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List Comparison Tool

Find shared items and differences between two lists, one item per line.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: Enter List A and List B separated by a line containing only ---. Results show items in both lists, only A and only B. Leading/trailing spaces and blank lines are removed; repeated items are treated as one item. Choose case sensitivity. Output retains the first spelling and input order. This is set comparison, unlike the line-by-line Text Diff tool. Limited to 200,000 characters and 10,000 input lines.

How to use it (step by step)

  1. 1Type or paste your text into the “Input” box. There is already an example in it so you can see how it works; press Clear to start with your own.
  2. 2Choose your settings: “Comparison”.
  3. 3The answer appears right away in the “Result” box. No button needed.
  4. 4Press Copy and paste the result wherever you need it.

Words to know

List comparison
Checking two lists to find what both have in common and what is only in one of them.
Array / list
An ordered collection of items, like ["apple", "banana"]. Every programming language has one.
Case (UPPERCASE, lowercase…)
How letters are written: UPPERCASE (all big), lowercase (all small), Title Case (Big First Letters). camelCase and snake_case are styles programmers use for names.

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