What is a XLR file?
An .XLR file is a Works Spreadsheet created by Microsoft Works. These files store tabular data in rows and columns. They are similar to standard spreadsheets but use an older internal structure. The .XLR format stores data using the underlying DOC file structure.
How to open XLR files?
Historically, users opened .XLR files using Microsoft Works. Because Microsoft discontinued this software, you need modern alternatives. Modern versions of Microsoft Excel can open many .XLR files directly. Open-source programs like LibreOffice Calc and Apache OpenOffice also support this legacy format.
Best practices and troubleshooting
Sometimes, renaming the file extension from .XLR to .XLS helps older spreadsheet software recognize the file. However, this does not change the internal data format. If desktop software fails to read the spreadsheet, an online inspection tool is the safest approach.
Software and tools
You can use LibreOffice Calc or Microsoft Excel to view and convert these files. For batch processing, command-line tools like Gnumeric can read and export legacy spreadsheet formats.
Summary
viewer.online/xlr analyzes .XLR files to identify their exact format and creator software, shows which programs can open the file, and usually previews it. Because .XLR files use the known DOC format, viewer.online/xlr can safely open and display them online, eliminating compatibility problems.