AI log analyzer
Paste logs or a stack trace, get the root cause, the evidence lines, and the fix.
Your key stays in your browser.It goes straight to the provider, never to our servers, and we neither log nor keep it. Use a dedicated key with a spending cap, and delete it in the provider's dashboard when you are done.
Input
Result
The result will appear here.At two in the morning, a crash loop's logs are a wall of retries, warnings and shutdown noise, and the real failure is somewhere near the top. Paste the logs, a stack trace or CI output and get the most likely root cause with a confidence level, the exact lines that prove it, and numbered fix steps with a way to confirm each one worked. The prompt adapts analyze_logs from danielmiessler/Fabric and teaches the model the usual signatures: ETIMEDOUT and ECONNREFUSED, OOM kills, pool exhaustion, TLS errors, missing environment variables and crash-loop back-offs.
How it works
- Lines are numbered before sending, so every piece of evidence is quoted with its line number or timestamp.
- In a stack trace the model separates your application's frames from node_modules, site-packages and runtime frames, and follows any Caused by chain.
- Passwords, tokens and connection strings found in the logs are flagged as exposed and never repeated in full in the answer.
Where your data goes
With your own key, what you type and the key go from your browser straight to the provider you choose; neither passes through Hysen Labs. In hosted mode, your text goes through our server to our provider (DeepSeek) and is billed in credits; we keep the token counts and cost of each run for billing, never the text itself or the answer. How the provider handles the text is governed by its own privacy policy.
This tool handles keys and credentials, so nothing about a run is saved, not even to your own history.
About your API key
We do not collect, store or leak your key: it lives only in this page's memory (unless you tick “remember in this tab”) and is gone when you close it. Still, treat any key you have pasted into a web page with care — create a dedicated key with a spending cap for use here, and delete or rotate it in your provider's dashboard when you are done.
What it costs
This tool is free, with no sign-in and no points.
Common questions
- Should I remove secrets before pasting?
- Yes, when you can: logs often contain tokens, emails and connection strings, and whatever you paste goes to the AI provider you picked (only to them — from your browser, with your key). Use a separate, capped key for debugging sessions, and rotate any secret that has appeared in logs anyway.
- How many lines should I paste?
- Start from a little before the first error and include the whole stack trace; a few hundred lines is usually plenty. Cutting the lines before the first error hides the cause, and pasting hours of healthy traffic only buries it.
- What if the logs are not enough to find the cause?
- The answer ends with a To narrow it down section: the log level to enable, the command to run, or the metric to check next. Add what you find to the logs and run it again; the second pass is usually decisive.
The open-source behind it
This tool's prompt is adapted from danielmiessler/Fabric (MIT) and runs on the model you choose. To use the same capability from the command line or inside your own program, start with that project.
danielmiessler/FabricAlso known as
- ai log analyzer
- stack trace analyzer
- analyze logs online
- error log explainer
- debug error with ai