Question 1

Is JVM CodeLens free to use?

Accepted Answer

Yes. JVM CodeLens offers a free Community tier that includes core JVM monitoring, GC log analysis, heap dump analysis, thread dump analysis, and AI diagnosis with your own API key. Pro ($14/month) and Ultra ($29/month) tiers add advanced diagnostics, remote monitoring, and unlimited AI analysis.

Question 2

Does JVM CodeLens upload my source code or heap data?

Accepted Answer

No. JVM CodeLens is a desktop application that runs entirely on your machine. All JVM metrics, heap dumps, thread data, and source code stay local. The only external communication is optional AI analysis requests sent to your configured LLM provider (Claude, OpenAI, Gemini, or fully local Ollama).

Question 3

What JVM diagnostic formats does JVM CodeLens support?

Accepted Answer

JVM CodeLens supports GC log files from all major collectors (G1, ZGC, Shenandoah, CMS, Parallel), heap dump files in HPROF format, thread dumps in standard text format, and JDK Flight Recorder recordings (.jfr). It also provides live JVM monitoring via JMX.

Question 4

What Java versions does JVM CodeLens support?

Accepted Answer

JVM CodeLens supports monitoring and diagnostics for JVMs running Java 11 through Java 24. The application itself requires Java 17 or later to run, and a JDK is needed for full attach capabilities.

Question 5

Can JVM CodeLens monitor remote JVMs?

Accepted Answer

Yes. Pro and Ultra tiers support remote JVM monitoring via JMX connections. You can connect to any JVM that has JMX remote access enabled, including those running in containers or on remote servers.

Question 6

How does AI-powered analysis work in JVM CodeLens?

Accepted Answer

JVM CodeLens integrates with Claude, OpenAI, Google Gemini, and locally-hosted Ollama models. The AI analyzes your JVM metrics, GC patterns, heap dumps, and thread states to provide actionable diagnostic recommendations and code-level insights. All parsing is done locally — only an analysis summary is sent to the AI provider.

Question 7

How is JVM CodeLens different from YourKit or JProfiler?

Accepted Answer

JVM CodeLens uniquely combines AI-powered root cause analysis with source code correlation. While traditional profilers show JVM metrics, JVM CodeLens pinpoints the exact file and line of code causing issues. It also offers predictive forecasting, automated memory leak detection with 8 specialized detectors, and a free Community tier.