Email Header Analyzer
Read unfolded email headers and recorded delivery hops. Inspect authentication claims as pasted text; this page does not independently verify SPF, DKIM or DMARC.
Open toolEmail Validator
Check a bounded email address syntax. ASCII dot-atom local part and DNS-style domain only.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Check email syntax.
Your result
Enter your details
Result will appear here
How Email Validator works
Check a bounded email address syntax.
ASCII dot-atom local part and DNS-style domain only. Maximum 254 characters. Quoted local parts, international addresses and IP literals are outside scope. No mailbox existence, DNS or deliverability check.
How to use Email Validator
Follow the labelled inputs.
Enter one email address
Replace the example with a single address using the supported ASCII syntax.
Input and settings
Review the address
Check the local part and domain. This tool rejects whitespace and does not accept internationalized addresses or display names.
Tool result
Run, review and save
Select Check email syntax. Review the supported syntax verdict for your supplied address, then copy it or download the result text.
Review the details
Examples and uses for Email Validator
Check the supplied example
The starting example produces Supported email syntax; ada@example.com. Check a bounded email address syntax.
Use your own inputs
Check an address copied from a form or document for common syntax mistakes.
Record a reviewed result
Use the verdict to catch a syntax mistake before entering the address elsewhere. It does not confirm that a mailbox exists.
How to read the result
A supported syntax verdict means the address passed the stated format checks. No DNS, mailbox or deliverability lookup is performed.
Check a bounded email address syntax.
ASCII dot-atom local part and DNS-style domain only. Maximum 254 characters. Quoted local parts, international addresses and IP literals are outside scope. No mailbox existence, DNS or deliverability check.
Supported input and limits
Check the stated scope before you run it.
ASCII dot-atom local part and DNS-style domain only. Maximum 254 characters. Quoted local parts, international addresses and IP literals are outside scope. No mailbox existence, DNS or deliverability check.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolEmail Validator: common questions
Answers about using Email Validator and understanding its results.
Which inputs does this tool accept?
ASCII dot-atom local part and DNS-style domain only. Maximum 254 characters. Quoted local parts, international addresses and IP literals are outside scope. No mailbox existence, DNS or deliverability check.
Can I copy or download the result?
Yes. Copy result copies the syntax verdict, and Download saves the same text. Validation runs in your browser without an account.
Check your email address syntax
Check the supported syntax verdict for your supplied address, then copy or download it.