Question 1

Can I merge CSV files with different columns?

Accepted Answer

Yes. The merger can combine CSVs even when columns differ by aligning columns by header name and leaving missing values blank where a file does not contain a given column. If your files do not have headers, you can merge by position, but the results depend on consistent column order across files.

Question 2

Is there a limit to the number of CSV files I can combine?

Accepted Answer

You can upload two or more CSV files in one merge. Practical limits depend on your browser and device resources, so very large files or many files may take longer to process. For heavy workloads, consider merging in smaller batches and then merging the batch outputs.

Question 3

How does the tool handle duplicate rows?

Accepted Answer

You can choose whether to keep duplicates or remove them during the merge. When deduplication is enabled, the tool compares full rows and removes repeated rows based on identical values across all columns. If you need deduplication by a specific key column, prepare the data first so the key is part of the row comparison.

Question 4

Can I specify a custom delimiter for my CSV files?

Accepted Answer

Yes. If your files use a delimiter other than a comma, you can set a custom delimiter such as tab, semicolon, or pipe. Using the correct delimiter helps the tool parse columns accurately and prevents data from being merged into a single column.

Question 5

Will the merged file preserve the original file order?

Accepted Answer

Yes, the merged output keeps rows in the same order as the files are added, and within each file it preserves the original row order. If you reorder the uploads before merging, the output will follow that updated sequence.

CSV file merger

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