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Diff CSV

Compare two CSVs by key columns. See added, removed, and changed rows.

Key columns

Drop a file or click to browse

or paste data below

Drop a file or click to browse

or paste data below

How to use Diff CSV

Compare two CSVs by key: added, removed, and changed rows. Follow these steps to get a reliable result in seconds.

  1. 1

    Paste left (old) and right (new) CSVs.

  2. 2

    Select key column(s) used to match rows.

  3. 3

    Review added, removed, and changed counts.

  4. 4

    Export a diff CSV for further analysis.

Why RividTech?

A simple, private toolkit for everyday structured-data tasks — without signing up or sending files to the cloud.

Private by design

Your files are processed in your browser. RividTech does not upload your CSV, TSV, or JSON content to our servers for conversion.

Fast and free

No account, no install, and no wait for server round-trips. Tools run instantly on your device.

Built for real workflows

Convert formats, generate SQL, preview tables, remove duplicates, and filter data — then copy or download when you are done.

Works anywhere

Use the tools on desktop or laptop with a modern browser. Ideal for quick one-off tasks and everyday data cleanup.

More clean & transform

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