Free Email List Cleaner
Clean and validate your email lists for better deliverability. Remove invalid emails, duplicates, and normalize your data. Upload CSV files up to 6MB and get instant results.
No registration required. Your data is processed securely and never stored.Questions? Contact us
Email List Cleaner
Clean and validate your email lists for better deliverability
Upload CSV File
Drop your CSV file here or click to browse
Maximum file size: 6MB
Validation Options
What We Check
Email Format
RFC 5321 compliant validation
Duplicate Removal
Remove duplicate email addresses
Data Cleaning
Trim whitespace and normalize format
Smart Detection
Auto-detect column mappings
💡 Pro Tips
- • Include headers in your CSV file
- • We auto-detect email, name, and subscription columns
- • Custom fields are preserved as metadata
- • Download both cleaned and invalid lists
Comprehensive Email List Cleaning
🎯 Advanced Validation
RFC 5321 compliant email validation checks format, domain structure, and length limits to ensure only valid emails remain in your list.
🔍 Duplicate Detection
Automatically identifies and removes duplicate email addresses while preserving the most complete contact information.
🧹 Data Normalization
Trims whitespace, converts emails to lowercase, and standardizes formatting for consistent, clean data.
🤖 Smart Column Mapping
Automatically detects email, name, and subscription columns from your CSV headers, no manual mapping required.
📊 Detailed Reports
Get comprehensive validation reports showing exactly what issues were found and how many contacts were affected.
📥 Multiple Downloads
Download both your cleaned contact list and a separate file with invalid contacts for further review.
🔒 Data Security
Your email lists are processed securely and never stored on our servers. All processing happens in real-time.
⚡ Fast Processing
Clean thousands of email addresses in seconds with our optimized validation engine built for performance.
🎨 Custom Fields Support
All custom columns in your CSV are preserved as metadata, ensuring no important contact information is lost.
Perfect For
Email Marketing Campaigns
Clean your subscriber lists before sending newsletters and marketing campaigns to improve deliverability rates.
Business Lead Lists
Validate prospect email addresses to ensure your sales outreach reaches the right people.
Event Invitations
Clean attendee lists before sending event invitations to maximize event attendance.
Database Maintenance
Regular cleaning of customer databases to maintain data quality and reduce bounce rates.
Data Migration
Clean email lists when migrating between platforms or consolidating multiple databases.
Compliance Preparation
Ensure your email lists meet quality standards for GDPR and other data protection regulations.
Frequently Asked Questions
Is this tool really free?
Yes! Our email list cleaner is completely free to use with no registration required. You can clean unlimited email lists up to 6MB per file.
What file formats are supported?
We support CSV (Comma Separated Values) files. Most spreadsheet applications like Excel, Google Sheets, and Numbers can export to CSV format.
Do you store my email lists?
No, we never store your data. All processing happens in real-time and your email lists are processed securely without being saved to our servers.
What column headers should I use?
Our tool automatically detects common column names like "email", "first_name", "last_name", and "is_subscribed". Any other columns will be preserved as custom metadata.
How accurate is the email validation?
We use RFC 5321 compliant validation which checks email format, domain structure, and length limits. This catches most invalid emails but doesn't verify if the email address actually exists.