CSV Column Picker
Keep only the columns you name, in that order.
Input
Output
About this tool
Keep only the columns you name, in that order. Everything happens locally in your browser — the text you paste is never sent to a server, which is why it works offline and why it is safe for tokens, keys and production data.
How it works
The tool transforms your input directly in the page: type or paste on the left, read the result on the right. Options apply immediately. Output can be copied or downloaded as a text file.
Is my data uploaded anywhere?
No. There is no backend for this tool — the code runs in the page, so nothing leaves your device.
Does it work offline?
Once the page has loaded it keeps working without a connection.