CSV merger

Combine two CSV tables, aligning columns by their headings.

Processed on your device

Input

Open a local UTF-8 text file25 MiB maximum. The file opens in the text box above.Or drop a file here.
Open a second UTF-8 text file25 MiB maximum. The file opens in the second text box.Or drop a file here.

How to use this tool

  1. Paste two tables with unique column headings.
  2. Columns are aligned by their exact header names, regardless of order.
  3. Columns present in only one table are retained with empty cells for the other table.

Things to know

  • Processing happens on your device. Check the result before replacing your original data.
  • Each CSV input accepts up to 25 MiB, 100,000 data rows, 10,000 columns and 1,000,000 cells. Expanded tables also count empty cells.
  • Generated CSV text is limited to 25 MiB in total, including all split files.

Task guides

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