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CSV Column Mapper

Paste a CSV header row or small sample, enter renamed headers and generate a clean mapping locally.

✓ Tool inputs are processed in your browser✓ No account
Map and rename CSV headers locally.

When to use this tool

Use it when you need a quick header mapping before importing, cleaning or documenting CSV data.

  1. Rename spreadsheet columns before an import.
  2. Create a JSON mapping object for a data cleanup script.
  3. Compare original and mapped headers before sharing a CSV template.
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FAQ

Questions

Questions

Does the CSV column mapper upload my data?

No. Header parsing and mapping run entirely in your browser.

Can I paste a full CSV sample?

Yes. The tool uses the first row as headers and ignores later rows for mapping.

What mapping output does it create?

It returns original headers, mapped headers, a clean header row and a JSON mapping object.