SIFTR // LOG ANALYSIS SYSTEM
200MB log files. 3 seconds. Zero crashes.
High-performance log viewer for .NET/IIS environments.
Download from GitHub →Your IIS just crashed. You have a 180MB log file. Notepad hangs. VS Code chokes. Your log aggregator costs $200/month and you just need to find one stack trace. Siftr opens it in 3 seconds.
Capabilities
Heatmap Minimap
Scrollbar-integrated density visualization. See errors, warnings, and patterns across the entire file at a glance. Click to jump anywhere instantly.
Forensic Reports
Automated anomaly detection with temporal segmentation, spike analysis, and component health scoring. 6-pass analysis turns 200MB of noise into actionable findings.
Follow Mode
Real-time file watching with rollover detection. Monitor active log files as your application runs. Never miss a critical error again.
Multi-Format Parsing
Native support for log4net, NLog, Serilog, and IIS W3C formats. Auto-detection means zero configuration — just open the file.
How Siftr Compares
| Feature | Siftr | klogg | Seq |
|---|---|---|---|
| 200MB+ files | ✓ (3s) | Slow | N/A (server) |
| Local / offline | ✓ | ✓ | ✗ |
| Free tier | ✓ (50MB) | ✓ | ✓ (5GB/day) |
| Forensic analysis | ✓ | ✗ | Partial |
| IIS-native | ✓ | ✗ | ✗ |
| Heatmap minimap | ✓ | ✗ | ✗ |
| One-time price | $29 | Free | $186/yr |
Pricing
Free
$0
- Files up to 50MB
- Search & filters
- Heatmap minimap
- Follow mode
- Forensic Reports
- Watch Sessions
- Focus Mode
- IIS Grouping
- Export & Bookmarks
Pro
$29 one-time
- Unlimited file size
- Search & filters
- Heatmap minimap
- Follow mode
- Forensic Reports
- Watch Sessions
- Focus Mode
- IIS Grouping
- Export & Bookmarks
Stop waiting for your logs to load.
Download from GitHub →