Three straightforward steps
- Choose or paste the input requested by this tool.
- Configure the options and run the operation locally.
- Review and download or copy the result.
Data TOOL
CSV Column Selector
Keep only the columns you need from a CSV and export a smaller clean file.
ON-DEVICESelected input is processed in this browser.
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The selected input stays under your control
On-device processing means the input is handled by browser APIs on the device running this page. Closing or refreshing the page normally clears the active in-memory working session.
Read the Privacy Policy →Create a smaller CSV with only required columns
Remove unnecessary fields while keeping row order intact.
How to use it
- Load the CSV and inspect its headers.
- Select the columns to retain.
- Preview and export the reduced dataset.
Supported input
- Header-based CSV files
- Supported delimited tables
Worked example
Keep only order_id, customer_email and total from a wide commerce export before sharing it.
Limitations
- Removed columns cannot be recovered from the exported copy.
- This does not anonymize values in retained columns.
Troubleshooting
- Keep the original data before removing fields.
- Verify required join keys are selected before export.
Tool-specific questions
Is column order preserved?
Selected columns follow the order supported by the interface.
Are rows filtered too?
No, this tool changes columns rather than row selection.
Before you process
Can I use this csv column selector online without uploading my input?
Yes. This tool is labelled On-device, so the selected input is processed in your browser and is not sent to a ForgeMyFile processing API.
What happens if the browser cannot process it?
The tool shows a readable error and stops. It does not silently fall back to a cloud upload.
Why can performance differ between devices?
The browser is doing the work locally, so speed and practical file size depend on available memory, CPU and browser capabilities.