Score subject lines, plan sequences, analyze unsubscribe rates, name your newsletter, and generate CTA copy — all free, in your browser.
Whether you're running a solo newsletter on Substack, a business email list on Mailchimp, or a multi-segment drip campaign on Klaviyo — these tools help you write better emails, plan smarter sequences, and grow an engaged list without expensive software subscriptions.
The Subject Line Tester scores your subject line out of 100 across seven factors: length, spam words, emotional language, numbers, emoji, capitalization, and question format — with an inbox preview for mobile and desktop. The Email Sequence Planner lets you build welcome series, nurture funnels, product launches, and re-engagement sequences with pre-built templates and a full export. The Unsubscribe Rate Analyzer benchmarks your unsubscribe rate against 8 industry averages and generates a personalized action plan. The Newsletter Name Generator creates dozens of name options across six proven naming frameworks with taglines. The CTA Button Copy Generator generates 12+ button text variations by goal, tone, and specificity — with a live button preview.