Question 1

How do I compare two Excel files?

Accepted Answer

Upload your original file (File A) and the changed file (File B) to ChangeCheck. The tool automatically detects the key column and shows you exactly which rows were added, removed, or changed. You can then export the differences to Excel.

Question 2

Is my data safe when comparing Excel files online?

Accepted Answer

Yes, ChangeCheck processes all files directly in your browser. Your files are never uploaded to any server. This makes it safe for sensitive data like employee lists, financial reports, and personal information.

Question 3

What file formats does ChangeCheck support?

Accepted Answer

ChangeCheck supports Excel files (.xlsx, .xls) and CSV files. It can handle files with up to 5,000 rows and 50 columns. Multi-sheet workbooks are supported - you can select which sheet to compare.

Question 4

Can I compare employee lists or payroll files?

Accepted Answer

Yes, ChangeCheck is ideal for comparing employee lists, personnel records, and payroll files. It automatically detects employee IDs or other unique identifiers and shows you who joined, who left, and what data changed.

Question 5

How does ChangeCheck detect what changed?

Accepted Answer

ChangeCheck identifies a key column (like ID, invoice number, or employee ID) to match rows between files. It then compares each cell and highlights differences. You can also manually select the key column or use row position matching.

Assemble spreadsheets into one file.