ExcelCompare

What is ExcelCompare?

A free browser tool that compares two Excel files side-by-side and highlights cell-level differences instantly. Files are processed locally in your browser so nothing is uploaded or stored. It supports common spreadsheet formats (XLSX, XLS, XLSM, XLSB, CSV), handles large sheets, realigns inserted or deleted rows, and uses synchronized scrolling plus color-coded highlights to make visual comparison fast and intuitive. No installation or account required — just drag and drop your files and start spotting changes.

Key features

• Processes files locally in your browser to keep data private.
• Supports XLSX, XLS, XLSM, XLSB and CSV spreadsheet formats natively.
• Shows files side-by-side with synchronized scrolling for easy comparison.
• Automatically highlights edits, additions, and deletions with color coding.
• Realigns rows intelligently when data is inserted or removed.
• No installation or account required; quick, free, browser-based tool.