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Bethemesh
Data & spreadsheets

Clean an Excel or CSV file

Import an Excel or CSV file, choose cleanup operations, preview the result and export it without uploading your data to a server.

Open in Workspace

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

Preview

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Responsive and automatically resized by Bethemesh.

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

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

Cleaning options

Result

Why use this tool?

Clean an Excel or CSV file by removing duplicates, empty rows and extra spaces without uploading it to a server.

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

    Import the file

    Drop a supported file and review the preview.

  2. 2

    Choose operations

    Enable the cleaning rules needed for your data.

  3. 3

    Export the result

    Download the cleaned table in an available format.

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

Does the file leave my device?

No. Processing is performed locally in the browser.

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.

Was this tool useful?

GuideBest practicesIntermediate

Build a reproducible data-preparation workflow

Put cleaning, validation, filtering, merging, comparison and conversion in a sensible order, and learn when a reusable pipeline is better than isolated tools.

29 August 20262 minRead

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