We've all been there.
You're debugging a production issue at 2 AM. Your Nginx access log is 8GB. You run some grep, awk, and cut commands, wait for minutes, and still end up with messy, incomplete insights.
After one too many frustrating nights, I decided to build LogBlast — a modern, high-performance CLI log analyzer written in Rust.
Why Another Log Tool?
Most solutions fall into two categories:
- Heavy platforms like ELK Stack, Loki, or Splunk (overkill for quick analysis)
- Ancient shell one-liners that are slow and painful to maintain
I wanted something in the middle: fast, lightweight, beautiful, and actually useful.
What is LogBlast?
LogBlast is a Rust-powered CLI tool that parses and analyzes large log files with excellent speed and low memory usage.
It currently supports:
- Nginx & Apache access logs (Common + Combined format)
- Structured JSON / NDJSON logs
- Plain text logs with various timestamp formats
Key Features
- Streaming architecture — Processes multi-GB files without loading them fully into memory
- Smart auto-detection of log formats
- Powerful filtering: by time range, log level, IP, HTTP status, regex, etc.
- Rich statistics with beautiful colored terminal output
- Built-in anomaly detection (error spikes, IP bursts, 5xx storms)
- Export to CSV and JSON
- YAML config for reusable filters and rules
- Cross-platform (Linux, macOS, Windows)
Performance
Here are some real benchmarks:
- 1 GB Nginx log → Full analysis in ~3.8 seconds
- 10 GB JSON logs → Processed in ~38 seconds
- Memory usage stays consistently under 15 MB regardless of file size
It gives you full statistics and anomaly detection for roughly 3x the time of a simple grep.
Why Rust?
Rust made this possible because of:
- Zero-cost abstractions
- Excellent memory safety and control
- Great ecosystem for building fast CLIs (
clap,ratatui,comfy-table, etc.) - Easy cross-compilation for all major platforms
Try It Out
You can install LogBlast right now:
# Via cargo
cargo install logblast