Compare CSV and XLS files to find differences, duplicates, and changes. Free online tool for spreadsheet comparison.
CSV (Comma-Separated Values) is a universal plain-text format that stores tabular data with values separated by commas. It's highly portable and compatible with virtually all spreadsheet applications.
XLS is the legacy Excel binary format used before 2007. While older, it remains widely used for compatibility with older systems and Excel versions.
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