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Merge CSV Columns

Combine two or more columns of a CSV into a single new column, using the separator you choose (space, comma, hyphen, or a custom one), and decide whether to keep or remove the original columns. Everything is processed in your browser, with no file ever uploaded to a server.

How it works

  1. Paste your CSV with a header row into the input panel (or use the built-in example).
  2. Select the two or more columns you want to merge from the automatically detected list.
  3. Choose a preset separator or type a custom one, and set the name of the new column.
  4. Decide whether to keep or remove the original columns in the result.
  5. Copy the resulting CSV or download it as a .csv file.

Use cases

  • Combine first-name and last-name columns into a single full-name column.
  • Merge address fields (street, city, zip code) into one full-address column.
  • Create a combined identifier from several columns of an exported CSV.
  • Simplify a spreadsheet before importing it into a system that expects fewer columns.

Frequently asked questions