Compare Two Email Lists
Find overlaps, unique contacts, and duplicates between two email lists in seconds.
Try it now
Try it now
Open List Comparator with a ready-to-run example.
When you need this
- You need to dedupe marketing or outreach lists.
- You want to find overlaps between customer segments.
- You are validating data imports from two sources.
How to do it with Daily Developer Tools
- Paste List 1 and List 2 into the List Comparator.
- Click Compare to see common, unique, and duplicate values.
- Copy each result set or send it to another tool.
Tips / common pitfalls
- Enable case-insensitive mode to normalize email casing.
- Use the Clean buttons to trim whitespace and remove duplicates.
- Paste from Excel or CSV - the tool handles common delimiters.
Examples & test data
Newsletter vs. product signups
Input example (List 1)
alex@example.com riley@example.com devon@example.com
Input example (List 2)
riley@example.com sam@example.com alex@example.com
Expected output
Only in List 1: devon@example.com Common: alex@example.com riley@example.com Only in List 2: sam@example.com
Support vs. sales contacts
Input example (List 1)
sales@example.com support@example.com sales@example.com
Input example (List 2)
support@example.com ops@example.com
Expected output
Only in List 1: sales@example.com Common: support@example.com Only in List 2: ops@example.com Duplicates in List 1: sales@example.com (2)
FAQ
Can I compare lists pasted from Excel?
Yes. The List Comparator accepts newline, comma, semicolon, or tab-delimited data.
Does it find duplicates within each list?
Yes. You can view duplicates for each list separately.
Is comparison case-sensitive?
You can toggle case-insensitive mode for email lists.
Where is my data processed?
Runs locally in your browser. No uploads.
Related tools
Privacy-first: runs locally in your browser. No uploads.