Free tools. No signup.
Small, fast utilities for everyday analytics work. Everything runs in your browser; nothing you paste here is sent anywhere.
UTM Builder
Build clean, consistent campaign URLs with utm_source, utm_medium and utm_campaign. Includes naming conventions that keep your reports tidy.
Open tool →Referrer Classifier
Paste any referrer URL and see how analytics tools classify it: organic search, social, email, referral, paid, or AI traffic from ChatGPT and friends.
Open tool →User-Agent Parser
Decode any browser user-agent string into browser, version, OS and device type, and check whether it looks like a bot or crawler.
Open tool →Conversion Rate Calculator
Compute conversion rates, compare two periods or variants, and check whether the difference is statistically significant.
Open tool →