CSV to Excel
Convert a CSV file to Excel (.xlsx) in your browser. Download a real spreadsheet — nothing is uploaded.
Compare Excel files
Compare two Excel workbooks by full row on each file’s first sheet — only in A, only in B, or both.
File A
Drop file A or click to choose
Compared locally
File B
Drop file B here or click to choose
Nothing is uploaded
How to use Compare Excel files
Compare two Excel workbooks using each file’s first sheet. See counts for rows only in A, only in B, or in both — not a cell-by-cell diff.
Everything runs locally in your browser — your files are never uploaded to a server.
Compare Excel files FAQs
How do I compare two Excel files?
Drop two workbooks to count rows only in A, only in B, or in both, using each file’s first sheet. Matching runs in your browser.
Is comparing Excel files free?
Yes. Every Excel and CSV tool on ReallyUseful.Tools is free to use, with no account or subscription required.
Are my files uploaded?
No. Files are processed in your browser on this device. Nothing is uploaded to our servers.
Does it show cell-level changes?
No. It compares whole rows as sets on the first sheet of each workbook, not a cell-by-cell spreadsheet diff.
More Excel/CSV
Excel to CSV
Convert Excel .xlsx or .xls to CSV in your browser. Choose a sheet and delimiter, then download.
CSV viewer
Open and browse a CSV in a paginated table in your browser. No upload — view large files locally.
Merge CSV files
Combine multiple CSV files into one in your browser. Rows are stacked and headers aligned by name.
CSV to XML
Convert CSV rows into structured XML in your browser. Each row becomes an element — nothing is uploaded.