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CSV Category Mapping Applier

Replace exact column values using an explicit JSON string dictionary.

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Replace exact column values in CSV data online

Replace exact column values using an explicit JSON string dictionary. Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

How to use it

Paste the multi-line input in the format shown below. Supply value mapping json in the second input. Set category column. Choose Run tool. Review the output, then copy or download it.

Options and example settings

Option	Choices / value	Example default
Category column	Enter category column.	team

Worked examples

Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

Reproducible worked example

Settings: Category column: team

Input:

name,team,amount
Anna,A,10
Ben,B,20
Cara,A,30

Value mapping JSON:
{"A":"Alpha","B":"Beta"}

With the input and settings above, the tool produces:

Output:

name,team,amount
Anna,Alpha,10
Ben,Beta,20
Cara,Alpha,30

The example output has 4 lines. Compare its order, separators and whitespace with the input before copying the result.

Limitations and common mistakes

Results reflect your supplied input and selected settings. Check the worked example and output before reuse.
Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.
Both inputs must follow their own documented format. Changing direction or mode can require different input; the example is for the displayed settings.

Frequently asked questions

What format should I enter?

Paste the multi-line input in the format shown below. The second input is value mapping json. The worked example shows the supported structure and actual output.

How can I replace exact column values in CSV data online?

Paste the multi-line input in the format shown below. Supply value mapping json in the second input. Set category column. Choose Run tool. Review the output, then copy or download it.

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.