Mailchimp CSV Validator
Mailchimp CSV Validator.
Validate Mailchimp audience CSV imports — email addresses and merge fields.
Your files never leave your device
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What it does
Validate Mailchimp audience CSV imports — email addresses and merge fields.
Why use it
Validate Mailchimp CSV imports before upload failures waste hours — checks required columns, formats, and data quality.
Example input
Email Address,First Name,Last Name alice@example.com,Alice,Smith not-an-email,Bob,Jones
Example output
✗ Issues found Health Score: 89/100 (Grade B) ✗ 1 row(s) have invalid email values in "Email Address"
Health Score sample
Health Score: 82/100 (Grade B)
Issues Found:
• 14 duplicate rows
• 3 malformed dates
• 21 missing emails
• 2 inconsistent delimiters
Frequently Asked Questions
Is my data uploaded when using Mailchimp CSV Validator?
No. All processing runs locally in your browser. Your files never leave your device.
Do I need an account?
No account is required. All tools are free and work instantly.
What columns does Mailchimp require?
This validator checks Mailchimp-specific required columns and formats. Upload your file to see a detailed issue list.