Data Comparison (CSV and JSON Diff)

Compare two CSV, JSON, Excel or Parquet files by a key column and see added, removed and changed rows. Runs in your browser.

Example

before.csv + after.csv, key = id

Added 3 · Removed 2 · Changed 5

Frequently asked questions

Can the files be different formats?

Yes. A can be a CSV and B an Excel or JSON file. Columns are matched by name.