Find the difference between two Excel files, CSV, ODS, and other spreadsheets. Upload your files and instantly see every change, addition, and removal.
Supported formats: .xlsx, .xls, .xlsm, .xlsb, .csv, .txt, .dif, .ods
An Excel file comparison tool (or spreadsheet diff checker) lets you compare two Excel files or other spreadsheet formats side by side to find every difference between them. It identifies which cells have been changed, which rows have been added or removed, and highlights the exact modifications — saving hours of manual review.
Using our free Excel comparison tool is straightforward:
Our tool supports all major spreadsheet and data file formats:
| Format | Extension | Description |
|---|---|---|
| Excel Workbook | .xlsx | Modern Excel format (Office 2007+) |
| Excel 97-2003 | .xls | Legacy Excel binary format |
| Excel Macro-Enabled | .xlsm | Excel with macros |
| Excel Binary | .xlsb | Binary Excel workbook (faster for large files) |
| CSV | .csv | Comma-separated values |
| Text | .txt | Tab-delimited text files |
| DIF | .dif | Data Interchange Format |
| OpenDocument | .ods | LibreOffice / OpenOffice spreadsheets |
Compare monthly or quarterly financial reports to spot discrepancies in revenue, expenses, and budget allocations. Auditors use spreadsheet comparison to verify data integrity between report versions, ensuring no unauthorized changes were made to financial records.
When migrating data between systems, compare the source and destination Excel files to verify that all records transferred correctly. Instantly identify missing rows, altered values, or formatting issues that could impact downstream processes.
Track changes between different versions of pricing sheets, inventory lists, project plans, or employee rosters. Instead of manually scanning hundreds of rows, our tool highlights every modification at a glance.
QA teams compare expected vs. actual output data exported from applications. Upload both files and immediately see where test results diverge from expected values — speeding up bug identification and regression testing.
Researchers compare datasets across experiment iterations or survey rounds. Quickly identify which data points changed, were added, or were removed between collection periods.
Our Excel comparison tool works in several steps:
Upload your original Excel file on the left panel and the changed file on the right panel (drag & drop or use the upload button), then click "Find Differences." The tool will parse both files and display a color-coded comparison showing every change, addition, and removal.
You can compare Excel files (.xlsx, .xls, .xlsm, .xlsb), CSV files (.csv), text files (.txt), DIF files (.dif), and OpenDocument spreadsheets (.ods). You can even compare files of different formats — for example, an .xlsx against a .csv.
Yes, completely. All file processing happens entirely in your browser using JavaScript. Your spreadsheet data is never uploaded to any server, never stored, and never shared. Your files stay on your device at all times.
Yes. When you upload a workbook with multiple sheets, tabs appear below the preview letting you select which sheet to view and compare. You can switch sheets independently for each file.
The tool detects three types of differences: changed cells (same row, different values — highlighted in yellow), added rows (rows only in the changed file — highlighted in green), and removed rows (rows only in the original file — highlighted in red).
Yes. CSV is one of the supported formats. Simply upload your two CSV files and click "Find Differences." The tool will parse and compare them just like Excel files.
There is no hard limit. Since all processing happens in your browser, the practical limit depends on your device's memory. Files with up to 100,000 rows work well on modern devices.
You can copy the diff results to your clipboard using the "Copy Diff" button. You can also download individual file data as CSV using the download button on each panel.
No. The tool runs entirely in your web browser. No plugins, extensions, or desktop software required.
Yes. The tool is fully responsive. On mobile devices the upload panels stack vertically, and all features including drag-and-drop, preview, and comparison work on phones and tablets.
Yes. You can compare any combination of supported formats. For example, compare an .xlsx file against a .csv or an .ods file against an .xls — the tool normalizes both to a table grid before comparison.