Instantly calculate and visualize your 5 personal fitness heart rate zones with Heart Zone Finder. Just enter your age to get a beautiful, animated breakdown. Optimize your workouts for fat burn, cardio endurance, or peak performance.

Britestak WebUtil is a collection of online tools and utilities that can help you with a variety of tasks. Whether you need to check the status of a website, find a user agent, encode a URL, generate a QR code, or generate a UUIDv4 & many more.