Clean Email Marketing Lists

Remove duplicate emails, normalize formats, maintain deliverability. GDPR-friendly local processing.

100% Local Processing

Up to 10M Rows

Instant Results

The Problem

Email lists grow with duplicates from multiple signup forms, imports, and campaigns. Bounces hurt your sender reputation. GDPR means you can't upload data to random online tools. Manual cleaning misses case and format variations.

Our Solution

Process entirely in your browser - data never leaves your device. Normalize email formats, remove duplicates ignoring case and Gmail dots, keep the most recent subscription date. Export clean lists for your email platform.

Key Features

Features optimized for this use case

Case normalization

Gmail dot handling

Plus alias detection

Keep recent subscription

100% local processing

GDPR compliant

How It Works

Complete data cleaning in three simple steps

Upload List

Import your email CSV

Deduplicate

Clean and normalize emails

Export

Download for your ESP

FAQ

Common questions about this use case

Yes! All processing happens in your browser. No data is uploaded to any server. Your email list never leaves your device.

We normalize Gmail by removing dots and +aliases, so john.doe+promo@gmail.com and johndoe@gmail.com are matched as the same subscriber.

Yes! Use 'keep by oldest date' strategy with your subscription date column to preserve original signup dates.

Ready to Clean Your Data?

100% free. 100% local. Your data never leaves your browser.