Do the files need the same columns?

For stacking, yes — the same columns in the same order (the header is kept once). Files with different columns are best put on a sheet each.

Can I edit the result before downloading?

Yes. The file opens in Mega Excel Studio, a full spreadsheet with an AI assistant — change anything, then download.

Is it safe to convert CSV to Excel here?

Yes. Your file travels over an encrypted connection and stays private to you — nobody else can open it. Projects you save are kept in your account until you delete them, and download links we email you expire after 7 days.

Excel Tools

Merge CSV Files

Combine CSV files into one table or one workbook. It opens in Mega Excel Studio, so you can check and change anything before you download.

Drop the files to merge

or browse from your device — two or more CSV or Excel files

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Convert CSV to Excel online, the right way

Monthly exports, store reports and survey batches come as many CSV files that belong in one table. Drop your file, choose the options that matter, and it opens in Mega Excel Studio with the export window ready. Files are stacked one under the other with the header kept once — or put on a sheet each — in the order you choose. Nothing is final until you say so: fix a value, rename a heading or restyle it, then download your Excel file — or another format from the same window.

One table or one workbook

Stack the rows or keep a sheet per file.

Checked in Mega Excel Studio

See the result and change anything before you download.

Other formats too

The same export window offers every other format.

Frequently asked questions

You can open your file, convert it and check or change everything in the studio before you pay anything. Downloading the finished file is part of every MojoPDF plan — start with the 7-day trial for $1 and cancel any time.