Email Validator: Check Email Address Format and Syntax

Invalid email addresses cause bounced messages, failed form submissions, and dirty data. Our free Email Validator checks email format against RFC 5322 standards, detects common domain typos, and supports batch validation for cleaning email lists.

Why Email Validation Matters

Email validation prevents problems before they happen. Invalid addresses in your database lead to high bounce rates, which damage your sender reputation. In forms, catching typos immediately saves users from never receiving their confirmation emails.

How Email Validation Works

A valid email address has the format local@domain.tld. Our validator checks:

• @ symbol: Exactly one required
• Local part: Characters before @, allowing letters, numbers, and certain special characters
• Domain: Must be a valid hostname format
• TLD: Must be at least 2 characters
• No spaces or consecutive dots

Common Typo Detection

The validator catches common domain typos:

• gmial.com → Did you mean gmail.com?
• hotmal.com → Did you mean hotmail.com?
• outlok.com → Did you mean outlook.com?

How to Use the Validator

Single Email

1. Enter an email address in the input field
2. Click Validate or press Enter
3. See pass/fail status for each validation criterion
4. Review suggestions for fixing issues

Batch Mode

1. Paste multiple emails (one per line) into the batch textarea
2. Click Validate All
3. See a summary of valid vs invalid addresses
4. Each email shows its validation result

Common Use Cases

• Form validation: Check email format before form submission
• Data cleaning: Validate email lists before importing to CRM
• Marketing: Clean mailing lists to reduce bounce rates
• Development: Test email validation logic against edge cases

Frequently Asked Questions

Does this check if the email actually exists? No. This is a format/syntax validator only. Checking whether a mailbox actually exists requires sending a verification email.

What email formats are considered valid? The validator follows RFC 5322 standards, which allows characters like ., +, - in the local part and requires a valid domain with a TLD of 2+ characters.

Can I validate thousands of emails? The batch mode works well for moderate lists. For very large lists, consider a dedicated email verification service.

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Try our free Email Validator to check email addresses now.