Merge Excel online: free, private, no upload
Combine several workbooks into one.
How it works
- 1
Drop two or more workbooks.
- 2
Choose how to combine them.
- 3
Download the merged workbook.
Merge multiple Excel workbooks into one file, either by keeping every sheet or by stacking all rows into a single sheet. Done locally, so your spreadsheets stay private.
Merge multiple Excel workbooks into one file, either by keeping every sheet or by stacking all rows into a single sheet. Done locally, so your spreadsheets stay private. Spreadsheets are read and converted locally in your browser, so sensitive data never leaves your device. Cell styling and formulas are not guaranteed to be preserved.
What people use it for
- Merge Excel for exports, reports and data clean-up.
- Move data between spreadsheets, apps and APIs.
- Process financial or customer data privately.
Tips for best results
- Cell styling and formulas are not guaranteed to be preserved.
- Remove empty rows and merged cells first for the cleanest output.
- Large workbooks may take a moment to process.
Your files never leave your device
Unlike most online PDF tools, Intelli File does not upload your documents to a server. Everything runs in your browser using your own device, so contracts, IDs and financial records stay private. Only a small usage counter is sent so we can apply daily limits.
Read how we handle privacyWhat to do next
After this, you may want to Split Excel, Excel to CSV, or Excel to PDF.
Frequently asked questions
What if sheet names clash?+
Sheets are prefixed with the file name so nothing is overwritten.
Are my files uploaded anywhere?+
No. The conversion runs inside your browser, so your file never leaves your device.
Is it free?+
Free accounts get a few tasks per day; sign up for more, or go Pro for unlimited use and larger files.
Is there a file size limit?+
Files are processed on your device, so the practical limit is your browser's memory. Cell styling and formulas are not guaranteed to be preserved.
Does it work on my phone?+
Yes. Modern mobile browsers run this tool, although large files are faster on a computer.