Log pattern tester
Test a regular expression against real log lines and see the fields it extracts.
How it works
Named groups like (?<status>\d{3}) turn each part of a line into a field you can search and chart.
Questions
Why doesn’t my line match?
Check spaces, quotes and optional parts. Anchors like ^ and $ require the whole line to match.
Can I parse JSON logs this way?
Use a JSON parser instead; patterns are for plain-text formats.