📋 Log Parser

What Can Log Parser Do?

Log Parser is a free online tool that supports parsing Apache Combined, Nginx Combined, and JSON format logs. It provides real-time filtering, status code statistics, request method statistics, and Top URL analysis. Perfect for debugging, log analysis, and performance monitoring. All parsing happens locally in your browser with no server uploads.

Features

• Multiple Format Parsing: Supports Apache/Nginx Combined format and JSON format
• Real-time Filtering: Filter by status code, request method, and URL keywords
• Statistical Analysis: Status code breakdown, method statistics, Top URLs, and request counts
• Table Display: Parsed results displayed in a clear, readable table
• Export Support: Copy and download parsed results in CSV format

How to Use

1. Select log format (Apache/Nginx/JSON) and paste log content.

2. Click "Parse" or let it auto-parse as you type.

3. Use the filter input to search by keyword.

4. View statistics and parsed results, then export as CSV.

Use Cases

Debugging

Quickly filter 500 errors and 4xx anomalies to identify problematic URLs and response times.

Performance Analysis

Analyze Top URLs, request method distribution, and traffic patterns.

Security Audit

Filter suspicious request paths and abnormal status codes to assist security analysis.

Log Format Reference

Apache Combined Log Format: %h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i". Nginx Combined is similar but with slight field differences. JSON format has each line as a JSON object with custom fields. Key log analysis metrics include QPS (requests per second), error rate (5xx ratio), response time distribution, and traffic patterns.