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HomeXLS vs ODS
.xls
.ods

XLS vs ODS

Compare Microsoft Excel 97-2003 and OpenDocument Spreadsheet formats — understand the key differences and when to use each

Format Overview

XLS

Microsoft Excel 97-2003

Microsoft Excel 97-2003 (.xls) is a spreadsheet file format.

.xlsspreadsheet

ODS

OpenDocument Spreadsheet

OpenDocument Spreadsheet (.ods) is a spreadsheet file format.

.odsspreadsheet

XLS vs ODS: Feature Comparison

FeatureXLSODS
Full NameMicrosoft Excel 97-2003OpenDocument Spreadsheet
File Extension.xls.ods
Categoryspreadsheetspreadsheet
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use XLS vs ODS

Use XLS when you need:

  • •Files in Microsoft Excel 97-2003 format for maximum compatibility
  • •Industry-standard spreadsheet format support
  • •Wide software and platform compatibility

Use ODS when you need:

  • •Files in OpenDocument Spreadsheet format for specific workflows
  • •Optimized spreadsheet format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

XLS ODSODS XLS
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Learn More About These Formats

XLS Converter ODS Converter

Frequently Asked Questions

What is the difference between XLS and ODS?
XLS (Microsoft Excel 97-2003) and ODS (OpenDocument Spreadsheet) are both spreadsheet file formats. XLS files use the .xls extension while ODS uses .ods. They differ in compression, quality, compatibility, and intended use cases.
Can I convert XLS to ODS for free?
Yes! Convert999 lets you convert XLS to ODS completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, XLS or ODS?
It depends on your use case. XLS (Microsoft Excel 97-2003) may be better for certain workflows, while ODS (OpenDocument Spreadsheet) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

XLS Converter

Convert from XLS

ODS Converter

Convert from ODS

File Tools

Compress, resize, merge

Convert to XLS

All sources → XLS

Convert to ODS

All sources → ODS

Format Statistics

Trends & data 2025

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