CSV Compare

What is CSV Compare?

CSV Compare is a free, browser-based tool that helps you get the job done quickly. Row-level diff between two CSV files. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

Used by

• QA engineers
• Data analysts
• Backend developers
• Review teams

Recommended workflow

1. 1

   Prepare the input

   Use this tool as the focused step in a larger browser-based workflow.

2. 2

   Run CSV Compare

   Review the preview, copy or download the result, and keep everything local in your browser.

3. 3

   Next recommended tool

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4. 4

   Then continue with

   JSON Compare: Side-by-side diff of two JSON documents with structural alignment.

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5. 5

   Then continue with

   SQL Result Compare: Compare two query result sets.

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Frequently asked questions

How do I use CSV Compare?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Row-level diff between two CSV files.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is CSV Compare free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.