Free converter

Merge several Excel or CSV files into one

Merge several Excel or CSV files into a single Excel file, one sheet per file, in your browser. Useful when every subcontractor or crew leader sends their own report separately.

Processed in your browser, never uploadedUp to 20 files at onceOne sheet per original file

Your file is processed in your browser. It's never uploaded to any server.

Formats it accepts

.xlsx.xls.csv

Who it's for

Technical officeAdministrationSite management

When every supplier, crew, or branch sends its own Excel file, merging everything by hand into one file is the most tedious part of the job — and the easiest to get wrong, copying and pasting rows from one sheet to another.

This converter reads every file you upload in your browser and generates a single Excel workbook with one sheet per original file, named after that file. Nothing is sent to any server.

Drag in the files you want to merge, check the preview of the first one, and download the merged result.

How to use it without losing traceability

The recommended workflow is simple: keep the original file, process a copy and check the preview before downloading it. The converter performs one specific transformation, but it does not decide whether the data is complete, the units are correct or the result fits the system where you plan to import it.

What to check before using the file

Open the result and review several rows at the beginning, middle and end. Check sheet names, headers, separators, special characters and quantities. For technical or financial documents, keep the original beside the converted copy so you can explain which version was used and repeat the process if a difference appears.

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Merge several Excel or CSV files into one | BLOQBASE