You can evaluate the YourKit Java Profiler or .NET Profiler for at no cost. Navigate to the YourKit Evaluation Page
export default AddYourKitLicense;
Using the to access the 2026.3 version brings significant benefits, including improved Snapshot loading times on Windows (even in the background) and better support for newer technologies.
Your annual subscription or maintenance contract is expiring. 1. How to Obtain a New YourKit License Key (2026) yourkit license key new
Double-check the email format for any extra spaces or incorrect characters in the activation key.
If you already have a valid key but are encountering issues, reach out to YourKit support — they are known for fast, helpful responses, even for pre-sales questions.
If it is a fresh installation, a prompt will automatically ask for a key. If you are updating an expiring key, go to the top menu bar and select Help > Register... (or License... depending on your OS). You can evaluate the YourKit Java Profiler or
YourKit offers several types of licenses to fit different development team structures:
Which and IDE (like IntelliJ or Eclipse) are you profiling with? Are you profiling a Java or a .NET application?
Renewing ensures you can always run the latest version of the profiler, which is critical for supporting the newest JVM or .NET runtime updates. Pro Tip: Connecting to Remote Tools If it is a fresh installation, a prompt
Best for individual developers or small teams.
YourKit also has a global network of authorized resellers. This can be helpful if you require local purchasing processes, invoicing in your local currency, or regional support. Examples of resellers include:
Searching for "new" keys through unofficial channels (such as "keygen" sites or forums) introduces significant security risks
Arthur paused. He spun the dial again. 1-9-5-9. The year of the plane crash.
If you are working on a non-commercial open-source project or are a student/teacher, YourKit is incredibly generous with free, full-featured licenses .