CSV Diff Tool
Compare two CSV files by a key column and show added, removed, and changed rows with export-ready diff output. Free CSV comparison tool by Graph Tools.
Use this free CSV diff tool to compare two CSV files row by row using a key column. Paste or upload both files, specify the key column, and instantly see added rows, removed rows, and changed values per row with highlighted differences. Export the diff as a CSV for downstream reporting. Useful for data engineers validating ETL output, analysts comparing dataset versions, and QA engineers checking data migration accuracy.