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Diff Checker — CSV

Compare CSV, Excel, or Google Sheet data. Ignore specific columns. Fast, free, open source, ad-free.

Drop a file here or click to browse
CSV, XLSX, XLS supported
Drop a file here or click to browse
CSV, XLSX, XLS supported

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Use this CSV diff checker to compare two spreadsheets or CSV exports and see exactly which rows and cells changed. Upload files directly or paste CSV text. Made with 💜.

How to Use the CSV Diff Checker

Upload or paste your original and modified CSV data, optionally mark the first row as a header, then select any columns to ignore before clicking Compare.

Supported Formats

Supports CSV files, Excel files (.xlsx, .xls), and plain CSV text pasted directly. Export from Google Sheets as CSV and paste or upload here.

Ignoring Columns

Click any column name in the "Ignore columns" panel to exclude it from the comparison. Ignored columns are still shown in the diff table but are grayed out.

Reading the Results

Red cells show values that were removed or changed in the original; green cells show the new or added values. Fully added or removed rows are highlighted row-wide.