Log Analyser

A web-based log file analysis tool that allows you to search, filter, and analyze log files directly in your browser. Also available as a Chrome extension.

Features

• Multiple Input Methods

  • File Input: Multiple files support (.txt, .log, .gz, .zip)
  • Text Input: Direct text paste
  • URL Input (Chrome Extension): Multiple URLs support (one per line)

• Powerful Filtering

  • Include keywords (AND logic)
  • Exclude keywords
  • Text hiding/masking
  • Case-sensitive/insensitive options

• Context View

  • Configurable context lines (up to 500 lines)
  • Double-click on matched line to show context
  • Context lines are highlighted differently
  • File source tracking for each line

• Result Management

  • Configurable output limit
  • Sorting (A-Z, Z-A)
  • Line wrapping toggle
  • Copy results to text input
  • Save results to file
  • File source tracking (hover to see source file)

• Browser-based Processing

  • No server required
  • Files are processed locally
  • Chunk-based processing for large files
  • Memory efficient using IndexedDB for context storage

Chrome Extension Features

• Quick access from toolbar
• Current tab URL auto-fill
• Multiple URLs processing
• Cross-origin requests support

Usage

1. Input Selection

   • Choose between file input, text input, or URL input (Chrome Extension)
   • For files: select one or multiple files (.txt, .log, .gz, .zip)
   • For text: paste directly into the text area
   • For URLs: enter multiple URLs (one per line)

2. Filter Configuration

   • Include Keywords: Lines must contain ALL specified keywords
   • Exclude Keywords: Lines containing ANY of these will be excluded
   • Hide Text: Specified text will be hidden/masked in the output
   • Toggle case sensitivity for each filter type

3. Context Configuration

   • Select number of context lines (0-500)
   • Double-click on any matched line to view context
   • Double-click again to hide context

4. Output Control

   • Set maximum number of output lines
   • Sort results alphabetically
   • Toggle line wrapping
   • Save results to file
   • Copy results to text input
   • Hover over lines to see source file name

Dependencies

• Alpine.js - For reactive data handling
• Pako - For .gz file processing
• JSZip - For .zip file processing
• Pico CSS - For styling

Local Development

1. Clone the repository
2. Open index.html in a browser
3. No build process required

Chrome Extension Installation

1. Clone the repository
2. Open Chrome and navigate to chrome://extensions/
3. Enable "Developer mode"
4. Click "Load unpacked" and select the repository folder

Browser Support

Works in modern browsers that support:

• ES6+ JavaScript
• File API
• IndexedDB
• Promises and async/await