Email Validator
Validate email addresses in bulk, right in your browser. The OutSends email validator checks formatting, structure, and common typos — privately, instantly, and free.
How it works
Get started with email validator in a few simple steps.
Enter your emails
Type an email address or paste a whole list — one email per line, or separated by commas.
Click Validate
The tool checks each address against a full syntax validation: local part, @, domain, and top-level domain.
Review the results
See a clear valid/invalid badge for each address, then copy the valid list or download it as CSV.
Why use this free tool
Everything you need, integrated in one workspace.
- Catches typos and formatting errors before you send
- Bulk validation — check hundreds of addresses at once
- Private by design: validation happens locally in your browser
- Free forever, no sign-up, no credit card required
Related tools
More free tools to power your email workflow.
Frequently asked questions
What does email validation check?
The tool checks the syntax of each address: a valid local part, an @ symbol, a domain, and a valid top-level domain. It also flags common typos like double dots or spaces.
Is email validation free?
Yes, this email validator is 100% free and runs entirely in your browser.
Does it check if the mailbox really exists?
This tool checks formatting and structure. For a deeper check that also verifies the domain's mail servers (MX records), use the email verifier.
How many emails can I validate at once?
As many as you like. The tool handles large lists instantly because everything runs locally on your device.
Ready to send better emails?
OutSends helps you run cold email campaigns from your own Gmail, SMTP, or API provider with built-in warmup and multi-inbox rotation. Start with a 14-day free trial.