Data Comparison Tool
Upload two CSV or Excel files and instantly see what changed — added rows, removed rows, and field-level differences. No registration required. All processing happens in your browser.
Upload both files below to start the comparison. Supports .xlsx, .xls, and .csv.
File A (Original)
Supports .xlsx, .xls, .csv, and .json — up to 50MB per file. Multiple files supported.
File B (Updated)
Supports .xlsx, .xls, .csv, and .json — up to 50MB per file. Multiple files supported.
How It Works
Upload Two Files
Upload your original file as File A and the updated version as File B. Supports .xlsx, .xls, and .csv.
Choose a Key Column
Select the column that uniquely identifies each row (like an ID or email). Rows are matched across files by this value.
Review & Export
See exactly which rows were added, removed, or changed — with field-level highlighting. Export the diff as a CSV.