Subject line generator

Generate attention-grabbing, personalization-ready subject lines from your topic using proven cold-email formulas.

Free · No signup · Runs in your browser

Generator / inputtopicfig.

Topic / value propCompany nameoptional

Generator / outputideasfig.

Enter a topic and generate proven subject-line formulas.

About the generator

Proven formulas, instant ideas

Each option follows a formula that performs in real cold outreach — curiosity, relevance, brevity.

Outputs include merge tags like {{firstName}} and {{company}} you can drop straight into a sequence.

Generate several, pick two, and split-test to find your winner.

FAQ4 entries

Still curious? Our team responds in under an hour.

Pick two or three that fit your offer, swap in real merge tags, and A/Z test them in your sequence to find the best performer.

They're placeholders ({{firstName}}, {{company}}). Map them to your platform's personalization fields before sending.

They avoid common spam triggers, but always run your final pick through the Subject Line Analyzer and Spam Checker too.

Yes — regenerate as many times as you like to explore different angles for the same topic.

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Analyze subject lines for spam triggers, length and open-rate impact.

Score open-rate potential, spam risk and mobile preview for any subject line.

Validate your SPF record so your mail is authenticated and spoof-proof.

PLATE · CTAstart nowfig.

Beyond the free tool

Data, warmup, multichannel sequences and AI — one platform, free for 7 days.

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