Log Analyzer

Analyzes log files to extract traffic patterns, error spikes, and performance metrics for developers, sysadmins, and IT teams.

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About This Tool

This tool ingests log data from common web and application servers and produces actionable metrics that aid in identifying operational issues. It formalizes a reproducible workflow for parsing, filtering, and aggregating large log datasets into concise summaries. The approach is format aware yet resilient to variations in log structures, adapting to Apache, Nginx, or JSON formats, and it can be integrated into CI pipelines or used as a standalone analysis step. By highlighting traffic shifts, error spikes, and latency distribution, it helps engineers prioritize fixes and optimize capacity planning. Core outputs include request counts, error rates, top endpoints, and latency percentiles, which support performance tuning and incident review. Unique value lies in its balance of auto detection with configurable filters, allowing rapid analysis of diverse log sources without specialized SIEM tooling. Use cases span post-incident analysis, daily monitoring, and quarterly capacity planning, where teams need repeatable, exportable results that fit into existing data workflows. Core features cover ingestion, automatic format detection, field extraction, time window alignment, aggregation, and export in CSV or JSON. Advanced options include custom parsers and cross-log correlation for multi-source analysis. The tool emphasizes speed and clarity, delivering machine readable outputs suitable for downstream analytics.

How to Use

  1. Provide inputs by pasting or uploading log content
  2. Set ISO 8601 time window and optional filters (status, endpoints)
  3. Choose parsing mode if needed or rely on auto detection
  4. Run analysis to produce summary metrics and top endpoints
  5. Retrieve outputs and export as CSV or JSON
How to use free online log analyzer

Frequently Asked Questions

Find Quick Answers

What data sources are supported
The tool supports standard web server logs from Apache and Nginx as well as JSON formatted logs. It auto detects common formats and can accommodate custom formats with parsing rules. It is designed for text based logs and does not require external data sources.
Can I analyze historical archives
Yes. You can paste or upload archived logs and specify a historical time window. The analysis runs over the provided data and yields the same metrics as live data. Large archives may require batching or multiple runs for performance.
What outputs are produced
The tool outputs a structured summary, top endpoints by request count, per minute time series, error rate, and latency percentiles. Results can be exported in CSV or JSON to feed other analytics tools or dashboards.
Is there data retention
Data is processed within the current session and can be exported. Unless the user exports results, no long term storage is performed by the tool. This preserves privacy and minimizes retention risk.

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