Sheet Comparison Tool

Compare data cell-by-cell between two Excel/CSV files to detect differences.

1. Upload Files

Upload File 1 (.xlsx, .csv)

Waiting for File 1...

Upload File 2 (.xlsx, .csv)

Waiting for File 2...

2. Select Sheets & Context

Context Column (from File 1):

File 1 Mapping Select Sheet: Start Comparison From Col:

File 2 Mapping Select Sheet: Start Comparison From Col:

Comparison Results

Upload files and map columns to see differences here.

Note: This is a static web page that runs locally in your browser — no data is sent to any server. If preferred, you can also download it as an HTML file and run it offline or clone from Web-Tools (MIT License).