Grok Pattern Tester
Build and test Logstash / Grok patterns against sample log lines with live field extraction.
Runs 100% in your browser. Nothing you enter is uploaded or stored.
(?<client>(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)) (?<method>\b\w+\b) (?<path>(?:/[A-Za-z0-9$.+!*'(){},~:;=@#%&_\-]*)+) (?<status>[+-]?(?:[0-9]+(?:\.[0-9]+)?))| client | 192.168.1.24 |
| method | GET |
| path | /api/v1/health |
| status | 200 |
| client | 10.0.0.5 |
| method | POST |
| path | /login |
| status | 401 |
Related tools
Stack Trace Formatter
Reflow collapsed, JSON-escaped, or single-line stack traces into readable multiline output.
JSON Log Flattener
Flatten nested JSON log objects to dotted-key or CSV form for grepping and analysis.
ANSI Log Cleaner
Strip or render ANSI escape codes in CI and terminal logs.
Regex Tester
Test regular expressions against sample text with live match highlighting and capture groups.
SLA Uptime Calculator
Turn an SLA target like 99.9% into the exact downtime you're allowed per day, week, month, and year.
Error Budget Calculator
See how much error budget an SLO gives you, how much you've burned, and how much is left.
From the makers of these tools
Run production tasks with agents you can trust.
BitSentry turns recurring investigations into reusable runbooks your agents follow step by step, with AI-explained evidence and a full audit trail.
Try BitSentry Desktop Free