About The List Set Operations

List Set Operations compares two plain-text lists and returns intersection, only-in-A, only-in-B, and union results. It runs locally in your browser.

How to Use List Set Operations Online

1. Paste List A and List B, one item per line.
2. Choose whether to trim whitespace and whether comparison should be case-sensitive.
3. Click Run Set Operations and copy the combined report.

Choosing Options Correctly

Keep trimming enabled for most copied lists. Turn on case-sensitive comparison only when values like ABC and abc should be treated as different items.

Common Use Cases

• When you need to combine multiple datasets into one comprehensive list.
• To identify common elements between two lists for comparison purposes.
• When you want to find unique entries in one list that are not present in another.
• For data cleaning tasks where duplicate entries must be eliminated.

Quick FAQ

Are my lists uploaded?
No. List operations run in the browser.

What types of lists can I use?
Use one item per line or the separator expected by the tool, and keep casing consistent if exact matching matters.

Will the tool modify my original lists?
No. It produces output separately; your pasted input remains editable.

Why did two similar items not match?
Extra spaces, case differences, punctuation, or hidden characters can make items different. Normalize the list before comparing.