Email List Cleaner
Clean your email list in seconds. Remove duplicates, fix invalid formats, strip empty lines, and convert to lowercase. Free, browser-based, no signup required.
One email per line, or comma/space separated
About This Tool
Messy email lists cost you deliverability and sender reputation. Our Email List Cleaner instantly removes duplicate addresses, strips out invalid formats, and eliminates empty lines — all right in your browser. No data is uploaded to any server. Paste your list, choose your cleaning options, and get a polished email list ready for your next campaign.
Frequently Asked Questions
Is my email data safe?
Absolutely. All processing happens locally in your browser. Your email data never leaves your device — no uploads, no server-side processing, no storage.
What counts as an invalid email?
Emails missing an @ symbol, domain part, or TLD are flagged as invalid. The tool checks against standard RFC email format patterns.
Can I paste comma-separated emails?
Yes. The tool accepts emails separated by new lines, commas, or spaces. It automatically detects and splits by any of these delimiters.
How many emails can I clean at once?
There is no hard limit. Since processing runs in your browser, performance depends on your device. Lists of 50,000+ emails work smoothly on modern hardware.