- Upload your original Excel file in the "Original File" field
- Upload the modified Excel file in the "Modified File" field
- Click "Compare Files" to analyze differences
- Review the side-by-side comparison showing added, removed, and modified cells
- Export the differences to Excel with color-coded highlighting
Compare Excel Files
Find differences between two Excel files with side-by-side comparison
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Contact SupportHow to Use Compare Excel Files
Frequently Asked Questions
Supports XLSX, XLS, and CSV files up to 10MB each. The tool compares the active sheet of both files.
The tool compares cells position-by-position and shows calculated values (not formulas). Differences are categorized as Added (new values), Removed (deleted values), or Modified (changed values).
Yes! All processing happens in your browser. Your files are never uploaded to our servers.
What does this tool do?
This tool compares two Excel files and highlights the differences between them: added rows, removed rows, and changed cells. It offers a quick whole-sheet comparison and an advanced mode with column mapping. Runs in your browser.
How to use Compare Excel Files - Free Online Tool
- Upload the first Excel file (the original).
- Upload the second Excel file (the changed version).
- Choose quick comparison, or advanced with column mapping and key columns.
- Click Compare to see added, removed, and changed cells.
- Download the difference report.
Example
Comparing last month vs this month:
Before
| ID | Price |
| A1 | 100 |
| A2 | 200 |
After
| ID | Price |
| A1 | 120 |
| A3 | 300 |
A1 price changed, A2 was removed, A3 was added.
Excel formula alternative
Prefer a formula? You can achieve a similar result with Inquire add-in:
Inquire > Compare Files (Excel Professional Plus only)Excel's Inquire add-in compares workbooks but ships only in certain editions. This tool works in any browser with no add-in.
When should I use this tool?
Tracking changes between file versions
Auditing edits made by another person
Reconciling two data exports
Comparing price lists over time
Verifying data before and after an import
Spotting unauthorized changes
Frequently Asked Questions
No. Both files are compared inside your browser, so sensitive data never leaves your device.
Quick mode compares sheets cell-by-cell in place. Advanced mode lets you map columns and choose key columns to match rows even when their order differs.
Yes. You can export a difference report highlighting added, removed, and changed data.
In quick mode yes; in advanced mode you can define key columns so rows are matched by identity rather than position.