How are rows matched for comparison?

Rows are matched by their position (index). The first row of CSV A is compared with the first row of CSV B, and so on. If one CSV has more rows, the extra rows are shown as entirely added or removed.

Does it handle quoted fields with commas?

Yes. The parser correctly handles RFC 4180 quoted fields, so fields containing commas, newlines, or quote characters are parsed properly as long as they are enclosed in double quotes.

Can I use a different delimiter?

The tool auto-detects the delimiter by checking for tabs, semicolons, and commas in the first line. You can also override it using the delimiter selector above the inputs.

CSV Diff

Compare two CSV files row by row and highlight added, removed, and changed cells.

Delimiter:

$CSV A (original)

lines

0 chars1 lines

$CSV B (changed)

lines

0 chars1 lines

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FAQ

How are rows matched for comparison?: Rows are matched by their position (index). The first row of CSV A is compared with the first row of CSV B, and so on. If one CSV has more rows, the extra rows are shown as entirely added or removed.
Does it handle quoted fields with commas?: Yes. The parser correctly handles RFC 4180 quoted fields, so fields containing commas, newlines, or quote characters are parsed properly as long as they are enclosed in double quotes.
Can I use a different delimiter?: The tool auto-detects the delimiter by checking for tabs, semicolons, and commas in the first line. You can also override it using the delimiter selector above the inputs.

CSV Diff parses two CSV inputs, aligns their rows, and produces a color-coded table showing exactly what changed. Added rows are highlighted in green, removed rows in red, and cells with changed values in yellow. Useful for auditing data exports, comparing database snapshots, or reviewing spreadsheet changes. All processing happens in your browser.