About this tool
Paste two lists and get the items in both, in either, only in the first, only in the second, or in exactly one of them.
Both lists are reduced to unique items (after optional trimming and case folding) and compared as sets; the result keeps the order of first appearance.
Example: A = 1, 2, 3 and B = 2, 3, 4 → only in A: 1; in both: 2, 3.
Typical uses: who signed up but did not pay, which SKUs are missing, which emails are new.
Quick steps
- Paste your text or open a file (or press Try an example).
- Choose the options — the result updates as you type.
- Copy the result or download it as a file.
Everything runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Compare Lists (union, intersection, difference) work?
Both lists are reduced to unique items (after optional trimming and case folding) and compared as sets; the result keeps the order of first appearance.
What should I keep in mind?
Typical uses: who signed up but did not pay, which SKUs are missing, which emails are new.
Is my text uploaded or saved?
No. It is processed on your device in a separate background task that is stopped if it takes too long; nothing is stored or sent.