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Extract Columns from CSV Online

Extract selected CSV columns by header name or zero-based index and export as CSV, JSON, or a plain list. Processing stays in your browser—useful for trimming wide exports.

Quick switch→CSV to JSON
CSVExtractorData
Quick switch:CSV to JSONCSV DeduplicatorJSON to CSV

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Use cases

  • Keep only email and id columns from an export
  • Build a plain list from one CSV column
  • Emit a JSON array of selected fields

How to use

  1. Paste CSV and optionally mark a header row
  2. Enter column names or indexes
  3. Choose output format and extract

Example input and output

CSV + columns

name,email,role
Ada,a@x.com,admin
(columns: name,email)

CSV result

name,email
Ada,a@x.com

FAQ

Can I select multiple columns?

Yes. Separate names or indexes with commas, for example name,email or 0,2.

What if a column is missing?

You get an error so you can fix the header name or index.

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