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ULogViewerQLogExplorer
Free

The official page offers free downloads; some data sources and analysis features require…

 Free

Free and open source under GPL-3.0.

Windows, macOS, Linux Windows, Linux
  • Reads logs from files, network streams, and databases
  • Filters by text patterns, priority, process ID, and thread ID
  • Handles large files through chunk indexing
  • Supports plain text, JSON, and NDJSON logs
  • Some data sources and analysis features require Pro.
  • The Linux installation guide notes that the interface may appear too small on Hi-DPI screens.
  • Listed downloads are Linux Flatpak and Windows releases
Downloadable app Downloadable app
Closed source Open source
License: Proprietary License: GPL-3.0-or-later
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 7, 2026

Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.