I posted the first version here a few months ago, but today I've got a massive update, that I wanted to share... So basically Log Voyager is a client-side log analyzer that can open multi-gigabyte log files (10GB+) in the browser without crashing, using the File Slicing API to stream chunks rather than loading everything into memory.

Technical approach: Instead of reading the entire file into RAM (which crashes browsers on 2GB+ files), LV use File.prototype.slice() to read 50KB chunks via FileReader. This keeps memory usage constant at ~10MB regardless of file size. For GZIP files I use the native DecompressionStream API.

What's new in v2.0:

- Command Palette (Ctrl+K) for keyboard-driven navigation

- Multi-Filter: apply multiple include/exclude filters simultaneously with regex support

- Error Aggregation: groups similar errors by pattern, shows occurrence counts

- Split View: two independent panels for comparing different file sections

- Heatmap Navigation: visual error density on minimap (red=error, orange=warn)

- Log Statistics: real-time level distribution with bar charts

- Export Selection: export specific lines as TXT/JSON/CSV

- Dark/Light theme toggle

- Full keyboard shortcut system (Vim-style navigation for search, bookmarks, etc.)

Thanks for checking it out (and very appreciate feedback)!

Code: https://github.com/hsr88/log-voyager