Merge Lists (Union)
Combine two or more lists into a single master file. The Union tool merges specific datasets and offers the option to remove duplicates, giving you a clean, unified set of items. Ideal for combining fragmented lists.
Last updated: 2025-01-27
Settings
List A
List B
Result
About Merge Lists (Union)
Key Features
- Merge multiple lists
- Optional Deduplication
- Combine datasets instantly
- Preserve data integrity
Why Use This Tool?
Merging is a frequent task when dealing with fragmented data. You might have email signups from Facebook and your website that need to be combined into one newsletter list. Or you might have log files from two different servers that need to be analyzed together.
How to Use
- Paste your first list into the "List A" text area.
- Paste your second list into the "List B" text area.
- Check "Remove Duplicates" if you want a unique set (A ∪ B), or uncheck it if you simply want to append List B to List A.
- Copy your combined detailed list from the result box.
Frequently Asked Questions
How large can the lists be?
You can process lists with thousands of items. The only limit is your browser's available memory.
What happens to the order?
List B is appended to the end of List A. If deduplication is active, subsequent duplicate occurrences are removed.
Is my data private?
Yes, absolutely. All processing is done in your browser. No data is sent to our servers.