Excel file diff tool for comparing raw CSV and XLSX exports
You have two Excel exports open and need to find differences quickly. This excel file diff tool reads raw CSV and XLSX files, handling encoding and structure automatically.
Compare and clean raw Excel and CSV files regardless of encoding or structure without manual prep.
Drop your file in and ask a question — no account needed.
Upload your spreadsheet.xlsx .xls .csv — free to try, no accountWhat this export contains
| Date |
| Transaction ID |
| Amount |
| Customer Name |
| Product Code |
| Quantity |
| Status |
| Region |
| Notes |
What usually goes wrong with it
Mixed file encodings cause garbled text
Exports can be UTF-8, ANSI, or other encodings, causing unreadable characters if not handled correctly.
DataMimi DataMimi auto-detects and converts file encodings (UTF-8, ANSI) on upload to prevent garbled text.
Headers not always on first row
Some reports include merged title rows or metadata above the header, which breaks automatic column recognition.
DataMimi It scans initial rows to find the actual header row, handling merged titles or metadata above.
Numbers stored as text
Amounts and quantities often import as text, preventing numeric comparisons or calculations.
DataMimi Numbers stored as text are recognized and converted to numeric types for accurate comparison.
Extra subtotal or total rows
Some exports include subtotal rows that should be excluded from difference checks.
DataMimi Subtotal and total rows are identified by pattern and can be excluded from diff results.
Inconsistent column order or presence
Files from different systems may reorder columns or omit some, complicating direct row-by-row comparison.
DataMimi Columns are matched by header name, not position, allowing comparison despite order changes or missing columns.
Common questions
What is an excel file diff tool?
An excel file diff tool compares two Excel or CSV files to show differences in rows, columns, and values.
Does DataMimi handle files with different text encodings?
Yes, it automatically detects and converts UTF-8, ANSI, and other encodings on upload.
Can it detect and skip subtotal or total rows?
DataMimi identifies subtotal rows based on common patterns and lets you exclude them from comparisons.
How does it handle files with headers not on the first row?
It scans the first few rows to locate the header row automatically without user intervention.
Can I compare files with columns in different orders?
Yes, DataMimi matches columns by name, not position, allowing accurate comparison despite column rearrangement.
Try it with your own file
DataMimi reads the file you actually have — merged cells, headers below row one, totals pasted at the bottom — and shows which rows and columns every number came from.
Ask about your file