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Bethemesh
Data and spreadsheets

Convert Excel, CSV and JSON

Import a CSV, XLSX, XLS or JSON file, preview its data and download it in your chosen format.

  • 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 30 MB

Convert a CSV, Excel or JSON file locally while previewing the data.

Guide

How to use this tool

  1. 1

    Import the file

    Drop a supported format into the input area.

  2. 2

    Review the preview

    Check columns and sample rows.

  3. 3

    Choose export format

    Download the data as CSV, XLSX or JSON.

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

Is Excel formatting preserved?

The tool primarily converts tabular data; complex styles, macros or formulas may not be preserved.

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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