# csv-diff > View differences between two CSV, TSV or JSON files. > More information: . - Display a human-readable summary of differences between files using a specific column as a unique identifier: `csv-diff {{path/to/file1.csv}} {{path/to/file2.csv}} --key={{column_name}}` - Display a human-readable summary of differences between files that includes unchanged values in rows with at least one change: `csv-diff {{path/to/file1.csv}} {{path/to/file2.csv}} --key={{column_name}} --show-unchanged` - Display a summary of differences between files in JSON format using a specific column as a unique identifier: `csv-diff {{path/to/file1.csv}} {{path/to/file2.csv}} --key={{column_name}} --json`