Browser-based · Files stay on your device · No signup

Merge Excel Files Online

Combine multiple Excel and spreadsheet files into one clean workbook in your browser. Merge XLSX, XLS, XLSM, XLSB, CSV, TSV, or ODS files using Append Rows, Preserve Sheets, or Side-by-Side Columns.

Processed entirely in your browser No spreadsheet data sent to servers Optional duplicate row removal No signup required Works on desktop and mobile

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XLSX · XLS · XLSM · XLSB · CSV · TSV · ODS

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How It Works

Merge spreadsheets in 3 simple steps

Upload your files, choose how to combine them, and download the result as XLSX or CSV.

  1. Upload Spreadsheet Files

    Drag and drop or browse to add multiple spreadsheets. Supported formats: XLSX, XLS, XLSM, XLSB, CSV, TSV, and ODS.

  2. Choose Merge Mode

    Select Append Rows, Preserve Sheets, or Side-by-Side Columns depending on how you want the final workbook organized.

  3. Merge and Download

    Click Merge & Download. Processing happens in your browser, and the merged file downloads directly to your device.

Why people use it

  • Save time when merging recurring reports and exports.
  • Reduce manual copy-paste mistakes between files.
  • Keep merged data organized in one clean output file.

Core Features

Combine Excel files into one workbook your way

Choose the merge mode that fits your data, then download a clean XLSX or CSV file in seconds.

  • Merge Multiple XLSX Files and More

    Combine XLSX, XLS, XLSM, XLSB, CSV, TSV, and ODS files in one merge without manual conversion.

  • Append Rows Into One Sheet

    Stack rows from files into a single sheet and align columns by header name when structures differ.

  • Keep Separate Sheets

    Preserve every sheet from every file as separate tabs in one workbook when data should stay separated.

  • Side-by-Side Column Merge

    Place files next to each other in parallel columns to compare exports from different systems.

  • Optional Duplicate Row Removal

    Remove exact duplicate rows after merging to keep final datasets cleaner.

  • Download as XLSX or CSV

    Export to XLSX for workbook output or CSV for simple flat-file workflows.

  • Private Browser-Based Processing

    Files are processed in your browser, so spreadsheet data is not uploaded to our servers.

  • Works Across Devices

    Responsive interface for desktop and mobile browsers on Windows, macOS, Linux, iOS, and Android.

Common merge use cases

  • Combine monthly reports from each branch into one workbook.
  • Merge sales exports from different tools before analysis.
  • Unify supplier lists from multiple teams into one dataset.
  • Collect team spreadsheets while keeping each sheet separate.

FAQ

Frequently Asked Questions

Is this Excel merger free to use?

Yes. MergeExcelFilesOnline.com is free to use and does not require signup. Add your files, choose a merge mode, and download the result.

What is the difference between Append Rows, Preserve Sheets, and Side-by-Side Columns?

Append Rows combines data from the first sheet of each file into one sheet and aligns columns by header. Preserve Sheets keeps every sheet from every file as separate tabs in one workbook. Side-by-Side Columns places file data next to each other in parallel columns.

What happens if my columns do not match?

In Append Rows mode, columns are aligned by header name and missing values are left blank. This helps combine files that do not share the exact same column structure.

Can I merge workbooks with multiple sheets?

Yes. Preserve Sheets mode keeps all sheets from every input file. Append Rows and Side-by-Side Columns use the first sheet from each file.

Will formulas and formatting be preserved?

In Preserve Sheets mode, original sheets are carried into the output workbook. In Append Rows and Side-by-Side Columns, data is converted into merged row-and-column tables, so source formulas and cell formatting are not preserved in the same way.

Are password-protected files supported?

Password-protected or encrypted spreadsheet files are not supported for merging. Remove file protection first, then merge the files.

Is it safe to merge sensitive spreadsheet files?

Files are processed in your browser on your device, and spreadsheet data is not uploaded to our servers. For sensitive files, still use a trusted device and browser environment.

Can I merge Excel files without this tool?

Yes. You can merge files manually in Excel with copy-paste, formulas, or Power Query, but it takes more steps. This tool is built for quicker browser-based merging when you need a fast combined file.