Compare two CSV or TSV files by one or more key columns and quickly find changed values, missing rows, added rows, and duplicate records. CDiff is a CSV compare tool and CSV diff utility for Windows. Unlike a standard text diff tool, it compares files as structured tabular data. This means records can be matched correctly even when the row order is different. Select one or more key columns to identify matching records. CDiff automatically sorts and compares the data, then highlights the differences so they are easy to review. Differences are easy to find: • Changed rows are highlighted in yellow • Changed cells are highlighted in pink • Rows found in only one file are clearly identified • Duplicate key records can be detected • Double-click a changed cell to view its details • Move directly to the previous or next difference • Search for records by key value Use it for: • Comparing data before and after system updates • Validating CSV files exported from business systems • Comparing master data and test results • Finding unexpected changes between two data files • Reviewing CSV or TSV files whose row order is different Key features: • Compare CSV and TSV files • Match records using one or more key columns • Detect changed values, missing rows, added rows, and duplicate records • Exclude selected columns from the comparison • Compare files with or without header rows • Display results side by side or in a top-and-bottom layout • Automatically detect file encoding • Drag and drop two files to start a comparison