What do frogs know about logs...
LogFrog is a lightweight browser-based log viewer for JSON, LOG, TXT, and ZIP files developed for personal use.
It was originally built by a Dutch tech enthusiast primarily for NLog outputs and its level tags such as TRACE, DEBUG, INFO, WARN, ERROR, and FATAL.
It runs out of the box, no AI, no Dockers, no Kubernetes, no extensions, no .dlls: just doubleclick and browse logs.
- Load a single log file or a ZIP archive with multiple log files
- Filter by NLog-style levels/tags
- Filter by one or two message keywords
- Expand any entry to inspect the raw JSON payload
- Works entirely in the browser
- No build step, no installation, no backend, no problems
- Large files are limited by browser memory, since LogFrog reads files client-side.
- ZIP archives are unpacked in memory before parsing.