Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.STC
File Type
OpenOffice.org XML Spreadsheet Template
Category
Data
Best first step
Use compatible software
Quick Summary
A practical overview of the .stc file format
The STC file extension is primarily associated with spreadsheet templates created by older versions of Apache OpenOffice Calc and StarOffice Calc, which were originally developed by Sun Microsystems. This format uses XML-based formatting to store spreadsheet layouts, formulas, styles, and formattin…
File extension
.STC
File type
OpenOffice.org XML Spreadsheet Template
Category
Data
Recommended action
Open with a trusted compatible app
How to open a .stc file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .stc.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .stc file?
File extension details and usage information
The STC file extension is primarily associated with spreadsheet templates created by older versions of Apache OpenOffice Calc and StarOffice Calc, which were originally developed by Sun Microsystems. This format uses XML-based formatting to store spreadsheet layouts, formulas, styles, and formatting settings, allowing users to quickly generate new spreadsheet documents with a pre-defined structure. It served as the default template format before the widespread adoption of the OpenDocument Format (ODF) standard, which subsequently introduced the .ots extension for spreadsheet templates. While considered a legacy format today, STC files can still be opened and converted by modern open-source office suites like LibreOffice and Apache OpenOffice to ensure backward compatibility for legacy business and financial documents.
Software Compatibility
Programs that may open or work with .stc files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .stc files be converted?
Options for saving or exporting this file to another format
In many cases, a .stc file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .stc file.
Why can't I open a .stc file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .stc format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .stc files
To open a .stc file, use software that supports this file format.
- Apache OpenOffice
- LibreOffice
- PlanMaker
- Collabora Office
- AndrOpen Office
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .stc file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.