Column Mapping Helper Learn more

Upload two files, auto-suggest column matches, and generate a renamed copy so exports line up. Runs locally in your browser.

Upload A (source)

CSV / TSV / Excel (XLSX/XLS)

File:not loaded

Delimiter Header row

Upload B (target)

CSV / TSV / Excel (XLSX/XLS)

File:not loaded

Delimiter Header row

Actions

Generate suggestions, then download a renamed copy of File A (header renamed to match File B).

Waiting for files

Tip: If a match looks wrong, change it in the dropdown before downloading.

Suggested mappings

One row per source column. Score is a rough similarity (higher is better).

A cols:— B cols:—

Source (A)	Suggested target (B)	Score	Decision

How to read results

High score usually means the headers match once you ignore casing, underscores, and spacing.

Medium score is a “reasonable guess” — verify quickly.

No match means nothing in B looked similar; pick a target or choose “(leave as-is)”.

Column Mapping Helper