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List intersection tool

Extract lines that appear in both lists.

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About this tool

List intersection tool is a free online utility from BlueprintLab Tools. Extract lines that appear in both lists.

Use it when you need to inspect, compare, clean, or transform CSV and structured data quickly.

No account is required. The tool is designed to complete the task directly in your browser with a short input → process → result flow.

How to use

  1. Enter or choose list a.
  2. Enter or choose list b.
  3. Run the tool and review, copy, or use the result.

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List difference toolExtract lines unique to list A or list B.Find and replace toolFind and replace text, optionally using a regular expression.Line prefix / suffix toolAdd the same prefix and suffix to every line.CSV column extractorExtract selected columns from pasted CSV.