logparse

Parse and search log files. Filter by level, time, pattern.

Install

npm install -g logparse

Usage

# Parse log file
logparse app.log

# Filter by level
logparse app.log --level error
logparse app.log -l warn,error

# Filter by time range
logparse app.log --after "2024-01-01"
logparse app.log --before "2024-01-02"
logparse app.log --last 1h

# Search pattern
logparse app.log --grep "connection failed"
logparse app.log -g "timeout"

# Output format
logparse app.log --json
logparse app.log --csv

# Count by level
logparse app.log --count

# Help
logparse --help

Output

$ logparse app.log -l error --last 1h

  logparse - rtfm.codes
  ─────────────────────
  File: app.log
  Filter: level=error, last=1h

  2024-01-01 11:23:45 [ERROR] Database connection failed
  2024-01-01 11:45:12 [ERROR] Timeout waiting for response
  2024-01-01 11:58:03 [ERROR] Invalid token received

  Found: 3 entries

$ logparse app.log --count
  debug:  1,234
  info:   5,678
  warn:     456
  error:    123
  fatal:      2
  ─────────────
  total:  7,493

Supported formats

# Auto-detected formats
2024-01-01 12:00:00 ERROR Something failed
[2024-01-01T12:00:00Z] [ERROR] Something failed
ERROR 2024-01-01 12:00:00 Something failed
{"timestamp":"2024-01-01T12:00:00Z","level":"error","message":"failed"}

License

MIT

rtfm.codes - read the fine manual