Email Validator
Validate email addresses instantly. Check syntax, format, domain and RFC 5322 compliance. Support batch validation for multiple addresses.
How does email validation work?
The validator checks the email address syntax against RFC 5322 standards, verifies the domain format, validates the top-level domain, and checks for common formatting errors such as consecutive dots or invalid characters.
Can I validate multiple emails at once?
Yes, you can paste multiple email addresses separated by line breaks or commas, and validate them all at once. The tool will report the result for each address individually.
Does it check if the email actually exists?
This tool validates the format, syntax, and domain structure. It does not send an email or connect to the mail server to verify the mailbox exists. For delivery verification, you would need an SMTP-level check.
What makes an email address valid?
A valid email must have a local part (before @), the @ symbol, and a domain part with a valid top-level domain (TLD). The local part allows letters, numbers, and special characters like +, ., _, and -.
What is RFC 5322?
RFC 5322 is the Internet standard that defines the format of email messages, including the syntax for email addresses. It was published by the IETF and is the primary reference for email address validation.
Why is my email showing as invalid?
Common reasons include typos, extra spaces, missing @ symbol, invalid characters, expired TLDs, or using a reserved domain. Check for leading/trailing spaces and ensure the domain has a valid extension.
Is this tool free to use?
Yes, this email validator is completely free. There are no registration requirements, no usage limits, and all processing happens locally in your browser for maximum privacy.
Does it support international email addresses?
Yes, the validator supports internationalized email addresses (EAI) that use non-ASCII characters in the local part or domain, as defined in RFC 6531.
Can I use this for email marketing list cleaning?
This tool is excellent for catching syntax errors and malformed addresses in your mailing list. However, for comprehensive deliverability testing, you should also verify DNS MX records and perform SMTP checks.
What are MX records and why do they matter?
MX (Mail Exchange) records are DNS entries that specify which mail servers handle email for a domain. A valid email domain should have MX records configured; without them, email cannot be delivered to that domain.
Is my data safe when using this tool?
Absolutely. All email validation is performed entirely in your browser. No email addresses are sent to any server, ensuring complete privacy and data security.
What is a disposable email address?
A disposable email address is a temporary address provided by services like Guerrilla Mail or 10 Minute Mail. These are often used to avoid spam but can indicate low-quality signups in your mailing list.
How to Use Email Validator
Validate one or many email addresses for syntax, format, and RFC 5322 compliance directly in your browser. No address you enter is ever transmitted anywhere.
- Paste your addresses into the Emails (one per line, comma or semicolon) field; lines, commas, and semicolons all work as separators.
- Enable Trim whitespace to strip stray spaces around addresses before they are checked.
- Enable Unique only to remove duplicates so each address is validated once.
- Read the results list: valid addresses pass, while malformed entries like invalid-email are flagged with the reason.
Passing RFC 5322 does not prove a mailbox exists — the tool checks syntax and domain structure, not deliverability.
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