Bulk email checker online
Validate up to 1000 emails per batch
Upload a CSV or paste a list. We check syntax, MX, SMTP, and disposable domains, then return a clean report you can export.
Best for
- • Cleaning marketing lists
- • Pre-flight campaign checks
- • Lead form validation
- • CRM hygiene
What you get
- • Valid, invalid, risky labels
- • MX and SMTP signals
- • Disposable detection
- • Downloadable CSV
API option
Prefer to automate? The REST API validates addresses one by one with clear JSON responses — wire it into your own batch loop.
Read API docsFAQ
How many emails per batch?
Up to 1000 emails per batch for the free email checker online. Split larger files into smaller runs.
Do you keep my file?
No. Files are processed in-memory and discarded right after validation.
What formats are supported?
TXT with one email per line and CSV with a selectable email column.