Compare software

Open Log ViewerULogViewer
Free

Free and open source under GPL-3.0-or-later.

 Free

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

Windows, macOS, Linux Windows, macOS, Linux
  • Opens multiple log files in tabs
  • Follows changes to log files
  • Reads logs from files, network streams, and databases
  • Filters by text patterns, priority, process ID, and thread ID
  • Desktop app built with Electron
  • Some data sources and analysis features require Pro.
  • The Linux installation guide notes that the interface may appear too small on Hi-DPI screens.
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0-or-later License: Proprietary
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 8, 2026

Checked October 7, 2026

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