Combine two or more Excel or CSV files into a single workbook — no sign-up, no upload, no file size limit.
Drop Excel or CSV files here, or click to browse
Add two or more files — each becomes its own sheet in the merged workbook, in this order
Your files never leave your device. Everything runs locally in your browser — nothing is uploaded to a server, so there's no file size limit, no subscription, and no one but you ever sees what's in your file.
Add two or more Excel or CSV files using the box above, put them in the order you want using the up/down arrows, then click Merge. Each file's first sheet is copied into its own sheet in a single new workbook, which downloads straight to your device.
Each source file becomes its own sheet in the merged workbook, named after the original filename. This keeps every file's data intact and avoids silently combining columns that don't actually match up — if you specifically need everything stacked into a single sheet, open the merged file afterward and copy the rows across.
Yes — add any combination of .xlsx, .xls, and .csv files and they'll all merge into one .xlsx workbook.
The same order the files are listed in above — use the ↑/↓ arrows next to each file to rearrange them before merging.
No. This tool runs entirely in your browser using JavaScript — your files are read, merged, and downloaded without ever being sent to a server.
Keep a backup of your original file. This tool processes everything locally in your browser, and we've tested it carefully — but no conversion tool handles every PDF perfectly. Always keep your original file and double-check important results before relying on them.