Log File Pattern Finder
Paste a small server or application log, or upload a log snippet from your machine, then quickly surface suspicious patterns such as failed logins and noisy IP addresses. Everything runs locally in your browser.
1. Add a log snippet
Use this tool for small to medium log excerpts you are allowed to inspect locally. Large SIEM exports or highly sensitive logs should be handled with your organization’s approved tooling and workflows.
2. Review the patterns
High-frequency sources can hint at brute-force attempts, misbehaving clients, or noisy scanners.
Uses common text patterns such as failed password, invalid user, authentication failure. Always validate against your environment.
Search for additional patterns, for example specific usernames, user agents, or paths. Simple text works, or you can use a regular expression.
Always follow your organization’s policies before exporting or inspecting logs, avoid pasting highly sensitive data, secrets, or regulated personal information, and verify every finding against your own environment and threat model. No single view or pattern can guarantee detection of attacks or misconfigurations. By using this page, you accept that you are solely responsible for how you review, interpret, and act on the results.