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Bethemesh
Data & spreadsheets

CSV Column Rename

Change CSV header names while preserving all values and column order, then retrieve the updated file directly in your browser.

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  • 100% local
  • Instant
  • Free
  • No account
  • Works offline
  • Clipboard

One rename per line: old => new

Why use this tool?

Rename several CSV headers in one operation without changing any data rows.

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.

Fonctionnement

How does this tool work?

The tool reads the CSV header, lets you rename one or more columns, and applies the changes consistently to every row without modifying the underlying data. The updated CSV keeps its original structure and is immediately ready for export or further processing.

Use cases

Adapt a schema

Align column names with the fields expected by a target application.

Standardize exports

Apply consistent naming conventions across several source files.

Improve readability

Replace internal codes with clearer labels for users.

Guide

How to use this tool

  1. 1

    Add the data

    Paste the CSV or provide the information required by the tool.

  2. 2

    Configure processing

    Choose the columns, rules, or options that match your objective.

  3. 3

    Review the result

    Check the report, then copy or download the generated data.

Tips and best practices

  • Keep a copy of the source file before applying an important transformation.
  • Check the delimiter and header-row setting before running the operation.
  • All processing stays in your browser and no CSV file is uploaded.

Frequently asked questions

Are my CSV data uploaded?

No. Parsing, comparisons, and transformations are executed locally in your browser.

Are quoted fields supported?

Yes. The CSV engine supports delimiters inside quoted fields and multiline quoted content.

Can I download the result?

Yes. When a new CSV is produced, it can be copied or downloaded directly from the page.

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