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CSV Column Mapper

Rename CSV headers and replace exact cell values with an explicit mapping.

Choose your file

Private by designProcessed locally · Originals unchanged

Column mapping & output options

Open to match the mapping to your file. Current example uses status.

Choose local input and settings.

Preview & downloads

Your result will appear here

Choose a file, adjust the settings and select Map Columns.
How to use, limits & privacy
Choose a CSV/TSV with unique headers. Edit the settings array: column is an existing exact header, rename is optional, values maps exact case-sensitive cell text to new text. Unmapped values remain unchanged. No columns are selected, removed or reordered. The example requires a status column; adapt it to your file. Formula protection prefixes risky output cells by default.
Text: UTF-8 only, 4 MiB; CSV: 50,000 data records, 200 columns, 500,000 cells; exports: 16 MiB.
Inputs are never uploaded. Results are rendered as text or a locally generated image. Original files remain unchanged. Changing input invalidates previous results.