Log4j Analyzer 4+

Professional Log4j Analysis for macOS

Log4j Analyzer is the most advanced log file viewer for macOS, designed specifically for developers and system administrators who work with Log4j format logs. With revolutionary multi-file correlation, advanced search capabilities, and real-time monitoring, analyzing complex distributed systems has never been easier.

REVOLUTIONARY FEATURES

• Multi-File Timestamp Synchronization
Click any log entry to automatically scroll all open files to the nearest timestamp. Perfect for correlating events across microservices, distributed systems, and multi-tier applications. See the complete picture of what happened across your entire system.

• Advanced Search with Regex
Full regex pattern support with real-time validation and error handling. Search across all columns (timestamp, level, logger, message, thread) with instant highlighting. Smart search history with persistent suggestions.

• Real-Time Log Monitoring
Live tail functionality with GCD-based file system events. Watch logs update automatically as they're written, with zero performance impact. Perfect for debugging active systems and monitoring production environments.

• Unlimited Performance
Research-based pagination handles files of any size while maintaining 60fps UI responsiveness. Open files with millions of entries without slowdown. Smart memory management ensures smooth performance regardless of dataset size.

POWERFUL ANALYSIS TOOLS

• Professional Filtering
Filter by log levels (TRACE, DEBUG, INFO, WARN, ERROR, FATAL) with intuitive toggle controls. Advanced logger filtering with sortable table view for complex hierarchies.

• Column Management
Sortable columns with persistent sort order. Dynamic column widths with intelligent auto-sizing and manual adjustment. Context menu for quick operations.

• Multi-Format Support
Native parsing of both text and XML Log4j formats. Automatic format detection with intelligent plain text fallback for unparseable files.

• Search Result Highlighting
Visual highlighting of search matches across all table columns. Support for both text and regex patterns with automatic activation.

EXPORT & SHARING

• Professional Export Options
Export filtered results to CSV, JSON, or TXT formats with comprehensive formatting. Includes metadata and proper escaping. Native macOS save panel integration.

• Comprehensive Data Preservation
All exports include complete metadata, proper formatting, and accurate timestamp preservation. Perfect for reports, analysis, and documentation.

NATIVE macOS EXPERIENCE

• Document-Based Architecture
Full support for macOS document workflow with file associations for .log, .txt, .out, and .xml files.

• Drag & Drop Support
Direct file loading with visual feedback and validation. Multiple file support for batch analysis.

• Keyboard Shortcuts
20+ native macOS keyboard shortcuts for power users. Full keyboard navigation support.

• Customizable Interface
Adjustable font sizes (8-20pt) with real-time preview. Persistent preferences across sessions. Professional macOS styling with dark mode support.

DEVELOPER-FOCUSED DESIGN

Built by developers, for developers. Every feature is designed to solve real-world problems in log analysis and debugging. From multi-file correlation to regex search, from live tail to professional export, Log4j Analyzer provides the tools you need to understand complex systems quickly.

FREE vs PRO VERSION

Free Version:
• Up to 10,000 entries per file
• 3 files simultaneously
• 5 recent searches
• Export with watermark
• Settings don't persist

Pro Version:
• Unlimited entries per file
• Unlimited open files
• Unlimited search history
• Professional exports
• Persistent preferences
• Advanced shortcuts
• Priority support