Loglit is a powerful CLI tool designed to make log analysis easier by adding syntax highlighting to your logs in the terminal. It supports a wide range of built-in patterns and allows for custom regex highlighting.
- Syntax Highlighting: Automatically highlights common log elements:
- Log Levels: ERROR, WARN, INFO, DEBUG, TRACE, FATAL, etc.
- Dates & Times: RFC3339, YYYY-MM-DD, MM/DD, durations (e.g.,
10s,50ms). - Numbers: Integers, floats, hex, binary, octal.
- Network: IPv4, IPv6, MAC addresses, URLs.
- Identifiers: UUIDs, MD5/SHA hashes.
- Code Elements: Boolean, null, strings, paths.
- Input Flexibility: Reads from standard input (stdin) or files.
- Custom Patterns: Highlight specific terms or patterns using regex arguments.
- Output Handling: Writes highlighted output to
stderr(preserving stdout for piping if needed) and intelligently handles terminal detection.
go install github.com/madmaxieee/loglit@latestIt writes highlighted output to stderr and raw output to stdout. This means you can "peek" highlighted logs in your terminal while simultaneously piping the clean raw logs to a file or another tool:
tail -f app.log | loglit > clean_logs.txtRead directly from a file:
loglit -i application.logYou can provide additional regex patterns as arguments to highlight them specifically (defaults to a bold/highlighted style):
# Highlight "connection timeout" and specific error codes
loglit "connection timeout" "ERR-\d+" -i app.log- log-highlight.nvim - Inspiration for built-in patterns and highlighting styles.
- tokyonoight.nvim - Color scheme inspiration.