Compare software

lnav vs fblog: catalog facts
lnav	fblog
Free Free and open source.	Free Free software under the WTFPL license.
macOS, Linux, Command line	Command line
Automatic detection of log formats and compressed files Merges several logs into one view	Prints selected fields from JSON logs Can filter messages with Lua
Meant for small-scale use, not central log collection Terminal interface takes some learning	Designed for JSON logs. Does not support native log tailing.
Downloadable app	Downloadable app
Open source	Closed source
License: BSD-2-Clause	License: WTFPL
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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