Email List Validator – Free
Validate your email list online (DNS/MX/SMTP checks + more)
6 followers
Validate your email list online (DNS/MX/SMTP checks + more)
6 followers
Upload a CSV and it’ll validate your email addresses by checking syntax, DNS/MX, disposable, typos, and optionally perform a safe SMTP handshake. Great for list cleaning, cutting bounces, and protecting your sender reputation. It's free, online, and no signup.
Sidemail
Hi hunters! 👋
I built this email list validator and would love to share it with you.
Upload a CSV with the email addresses you want to validate, and it performs checks:
- Syntax – Confirms correct proper email format (name@domain).
- Domain & DNS – Verifies the domain exists and resolves.
- MX records – Verifies the domain can receive mail.
- SMTP handshake (optional) – Checks the mail server accepts the recipient (no message sent).
- Disposable domains – Flags temporary inbox providers that can hurt deliverability lists.
- Common typos – Catches mistakes and suggests fixes (e.g., gmial.com → gmail.com).
I built it because most validators hide behind signups or credits. I wanted a no-signup, in-browser checker you can use fast.
It’s free and online.
Also, it's super-simple to use and actionable – it gives you clear reasons to fix potential issues quickly.
Let me know what you think! And if you have any ideas or questions, please do tell :)
Thank you!
Kristyna
Robolly
@k_vrbova Great job, team! This is THE ONLY tool right now that's free and does deep checks and NO ads!
Sidemail
@pkrupar Exactly! Thank you, Patrik.