting look different after opening

Because .SXC is a legacy format, modern suites may import it with minor differences in formatting or formula handling.

Check key sheets, formulas, and charts after opening, especially if accuracy is critical.
If you need stable long-term editing, save a copy to a newer format from within the spreadsheet app and work from that copy.

FAQ

What does .SXC stand for?

It is the OpenOffice.org Calc spreadsheet format in the OpenOffice.org XML family (a legacy OpenOffice.org 1.x spreadsheet format).

What program opens .SXC files?

LibreOffice Calc can open OpenOffice.org 1.x spreadsheet formats including .sxc, and Apache OpenOffice Calc is also associated with this format.

Is .SXC the same as OpenDocument .ODS?

No. .SXC is an older OpenOffice.org XML spreadsheet format, while .ODS is the newer OpenDocument Spreadsheet format. Many users convert .SXC by opening it in a compatible suite and saving to a newer format.

What is the MIME type for .SXC?

application/vnd.sun.xml.calc.

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