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CSV Diff

Compare two CSV tables row-by-row.

Added (1)

  • + Dana, 30

Removed (1)

  • - Charlie, 42

Changed (1)

  • ~ key: Ada
    - Ada, 28
    + Ada, 29

Compares two CSV tables using the first column as a key. Detects added, removed, and changed rows. Useful for diffing exported data over time, comparing inventory snapshots, or spotting unexpected changes in a large list.

About

Paste two CSVs (with headers). The tool keys on the first column and finds added rows, removed rows, and rows where any cell changed. Shows before/after for changes.

How to use

  1. Paste two CSV tables.
  2. Read the additions, removals, and changes.

FAQ

What if my key isn't in the first column?+

Reorder your CSV so the key is first. The diff is keyed on column 1.