A modern web application that processes Google Chrome session files client-side to extract and display all tabs that are/were open. This tool provides a beautiful, user-friendly interface to analyze Chrome session data without requiring any server-side processing.

Access the application directly at: lachlanallison.github.io/chrome-session-viewer

No installation required - just visit the link and start analyzing your Chrome session files!

• Client-Side Processing: All file processing happens in your browser - no data is sent to any server
• Drag & Drop Interface: Simply drag your Chrome session file onto the upload area
• Modern UI: Beautiful, responsive design with Chrome-inspired styling
• Comprehensive Tab Information: View URLs, titles, active status, groups, and history
• Export Options: Export data as JSON or CSV for further analysis
• Filter Options: Show/hide deleted tabs and tab history
• Real-time Favicons: Automatically loads favicons for better visual identification

Chrome session files are typically located at:

Windows:

%LOCALAPPDATA%\Google\Chrome\User Data\Default\Sessions\

macOS:

~/Library/Application Support/Google/Chrome/Default/Sessions/

Linux:

~/.config/google-chrome/Default/Sessions/

Look for files named Session_ followed by numbers (e.g., Session_13390747476041490).

1. Visit lachlanallison.github.io/chrome-session-viewer or open index.html locally in your web browser
2. Either:
   • Drag and drop your session file onto the upload area, or
   • Click "Browse Files" to select your session file

Once loaded, you'll see:

• Statistics: Number of windows, tabs, and active tabs
• Windows: Each browser window with its tabs
• Tab Details: URLs, titles, active status, groups, and history
• Controls: Options to show deleted tabs and tab history

Use the export buttons to save your session data:

• Export JSON: Complete data structure for programmatic use
• Export CSV: Spreadsheet-friendly format for analysis

This application parses Chrome's SNSS (Session Service) file format, which contains:

• Magic number: "SNSS"
• Version number (supports versions 1 and 3)
• Series of commands that reconstruct the session state

The parser handles these Chrome session commands:

• kCommandUpdateTabNavigation (6): Tab URL and title updates
• kCommandSetSelectedTabInIndex (8): Active tab selection
• kCommandSetTabWindow (0): Tab-to-window assignment
• kCommandSetTabGroup (25): Tab group assignment
• kCommandSetTabGroupMetadata2 (27): Tab group names
• kCommandSetSelectedNavigationIndex (7): Current history position
• kCommandTabClosed (16): Tab deletion
• kCommandWindowClosed (17): Window deletion
• kCommandSetTabIndexInWindow (2): Tab ordering
• kCommandSetActiveWindow (20): Active window selection

• Modern browsers with ES6+ support
• File API support for client-side file reading
• ArrayBuffer support for binary data processing

├── assets/             # Images and favicons
│   ├── favicon.ico
│   ├── favicon-16x16.png
│   ├── favicon-32x32.png
│   ├── apple-touch-icon.png
│   ├── android-chrome-192x192.png
│   ├── android-chrome-512x512.png
│   └── Screenshot.png
├── index.html          # Main HTML interface
├── site.webmanifest    # PWA manifest
├── styles.css          # Modern CSS styling
├── session-parser.js   # Core session file parser
├── app.js             # Application logic and UI handling
└── README.md          # This documentation

• No Server Communication: All processing happens locally in your browser
• No Data Storage: Session data is only held in memory during analysis
• No External Dependencies: Works completely offline (except for favicon loading)

This application is hosted on GitHub Pages at lachlanallison.github.io/chrome-session-viewer. The deployment is automatic - any changes pushed to the main branch will be reflected on the live site.

To run locally:

1. Clone this repository
2. Open index.html in your web browser
3. No build process or server required!

This JavaScript implementation is based on the excellent Go version by Aetnaeus:

• Original Source: https://github.com/lemnos/chrome-session-dump
• Translated to JavaScript for client-side web processing

• Client-Side: Runs in web browsers instead of command line
• Interactive UI: Visual interface instead of command-line output
• Real-time Processing: Immediate visual feedback during parsing
• Export Options: Built-in JSON and CSV export functionality

1. "Invalid SNSS file" Error

   • Ensure you're using a Chrome session file (not bookmarks or other data)
   • Check that the file isn't corrupted

2. No Tabs Showing

   • Try enabling "Show deleted tabs" option
   • Verify the session file contains tab data

3. Parsing Errors

   • Some session files may use newer formats not yet supported
   • Check browser console for detailed error messages

• Chrome 60+, Firefox 55+, Safari 12+, Edge 79+
• JavaScript enabled
• File API support

Feel free to contribute improvements:

• Bug fixes for parsing edge cases
• UI/UX enhancements
• Support for additional Chrome session commands
• Performance optimizations

This project maintains the same spirit as the original Go implementation - free to use and modify for personal and educational purposes.