Free tools · Writing

Email Subject Line Tester

Score your cold email subject line for length, spam words and style.

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Want this done for every email, automatically?

Zevmio warms up your inboxes, verifies your leads and sends personalized cold email that lands in the inbox.

Paste your email and find the words and habits that push it into spam.

Count words and reading time, and see if your email is the right length.

Proven, short cold email and follow-up templates you can copy.