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Merge CSV

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Merge CSV files

Combine the rows of 2 or 3 CSV files or Excel worksheets into one CSV. Columns are matched by their names — you check the matching before anything is combined.

Processed locally in your browser. File contents are not uploaded.

Step 1: Choose files

  • 2 or 3 files · CSV up to 50.0 MB each · Excel .xlsx up to 10.0 MB, one worksheet per file (the same workbook can be chosen again for another sheet) · up to 100.0 MB of data together. A worksheet counts as the size of its data as CSV.
  • The order of the files is the order of the rows: file 1's rows first, then file 2's, then file 3's.

Choose 2 or 3 CSV files or Excel workbooks

Drag files here, or choose them — several at once if you like. Processed locally in your browser. File contents are not uploaded.

Step 2: Match columns

Choose at least two files first.

Step 3: Review merged data

Choose at least two files first.

Step 4: Download

The download opens once the preview is ready.