How to Compare Excel Files Online (XLSX, XLS, and CSV)

Apr 4, 2026

If you searched for "diffcheck between 2 excel files", you probably want a quick way to check two spreadsheet revisions. Comparison Text accepts XLSX, XLS, and CSV files, reads worksheet values in workbook order, and then highlights their character changes.

A better Excel comparison flow

  1. Save both files as .xlsx, .xls, or .csv.
  2. Upload the original and revised versions.
  3. Review extracted worksheet values, summary stats, and highlighted changes.
  4. Export the completed comparison as a local text report when you need a record.

When this works well

  • Comparing recurring report exports.
  • Checking pricing table updates.
  • Reviewing CSV snapshots from internal tools.

What the result means

The tool includes every worksheet and labels each one by name. It compares extracted values as text, so it is useful for finding content changes. It does not identify a moved row as the same record, and it does not compare formulas, formatting, or cell addresses. Review important spreadsheet changes in the original files before relying on the result.

Browser safety limits

Each file can be up to 8 MB. A workbook can include up to 20 worksheets, 50,000 non-empty cells, and 200,000 extracted characters, with up to 10,000 rows and 128 columns per worksheet. XLSX archives must also stay within safe compressed expansion limits. If a workbook exceeds a limit, export only the ranges you need as smaller CSV files and compare those instead.

Open Excel Compare to compare two supported spreadsheet files in the browser. For document revisions, use Word Compare. If your data is structured markup rather than a spreadsheet, use XML Compare.

Comparison Text

Comparison Text