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Add CSV Column

Append a constant-valued column to every CSV data row.

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A useful toolkit for text, data, images and calculations.

01
Add your input
Choose a tool, enter values or select a file.
02
Make it yours
Adjust the options and run the action.
03
Take the result
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CSV constant column builder online

Add a constant field to every row in an export. The new header must not already exist; the supplied value is literal text.

How to use it

Enter the source input or select Try example. Review New column name, Value. Select Run tool and inspect the result before copying or downloading.

Options and example settings

Option	Choices / value	Example default
New column name	Enter a value	country
Value	Enter a value	Albania

Worked examples

Add a constant field to every row in an export.

Worked example — Add CSV Column

Settings: New column name: country; Value: Albania

Input:

name,age
Anna,25
Ben,30

Output:

name,age,country
Anna,25,Albania
Ben,30,Albania

The example output has 3 lines. Compare its order, separators and whitespace with the input before copying the result.

Limitations and common mistakes

The new header must not already exist; the supplied value is literal text.

Frequently asked questions

How can I append a constant-valued column to every CSV data row online?

Enter the source input or select Try example. Review New column name, Value. 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.