Compare Two Excel Files Online and Find Changed Cells
Compare two Excel files online and quickly find changed cells, formulas, rows, columns and worksheets. FileDiffs compares XLSX workbooks directly in your browser, so your spreadsheet data stays on your device. No signup or software installation is required.
How to Compare Excel Files Online
Compare two Excel files in three simple steps:
- Add the original XLSX file to the left panel.
- Add the modified XLSX file to the right panel.
- Click Compare to review changed cells, formulas, rows and spreadsheet data side by side.
Tip: Keep worksheet names consistent between both workbooks so matching sheets can be compared more easily. FileDiffs works in modern browsers including Chrome, Edge, Firefox and Safari. You can review differences using Side-by-Side and Original/Modified views and export a comparison report when needed.
Why Excel Files Need Cell-by-Cell Comparison
Excel workbooks can contain multiple worksheets, formulas, values and large datasets, which makes manual comparison difficult. A small change in one cell or formula can be easy to miss when reviewing two spreadsheet versions by eye.
FileDiffs compares workbook data at the cell level, helping you identify changes in values, formulas, rows, columns and worksheets without manually checking every part of both Excel files.
Common Reasons to Compare Excel Workbooks
Finance teams, analysts, auditors and operations teams often compare workbook versions when even one changed value or formula can matter.
- Budgets — Review changes to forecasts, expenses, totals and assumptions.
- Financial models — Find formulas or values changed between model versions.
- Datasets — Check whether records, values or columns were updated.
- Price lists — Compare revised prices, discounts or product information.
- Reports — Review changes between monthly, quarterly or annual workbook versions.
- Payroll files — Identify changes to salaries, amounts, dates or employee data.
Comparing Excel workbooks helps you focus on changed spreadsheet data instead of manually checking hundreds or thousands of cells.
What Changes Can Excel Compare Detect?
FileDiffs compares data across matching worksheets and helps identify changes such as:
- Cell values — numbers, text, dates, or other values that changed
- Formulas — formulas edited or replaced between workbook versions
- Rows — added, deleted, or changed spreadsheet data
- Columns — changes to values or data across columns
- Worksheets — differences between matching workbook sheets
The comparison focuses on spreadsheet data so you can quickly identify important changes without manually checking every cell in both Excel files.
Examples of Excel Spreadsheet Differences
Here are a few examples of changes an Excel comparison can help identify:
- Formula change — =SUM(D2:D12) is replaced with 48500.
- Sales data — new rows are added to a monthly sales workbook.
- Discount update — 10% changes to 12% for selected products.
- Budget change — a forecast value changes from $125,000 to $138,500.
- Payroll update — a salary value changes from 52,000 to 57,000.
FileDiffs highlights these spreadsheet differences so you can quickly review changed values and formulas across workbook versions.
Compare Excel Workbooks Without Manual Cell Checking
Comparing large Excel workbooks manually can be difficult because important changes may be hidden among hundreds or thousands of cells. A single formula, amount, date, or value can change without being obvious when switching between two files.
FileDiffs compares XLSX workbook data directly in your browser and highlights spreadsheet differences side by side. This helps you review budgets, financial models, reports, price lists, datasets, and other workbook versions without manually checking every cell.
Your spreadsheet data is processed locally in your browser and stays on your device during the comparison.
Key Features of Excel File Comparison
- ✓Compare two Excel files online
- ✓Cell-by-cell XLSX comparison
- ✓Detect changed values and formulas
- ✓Compare rows, columns and worksheets
- ✓Side-by-side spreadsheet comparison
- ✓Drag and drop two XLSX files
- ✓Free side-by-side view with no account required
- ✓Original/Modified spreadsheet view
- ✓Export comparison report
- ✓Browser-based processing
- ✓Spreadsheet data stays on your device
Frequently Asked Questions About Excel File Comparison
Add the original XLSX workbook and the modified workbook, then click Compare. FileDiffs compares the available spreadsheet data and highlights changed cells, values and formulas side by side.
Yes. FileDiffs compares worksheets from two Excel workbooks so you can review differences in cells, values, formulas and other spreadsheet data between versions.
FileDiffs compares available formulas between workbook versions, helping you identify when a formula has been edited, replaced or changed to a different value.
No. FileDiffs processes the spreadsheet data locally in your browser, so your XLSX files stay on your device during the comparison.
Yes. FileDiffs can detect changes in numbers, amounts, percentages, dates, formulas and other spreadsheet values contained in the XLSX files.
Explore Other Comparison Tools
Excel Compare Tool Reviews
"Auditing values in Excel sheets is so much faster now. It highlights cell updates instantly."
"Saved hours of manual row checking in our Excel spreadsheets. No uploads required, 100% private."
"Handles large Excel data tables without lagging. The diff highlighting is clear and spot on."