Deduplicate an Email List Online
Paste an exported list of email addresses, one per line, and get back a case-insensitive unique list. Because the deduplication happens on your device, customer contact data never leaves your browser.
Runs in your browser — your text is never uploaded or stored.
Email list (one per line)
Unique emails
How to Use
- 1.Paste your exported email list with one address per line.
- 2.Duplicates are removed, ignoring differences in capitalisation.
- 3.Copy the clean list back into your CRM or campaign tool.
Advertisement
FAQ
Is my contact list uploaded?
Everything runs locally in your browser with JavaScript — nothing is uploaded, logged or stored. That matters when the list contains customer data.
Does it validate the addresses?
No — it only deduplicates. Use the Extract Emails tool to pull valid-looking addresses out of messy text first.
Need more options?
Remove Duplicate Lines
Paste any list to instantly remove duplicate lines with an optional case-insensitive mode. Free, private and runs 100% in your browser.