Error Log Viewer

Advanced web server error log analysis tool for Apache, Nginx, and IIS. Parse, filter, and analyze your error logs with real-time analytics and diagnostic insights.

Powerful Error Log Analysis Features

Everything you need to diagnose and understand your web server errors

Multiple Error Log Formats

Supports Apache error logs, Nginx error logs, and custom formats. Automatically detects and parses various web server error log structures.

Smart Error Filtering

Filter by error levels (error, warning, notice), client IPs, modules, and dates. Advanced search with debounced input for smooth performance.

Error Analytics Dashboard

View error level distribution, top error-generating IPs, and most problematic modules. Get insights into server health and issues.

Privacy-First Analysis

All processing happens locally in your browser. Your error log files never leave your device, ensuring complete privacy and security.

Export & Reporting

Export filtered error logs for further analysis or reporting. Save cleaned and filtered error data for sharing with your team.

High Performance Processing

Optimized for large error log files with efficient parsing, memoized filtering, and pagination. Handle millions of error entries smoothly.

How to Use the Error Log Viewer

1

Upload Your Error Log

Click "Launch Tool" and upload your error log file (.log or .txt format). The tool supports files from Apache, Nginx, and other web servers.

2

Filter and Diagnose

Use the search and filter options to find specific errors. View analytics for error levels, client IPs, and problematic modules in the sidebar.

3

Export for Analysis

Export filtered error logs for further analysis or create reports. All data processing happens locally for maximum privacy and security.

Supported Error Log Formats

Compatible with most common web server error log formats

Apache Error Log Formats

  • • Apache Error Log Format
  • • Apache Error Log with Module Info
  • • Apache Error Log with Client IP
  • • Custom Apache error formats

Other Server Error Formats

  • • Nginx error logs
  • • IIS error log formats
  • • Generic timestamped error logs
  • • Flexible pattern matching

🔍 Common Error Log Analysis Use Cases

  • • Identify recurring server errors and their root causes
  • • Monitor client IP addresses generating errors
  • • Track error patterns by module or component
  • • Analyze error trends over time periods
  • • Generate reports for server health monitoring

Ready to Analyze Your Error Logs?

Start diagnosing your web server errors instantly. No installation required, completely private, and works directly in your browser.