A valid license key is required to unlock the full features of YourKit. Without a license key, you can still use the tool in demo mode, but you'll be limited to a 30-day trial period. After the trial period expires, you'll need to purchase a license key to continue using the tool.
: Discounted tier for individual developers using private funds.
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 .
: The previous installation was not properly deactivated, and the seat license is still marked as in use. yourkit license key new
For automated deployments — such as in CI/CD pipelines, Docker containers, or when provisioning many developer workstations — you can activate the profiler silently using the command line. The general pattern is:
Use the link in your original license certificate email.
That wasn't the name of the billing system, or the inventory tracker, or the customer portal. Wanderlust was a ghost. It was the internal codename for the project his mentor, Silas, had been working on before the heart attack took him five years ago. Silas, the genius architect who believed that code was poetry and that modern frameworks were "scaffolding on a sinking ship." When Silas died, the project was supposed to have been decommissioned, the servers wiped. A valid license key is required to unlock
After you have activated your new license key, there are several management tasks you may need to perform over time.
For single‑seat licenses, annual subscriptions start at $449 (basic support) or $579 (advanced support), while perpetual licenses begin at $549 (basic) or $713 (advanced). Five‑seat packs offer substantial volume discounts.
Acquiring a new license key is a straightforward process handled directly through the YourKit website. Step-by-Step Purchase Process : Discounted tier for individual developers using private
: Geared towards larger enterprises. A centralized server leases keys dynamically to concurrent users across the organization. 3. Free Community and Academic Licenses
For headless environments or CI/CD pipelines, you can activate the profiler via the command line:
If you have never used YourKit before, or if your previous license has expired and you need a fresh start: Navigate to the YourKit Buy Page. Select the product (Java or .NET Profiler). Choose the license type:
Support for the latest Java Virtual Machine (JVM) versions.