Version 2019.1 is for Java 6, 7, 8, 9, 10 and 11. To profile Java 5 or Java 1.4, please download an older version in archive.
* Profiling of both 32-bit and 64-bit processes is supported, but YourKit Java Profiler UI itself requires a 64-bit OS to run.
To get a free 15 days evaluation license key for a fully functional version of the profiler, start the profiler and in the Enter License Key dialog that will appear click Get Free Evaluation Key.