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Rename CSV Columns

Rename selected headers using a JSON name map.

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01
Add your input
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02
Make it yours
Adjust the options and run the action.
03
Take the result
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CSV header renamer online

Change selected CSV headers using an explicit name map. The resulting header names must stay non-empty and unique.

How to use it

Enter the source input or select Try example. Review Header map as JSON. Select Run tool and inspect the result before copying or downloading.

Options and example settings

Option	Choices / value	Example default
Header map as JSON	Enter a value	{"name":"full_name","age":"years"}

Worked examples

Change selected CSV headers using an explicit name map.

Worked example — Rename CSV Columns

Settings: Header map as JSON: {"name":"full_name","age":"years"}

Input:

name,age
Anna,25

Output:

full_name,years
Anna,25

The example output has 2 lines. Compare its order, separators and whitespace with the input before copying the result.

Limitations and common mistakes

The resulting header names must stay non-empty and unique.

Frequently asked questions

How can I rename CSV column headers online?

Enter the source input or select Try example. Review Header map as JSON. Select Run tool and inspect the result before copying or downloading.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.