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Bethemesh
Data & spreadsheets

Merge Excel or CSV files

Add several CSV or Excel files, combine their rows into one table, and keep columns aligned consistently directly in your browser.

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Customize the result, check the live preview, then copy the code.

Preview

Embed code type

Code to copy

Responsive and automatically resized by Bethemesh.

  • 100% local
  • Instant
  • Free
  • No account
  • Works offline
  • Batch processing

Your files are processed locally in your browser and are never sent to our servers.

Drop your file here

Recommended size: up to 50 MB

Columns with the same name are aligned automatically. Missing columns remain empty.

Result

Why use this tool?

Merge multiple Excel or CSV files into one table while aligning available columns.

100% local and secure

Your data stays on your device and is never sent to our servers.

Smart processing

Clean, structure, and transform your data with rules tailored to the format being processed.

Supported formats

CSV, XLSX, and other tabular formats depending on each tool’s capabilities.

Save time

Get a clean, ready-to-use result in seconds without installing software or configuring a complex workflow.

Guide

How to use this tool

  1. 1

    Add the files

    Drop the tables to combine.

  2. 2

    Review columns

    Check how columns align in the preview.

  3. 3

    Merge and export

    Generate the consolidated file.

Tips and best practices

  • Work on a copy when your data is important.
  • Review the result before reusing it in another application.
  • Processing takes place directly in your browser.

Frequently asked questions

Must files have identical columns?

Shared columns make merging easier. Missing columns may result in empty cells depending on the engine.

Is my data uploaded?

No. Processing happens locally in your browser.

Can I use this tool for free?

Yes. The tool is free and requires no account.

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