Image & Data
Select CSV Columns
Keep, delete or reorder the columns of a CSV and download the slimmed-down file.
Use the tool
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Transparent methodology
What the result includes—and what it does not
Built for people slimming a wide export down to the columns a task actually needs.
Calculation method
- 1Keep-mode outputs only the ticked columns in the order you tick them; delete-mode removes the ticked ones; reorder mode rearranges with up/down controls.
- 2The header row follows the same transformation, so the output is immediately usable.
Assumptions and limits
- Column identity is positional under the hood: files without a header row are handled with generated Column N names.
- File contents are processed locally and never uploaded; the only telemetry is an aggregate operation counter with no file names, column names or contents.
Worked example
Preparing a share-safe file
Input: A 32-column HR export that must leave only name, team and start date.
Output: A 3-column CSV safe to forward — the other 29 columns never leave your machine either.
How to use it
Three steps. One clear answer.
- 1Enter or paste the values requested by the tool.
- 2Review the input units and choose any relevant options.
- 3Calculate, then copy or download the result you need.
Built for trust
Useful without the friction.
- No registration or paywall before your result.
- Responsive controls for phone, tablet, and desktop.
- Clear assumptions and warnings where estimates have limits.
Frequently asked questions
How does the Select CSV Columns work?
Keep-mode outputs only the ticked columns in the order you tick them; delete-mode removes the ticked ones; reorder mode rearranges with up/down controls. The header row follows the same transformation, so the output is immediately usable.
What should I check before using the result?
Column identity is positional under the hood: files without a header row are handled with generated Column N names. File contents are processed locally and never uploaded; the only telemetry is an aggregate operation counter with no file names, column names or contents.
How current is this page?
The methodology and source notes were reviewed on 2026-07-25. Editable rates and inputs should still be checked against the provider or authority linked below.
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