Email Validator
Validate a single email or paste a list for bulk validation. Checks format, TLD, and flags disposable domains — all in your browser.
About Email Validator
The Email Validator checks email addresses for correct format, valid TLD, and known disposable domains — one at a time or in bulk. Paste a list of addresses, click Validate All, and get a table of results you can filter and export as CSV. All validation runs locally in your browser; your email list is never uploaded anywhere.
Use Cases
- →Clean a mailing list before a campaign to remove invalid or fake addresses
- →Validate form input during development without setting up a server-side check
- →Quickly check if an email address looks legitimate before adding it to a database
- →Export a CSV report of valid and invalid addresses for review or handoff
Tips
- ✓Paste one email per line in Bulk mode for fast list validation
- ✓Use Download CSV to get a structured report you can open in Excel or Google Sheets
- ✓Disposable domains like mailinator and yopmail are automatically flagged
- ✓The tool checks format only — it cannot verify that a mailbox actually exists
Frequently Asked Questions
The validator checks for: presence of exactly one @ symbol, a non-empty local part (the text before @), a domain with at least one dot, a top-level domain of 2–10 alphabetic characters, no whitespace, and only valid characters in the local part. It also flags known disposable email domains.
No — this tool checks format and structure only, not whether a mailbox exists. Verifying a real inbox requires sending an email or querying the mail server's MX records, which would require a server-side call.
Paste one email per line in the Bulk tab and click "Validate All". Each address is validated independently and the results appear in a table showing the status (Valid or Invalid) and the reason for any failure.
Disposable email services provide inboxes that expire quickly and are often used to bypass registration requirements. This tool flags 20 of the most common ones — including mailinator, yopmail, and tempmail.
The downloaded CSV has three columns: Email, Status (Valid or Invalid), and Reason. Each field is quoted so that commas or special characters do not break the format.
No. All validation runs entirely in your browser using JavaScript. Your email addresses are never sent to any server. The tool works offline once the page has loaded.