JVMind — AI-Powered JVM Performance Analyzer for GC Logs and jstack

Core capabilities

Everything you need to read a JVM incident

Upload a log, get instant statistics and charts, then let the AI explain what's wrong and what to tune.

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GC Log Analysis

Parses JDK 8 PrintGCDetails and JDK 9+ unified logging. Detects G1, Parallel, Serial, Shenandoah and ZGC; reports pauses, throughput, allocation rate, reclaimed memory and the Top 10 slowest events.

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Thread Dump (jstack) Analysis

Parses both jstack -l text and JDK 21+ jcmd Thread.dump_to_file -format=json. Auto-detects deadlocks and lock chains, surfaces BLOCKED threads, thread-pool distribution, lock hotspots, virtual thread and container stats, plus a RUNNABLE flame graph.

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ReAct AI Diagnostics

A real ReAct reasoning loop calls the analyzer tools, then streams a structured diagnosis: health verdict, root cause, tuning suggestions and metrics to watch — token by token.

How it works

Three steps from log file to diagnosis

1 · Upload

Drag in your .log / .gc / .txt / .jstack file. Your file is uploaded and parsed on JVMind's server. The raw content is stored securely and only sent to the LLM when you request AI analysis — your data never reaches a third-party model without your explicit action.

2 · Parse & visualize

Statistics cards, heap/pause charts, pause distribution and flame graphs render instantly. History is retained per session for re-analysis.

3 · AI diagnosis

One click runs the ReAct agent over the parsed summary. It returns a verdict, root cause, tuning advice and follow-up metrics — streamed live.

Beyond analysis

A complete engineering workspace

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Multi-session chat

Independent conversation history and long-term memory (Facts) per session, with file attachments.

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Long-term memory

The agent remembers user facts across conversations via a remember action.

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Team collaboration

Organizations with shared sessions and seat-based Team plans.

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Real streaming

Thoughts, tool calls and the final answer are pushed over SSE in real time.

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OpenAI-compatible BYOK

Pro and Team users can bring their own key; custom-model requests do not consume JVMind's built-in AI quota.

Pricing

Start free now — paid plans coming soon

Free tier includes GC analysis, thread analysis and AI diagnostics. Try it today and upgrade when paid plans launch.

Free

$0/mo

For trying it out and light usage.

Limited built-in AI calls per month
Core GC & jstack parsing
System-provided LLM

Get Started

Pro

Frequently asked questions

Where is my data stored?

Session data, uploaded logs and analysis reports are stored in JVMind's database. Uploaded files are used to produce analysis and are retained with your session history so you can re-open and re-analyze them. See our Privacy Policy for details.

Which log formats are supported?

GC logs: JDK 8 -XX:+PrintGCDetails and JDK 9+ unified logging (-Xlog:gc*). Thread dumps: jstack -l text (all JDKs) and JDK 21+ jcmd Thread.dump_to_file -format=json (with virtual thread details). Files up to your plan's size limit in .log, .txt, .gc, .tdump, .jstack and .json formats.

What if my GC log fails to parse?

If parsing fails or the analysis result looks incorrect, email the log file to [email protected] and we will investigate.

Can I use my own LLM or a local model?

Yes. Pro and Team users can configure any OpenAI-compatible endpoint — OpenAI, DeepSeek, Qwen, and Kimi. When you use your own API key (BYOK), those custom-model requests do not consume JVMind's built-in AI call quota. Free users use the system-provided model and do not need a personal API key.

What is your refund policy?

Subscriptions are handled by Paddle as the Merchant of Record. Refund eligibility and how to request one are described in our Refund Policy.

How do I cancel my subscription?

You can cancel anytime from the in-app Billing panel. Cancellation takes effect at the end of the current billing period — you keep access until then.

How can I contact you?

Email [email protected] for any question about the product, your account, billing or data.

Diagnose JVM performance issues
in minutes, not hours.