What is an OTS file?
The .OTS file extension primarily stands for OpenDocument Spreadsheet Template. These files use a standardized .ZIP-based format developed by OASIS. They store the structure, formatting, and mathematical formulas for a spreadsheet. Users rely on them to create multiple new spreadsheets with the exact same layout. However, .OTS files can also be Timestamp proof files from OpenTimestamps, Online poker tournament summaries in JSON format from the Winning Poker Network, or OtsAV Album Files by Ots Labs.
How to open OTS files?
Because an .OTS file can represent several completely different formats, we highly recommend using viewer.online/ots. This platform analyzes .OTS files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. If you know you have an OpenDocument Spreadsheet Template, you can open it with standard office suites. For timestamp files, you need specialized command-line tools.
Software and tools
To work with .OTS spreadsheet templates locally, you can use LibreOffice Calc, Apache OpenOffice Calc, or Microsoft Excel. For timestamp verification, the command-line tool from OpenTimestamps is required. Poker data is usually processed by statistical tracking tools like Holdem Manager 3.
Best practices and troubleshooting
If your computer fails to open the file, first confirm its internal structure. You can rename a copy of an OpenDocument Spreadsheet Template from .OTS to .ZIP to manually inspect its internal XML components. If you need to edit the file in older software or share it broadly, we recommend file conversion to sensible target formats on convert.guru. You can quickly convert an .OTS file to .XLSX, .CSV, or a standard .ODS file.
Summary
In summary, viewer.online/ots directly opens and previews .OTS files in the browser, eliminating the need to install software or troubleshoot compatibility issues.