Free tools
Free tools for marketers and founders
Calculators and generators that run entirely in your browser. No signup, nothing stored, results update as you type.
UTM builder
Build UTM-tagged campaign links for email, ads and social. Presets for common sources, warnings for typos, one-click copy. Free and private.
Use it freeA/B test significance calculator
Check whether your A/B test result is statistically significant. Enter visitors and conversions to get the p-value, confidence level and uplift instantly.
Use it freeA/B test sample size calculator
Find out how many visitors your A/B test needs per variant and how many days it will take, based on your conversion rate and the lift you want to detect.
Use it freeConversion rate calculator
Calculate your website conversion rate from visitors and conversions, and see exactly how many more conversions or visitors you need to hit your target.
Use it freeBounce rate calculator
Calculate your bounce rate from single-page visits and total visits, and see where it sits against typical ranges for blogs, SaaS and ecommerce.
Use it freeROAS calculator
Calculate return on ad spend (ROAS), profit after ads and your break-even ROAS from your margin. See instantly whether your ads make or lose money.
Use it freeLTV:CAC calculator
Calculate customer lifetime value, customer acquisition cost, LTV:CAC ratio and CAC payback months from your revenue, margin, churn and marketing spend.
Use it freeAnalytics pricing calculator
Compare monthly prices of privacy-friendly analytics tools at your traffic level: Cool Analytics, Plausible, Fathom, Simple Analytics, Umami and Pirsch.
Use it freeCookie banner checker
Answer four quick questions about your site's analytics, ads and embeds to find out whether you likely need a cookie consent banner under GDPR and ePrivacy.
Use it free
See your visitors live in a minute.
One line of code. No cookies. 7 days free.