CSV Column Extractor
Paste CSV data, detect columns, select which ones to keep, and export filtered CSV.
How to use
Paste your CSV
Enter or paste CSV data with headers into the input area.
Select columns
Click Detect Columns, then toggle the columns you want to keep.
Export result
Click Extract Columns to generate filtered CSV and copy it to your clipboard.
Use cases
Data Cleanup
"Remove unnecessary columns from large datasets before importing."
Report Filtering
"Extract only the columns you need from exported reports."
API Data Prep
"Trim CSV exports to match the schema required by an API endpoint."
Frequently Asked Questions
?What CSV format does this tool support?
The tool supports standard CSV with comma delimiters. It handles quoted fields, including fields with commas and escaped quotes inside them.
?Does it require a header row?
Yes, the first row of your CSV is used as column headers. These headers are displayed as selectable buttons for you to choose which columns to keep.
?Is my data kept private?
Yes, all processing happens entirely in your browser. Your CSV data is never sent to any server.
?Can I reorder the columns?
The extracted columns maintain their original order from the source CSV. Select only the columns you need and they will appear in their original sequence.
?What happens with missing values?
If a row has fewer values than the header, missing fields are output as empty values. The tool handles ragged CSV data gracefully.