How does it handle headers?

We assume the first row of each file is a header. We keep the header from the first file and only add the data rows from the others.

What if my files have different columns?

Currently, we append rows as-is. We recommend that all files share the same column structure for the best results.

Is there a file limit?

You can merge up to 20 files at once in a single batch.

Merge Sheets

Combine multiple spreadsheets into one.

Free No Signup 100% Private No Watermark

Tap to select or drop files here

Processed 100% locally in your browser

Up to 50 MB per file and 150 MB per batch

XLSXXLSCSV

More Excel Tools

How to Use Merge Sheets in 3 Easy Steps

Fast, local, and completely free with no software installation required.

Select or Drop Your File

Choose or drag-and-drop your file into the secure workspace directly from your device.

Customize Settings & Process

Adjust desired quality, options, or target formatting in real-time with instant browser processing.

Download Your Finished File

Save your optimized, watermark-free result immediately with zero server uploads or tracking.

About Merge Sheets

Consolidate data from several Excel or CSV files into one. This tool automatically takes the first sheet from every uploaded file and appends them together. It intelligently keeps the header from the first file and ignores subsequent headers for a seamless merge.

All file conversions, resizing, and processing take place directly in your browser using modern WebAssembly and HTML5 Canvas technologies. No data is stored, tracked, or sent across external networks.