Free, no-signup marketing tools. Everything runs in your browser — nothing is stored or sent anywhere.
Write, test and ship better campaigns.
Email Marketing ROI CalculatorEstimate revenue and ROI from your list.Subject Line TesterScore your subject line and preview mobile truncation.Email Spam CheckerFlag spam-trigger words and deliverability risks.Email Signature GeneratorCreate copy-paste HTML signatures for any client.Preheader TesterPreview your subject and inbox preview text.CTA Button GeneratorBulletproof HTML buttons that render everywhere.
Ads & analytics
Measure spend, growth and what actually works.
UTM BuilderBuild tagged campaign URLs for Google Analytics.ROAS CalculatorReturn on ad spend, break-even ROAS and CPA.CAC & LTV CalculatorAcquisition cost, lifetime value and payback.Break-Even ROAS CalculatorThe minimum return on ad spend you need to profit.CPC / CPM / CPA CalculatorCost per click, per thousand and per acquisition.Ad Budget CalculatorSize the spend your revenue goal actually needs.Campaign Name GeneratorConsistent naming so your reporting stays clean.A/B Test Significance CalculatorFind out if your test result is real or chance.Email List Growth CalculatorProject your list size and churn over time.
New tools are added every week. Bookmark this page — or explore our email marketing glossary and best email software guide.