Is DiffSheets free to use?

Yes, DiffSheets is completely free to use. There are no hidden fees, subscriptions, or premium features locked behind a paywall.

Is my data safe when using DiffSheets?

Absolutely. DiffSheets processes all files 100% client-side in your browser. Your spreadsheet data never leaves your computer or gets uploaded to any server.

What file formats does DiffSheets support?

DiffSheets supports Excel files (.xlsx, .xls), CSV files, and OpenDocument Spreadsheets (.ods). You can compare files of the same or different formats.

Can I compare large Excel files?

Yes, DiffSheets uses virtual scrolling technology to efficiently handle large spreadsheets with thousands of rows without performance issues.

How does DiffSheets compare spreadsheets?

DiffSheets offers multiple comparison modes: position-based matching (row by row), key column matching (by a unique identifier), and intelligent LCS algorithm for best alignment detection.

Legacy Excel Format

Compare XLS Files Online

Need to compare legacy Excel files? Our free tool handles .xls files perfectly. Privacy guaranteed.

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Benefits

Why Use DiffSheets for XLS Comparison?

Legacy Format Support

Full support for older .xls format files from Excel 97-2003.

Cross-Version Compatibility

Compare .xls files with modern .xlsx formats seamlessly.

Complete Privacy

Your XLS files never leave your computer. All processing happens locally in your browser.

Instant Results

No waiting for server processing. Compare files in milliseconds.

Use Cases

Perfect For

Legacy System Migration

Verify data integrity when migrating from legacy Excel systems to modern platforms.

Historical Data Comparison

Compare old archived files with current data to track long-term changes.

Compliance Auditing

Audit historical records and ensure compliance with legacy document requirements.

Archive Verification

Verify that archived .xls files match their original versions for record-keeping.

Ready to compare?

Need to compare legacy Excel files? Our free tool handles .xls files perfectly. Privacy guaranteed.

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