Free web analytics tools with the math showing.
Build campaign URLs, standardize names, calculate rates and sample sizes, check a GA4 event name, or audit an analytics privacy setup. Inputs stay in the browser and every tool publishes its method and limits.
UTM campaign URL builder
Build a clean campaign URL with validated UTM parameters, preserve existing query strings, and learn a naming convention your analytics reports can keep tidy.
Open toolTool 02Campaign naming convention builder
Turn market, objective, offer, and date into a consistent campaign name that stays readable across GA4, privacy analytics, ads, and reporting exports.
Open toolTool 03Conversion rate calculator
Calculate a website conversion rate plus a Wilson 95% confidence interval, so a small sample is not presented with more certainty than the data supports.
Open toolTool 04A/B test sample-size estimator
Estimate visitors per variant for a two-sided conversion-rate experiment using baseline rate, minimum detectable lift, confidence, and statistical power.
Open toolTool 05GA4 event name checker
Check a proposed GA4 web event name for the 40-character limit, letter-first format, Unicode letters, allowed characters, and current reserved web names.
Open toolTool 06Analytics privacy checklist
Review eight practical analytics data-governance controls and receive a transparent gap list covering collection, consent, retention, access, deletion, and vendors.
Open toolNo account. No payload. No mystery score.
The calculator functions run in the page and do not submit values to a server. Results remain visible only in the current browser tab unless you copy them. The privacy checklist returns every open gap rather than hiding the reasoning behind one badge.
These are planning and quality-assurance utilities. They do not replace a statistical design, legal review, production test, or vendor contract.