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CSV Comparison Tool

Process spreadsheet data with this csv comparison tool entirely in your browser.

Your files stay in this browser. Each input file can be up to 4 MB and is held only in local memory.

How to use this calculator

  1. Load a local file or paste CSV text, adjust the available options, and review the result before downloading it.
  2. Review the live result and use Copy result when you need to share it.

How the calculation works

The browser parses the file in local memory. CSV fields preserve quoted commas, escaped quotation marks, and line breaks; files are not uploaded.

Processing rules

The browser parses the file in local memory. CSV fields preserve quoted commas, escaped quotation marks, and line breaks; files are not uploaded.

Step-by-step calculation

  1. Load a local file or paste CSV text, adjust the available options, and review the result before downloading it.
  2. The browser parses the file in local memory. CSV fields preserve quoted commas, escaped quotation marks, and line breaks; files are not uploaded.
  3. Check the displayed result, then copy it if needed.

Worked example

Two exports are compared as complete records, with matching, added, and removed rows reported separately.

Risk guidance

Frequently asked questions

Does this tool send my inputs anywhere?

No. The interactive calculation runs in your browser and this site does not submit tool inputs to a backend.

How should I use the result?

Check that the entered units and values match your situation, especially around dates, breaks, and rounding.

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