Question 1

What file formats are supported?

Accepted Answer

Excel File Merger supports XLS (Excel 97-2003), XLSX (Excel 2007+), and CSV files. You can mix different formats in a single merge operation.

Question 2

Is there a file size limit?

Accepted Answer

Since all processing happens locally in your browser, there is no strict file size limit. However, very large files may be slower to process depending on your device's memory and processing power. We recommend keeping individual files under 50MB for optimal performance.

Question 3

How many files can I merge at once?

Accepted Answer

You can merge as many files as you want. There is no limit on the number of files. Just add all the files you need and click merge.

Question 4

Is this tool really free?

Accepted Answer

Yes! Excel File Merger is completely free to use with no hidden costs, no subscriptions, and no feature limitations.

Question 5

Are my files uploaded to your servers?

Accepted Answer

No! All file processing happens entirely in your browser using JavaScript. Your files never leave your device.

Question 6

Is my data safe?

Accepted Answer

Absolutely. Since files are processed locally and never uploaded, your data remains completely private. When you close the browser tab, all data is cleared.

Question 7

Can I use this for confidential business data?

Accepted Answer

Yes, this tool is ideal for confidential data precisely because nothing is uploaded to any server.

Question 8

What merge modes are available?

Accepted Answer

We offer three merge modes: Single Spreadsheet, Multiple Sheets, and Selective Merging.

Question 9

What happens if my files have different columns?

Accepted Answer

Our smart column matching detects similar column names and offers options to align them.

Question 10

Can I preserve cell formatting?

Accepted Answer

Yes, enable the Preserve Formatting option to keep original cell styles, colors, and formatting.

Question 11

Can I select specific sheets from multi-sheet workbooks?

Accepted Answer

Yes! When you upload a file with multiple sheets, you can select which sheets to include in the merge.

Question 12

The merge is taking a long time. What should I do?

Accepted Answer

Large files can take longer. Try closing other browser tabs, using a modern browser, or breaking up operations into smaller batches.

Question 13

I get an error when merging files. How can I fix it?

Accepted Answer

Common causes include corrupt files, password-protected files, or extremely large cell content. Try re-saving your files in Excel before merging.

Question 14

The merged file looks different from what I expected.

Accepted Answer

Check your merge settings: verify the correct merge mode, header handling options, and sheet selection.

Question 15

The download is not starting.

Accepted Answer

Some browsers or ad blockers may block downloads. Try disabling ad blockers, checking download settings, or using a different browser.

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