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hl

High-performance log viewer that converts JSON and logfmt formats into human-readable output with filtering, sorting, and live streaming capabilities for analyzing large log files efficiently.

A high-performance log viewer and processor designed to transform JSON and logfmt formatted logs into clear, human-readable output directly in your terminal. Built for speed and efficiency, it handles gigabytes of log data with minimal overhead.

Key capabilities include:

  • Intelligent filtering - Search logs by field values, log levels, and timestamp ranges with intuitive syntax like today, yesterday, or relative offsets such as -3h
  • Live streaming mode - Monitor logs in real-time with colorized output and automatic sorting by timestamp across multiple sources
  • Field control - Hide or reveal specific fields, automatically remove empty fields, and expand multi-line content with flexible formatting options
  • Lightning-fast sorting - Index and sort hundreds of gigabytes of logs at speeds up to 2 GiB/s, with intelligent reindexing of growing files
  • Complex queries - Build advanced filters using logical conditions (AND/OR) for precise log analysis
  • Flexible customization - Configure behavior through files or environment variables, with support for custom themes and timezone adjustments
  • Cross-platform support - Works seamlessly on macOS, Linux, Windows, and NixOS with automatic pager integration

Ideal for system administrators, developers, and DevOps teams who need to analyze large volumes of structured logs without leaving the terminal.

Features

Config fileJSON outputScriptableTrue color

Media

Pros

5
  • High-performance log viewing and processing
  • Supports JSON and logfmt formats
  • Efficiently parses and analyzes large log files
  • Live streaming and follow modes for real-time updates
  • Flexible filtering and sorting capabilities

Cons

1
  • Relies on external pagers like 'less' for full functionality

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