Free tool

    Free bulk email checker

    Paste up to 10 addresses, one per line. Each one gets a live SMTP check and a valid, invalid or risky verdict you can export as CSV — no signup required.

    0 valid addresses detected

    Frequently asked questions

    How many emails can I check for free?

    Up to 10 addresses per run and 10 checks per browser per day. For larger lists, a free account unlocks CSV uploads of up to 50,000 rows per file.

    What file formats does the full bulk uploader accept?

    CSV and TXT. Every original column in your file is preserved and returned alongside the verification result, so you can drop the export straight back into your CRM.

    How long does a bulk list take?

    Small pastes finish in seconds. Large CSV jobs run in the background with resumable processing, and you can download partial results while the job continues.

    Verify the whole list

    A free account unlocks CSV uploads of up to 50,000 rows per file and an API for real-time checks at signup.

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