Log4j Analyzer Pro
Developer Tools
Only for Mac
$39.99
Mac
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.
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
TECHNICAL EXCELLENCE
• Async parsing with progress tracking
• Non-blocking UI for large files
• Background processing
• Memory-efficient streaming parser
• Comprehensive error handling
• Professional logging system
PERFECT FOR
• Software Developers debugging distributed systems
• DevOps Engineers monitoring production logs
• System Administrators troubleshooting issues
• Anyone working with Log4j format logs
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Version 1.20.0
NEW — AI log analysis (Pro)
• Ask AI panel (⌥⌘I): ask about patterns, anomalies, error clusters and likely root causes in your log. Works on huge files via a cached whole-file digest
• Backends: Ollama (local, free), Claude API (your own Anthropic API key, stored in the Keychain; set in Settings ▸ AI)
• Commands: type "filter all errors", "last 15 minutes", "only OrderService", "clear filters" or "bookmark these" to change the view instantly
• Free-form instructions (Claude API): "show db timeouts from this morning" — Claude drives filters, search, time range and bookmarks for you
• Built-in "How to use" tips popover
NEW — formats and tools
• Generic CSV logs: any comma-separated file whose first column is a timestamp opens as a structured log
• HP Indigo ManagedData (no-sn.file.log) and HistoryDB (.dbx) log formats
• Search in Files: recursive folder search with regex; double-click a match to open the file at that line
• Entry Detail pane: full raw text of the selected row, resizable and copyable (⌥⌘D)
• Copy Raw Data from selected entries (⌘⌥R)
• Automatic level classification for stack traces, exceptions and timeouts
FIXED
• Large text logs keep [thread] values
• Log table takes keyboard focus on open, so arrow keys work immediately
• Search field no longer beeps on paste
• Typing in the AI panel is fast on very large files
Questions? dev@codefritters.com
The developer, Robert Černý, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Cerny
- Size
- 18.3 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Codefritters
