Log Level Filter

The fastest way to silence noise. Log Level Filter isolates ERROR, WARN, INFO, DEBUG, TRACE or FATAL lines from any log paste, letting you focus on exactly the severity you care about.

Output keeps or removes matching lines and reports per-level counts so you see the full severity profile at a glance.

• Level checkboxes — pick any combination.
• Keep or drop mode — isolate or exclude.
• Unmatched lines — keep or remove toggle.
• Per-level counts — full profile.
• Plain-text output — ready to copy.

1. Paste your log lines.
2. Check the levels you want (or uncheck for drop mode).
3. Choose keep-or-drop.
4. Filter. Copy the result.

Example 1 — Debugging. Select DEBUG + INFO to see the fine-grained flow.

Example 2 — Alerting drill. Select ERROR + FATAL only, drop everything else, and review what actually broke.

Example 3 — Noise removal. Check DEBUG and switch to Drop to strip noisy trace lines before analysis.

• Instant focus — one click per severity.
• Lossless — unmatched-line option.
• Profile view — severity histogram.
• Private — fully client-side.