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List Union
Combine two lists and keep the first occurrence of each value.
Your results will appear here.
Three steps. That’s it.
A useful toolkit for text, data, images and calculations.
- 01
Add your input
Choose a tool, enter values or select a file.
- 02
Make it yours
Adjust the options and run the action.
- 03
Take the result
Copy the result or download its file.
Unique list combiner online
Build a combined list without repeated values. The first occurrence supplies the retained value and ordering.
How to use it
Enter First list or select Try example. Provide Second list in the second editor. Review Trim spaces, Ignore case. Select Run tool and inspect the result before copying or downloading.
Options and example settings
Worked examples
Build a combined list without repeated values.
Worked example — List Union
Settings: Trim spaces: On; Ignore case: Off
Input:
apple banana SECOND INPUT: banana pear
Output:
apple banana pear
The example output has 3 lines. Compare its order, separators and whitespace with the input before copying the result.
Limitations and common mistakes
- The first occurrence supplies the retained value and ordering.
Frequently asked questions
How can I merge two lists and keep the first occurrence of each value online?
Enter First list or select Try example. Provide Second list in the second editor. Review Trim spaces, Ignore case. Select Run tool and inspect the result before copying or downloading.
Where is my input processed?
The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.
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