Stax

Email Validator

Validate email addresses with 9-point checklist and disposable domain detection.

Why validate email addresses?

Invalid or disposable email addresses in your database increase bounce rates, waste sending credits, and skew analytics. Validating emails before storing them keeps your list clean and your deliverability high.

Single and bulk validation

Use single mode for quick checks with a detailed 9-point breakdown and quality score. Switch to bulk mode to validate hundreds of emails at once — paste from a spreadsheet and get a pass/fail table in seconds.

Frequently asked questions

What checks does the email validator perform?
The validator checks for: exactly one @ symbol, valid local part (before @), no leading/trailing dots, no consecutive dots, valid domain, TLD at least 2 characters, TLD containing only letters, and detection of known disposable email domains.
What is the quality score?
The quality score (0–100) measures how trustworthy an email address appears. Points are awarded for passing each validation check, with bonus points for using a recognised provider like Gmail or Outlook.
What is bulk email validation?
Switch to 'Bulk email' mode and paste a list of emails (one per line, or comma/semicolon separated). The tool validates all of them at once and shows a summary table with valid/invalid counts.
Does this check if an email account actually exists?
No. Client-side validation checks the format and domain quality only — it cannot send a verification ping to a mail server. For deliverability verification, you'd need an SMTP-level check.
How are disposable email domains detected?
The validator checks against a built-in list of ~25 known throwaway email providers like Mailinator, Guerrilla Mail, and YopMail. No external API is called — this works offline.

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