Local-first visual log analysis
Your logs already know what went wrong. Find the line that explains it.
LogoRRR is a desktop log viewer for macOS, Windows, and Linux. Turn huge local log files into a visual investigation—without uploading a byte.
macOS · Windows · Linux
Your Data Stays Local
Works Offline
Visual log analysis
Filter, Search & Explore
Use the interactive block view to spot error clusters at a glance. Apply filters, search multiple log files, and navigate to any event in seconds.
Key measurements
Open the log that used to be too large
Open a multi-gigabyte log, move to its middle, jump to its tail, and keep the Java heap bounded. The largest test file was 8 GiB with a 256 MiB Java heap.
8 GiB file, 256 MiB Java heap
8 GiB test with constrained memory
after opening the first, middle, and tail windows
Native
Native Desktop Log Viewer
Built for focused log analysis on macOS, Windows, and Linux, with fast interaction, large-file navigation, and practical system integration.
Private
Your Data Stays Local
Log files never leave your machine. No uploads, no cloud processing, no account required.
Offline
Works Offline
Full functionality without an internet connection. Analyze logs on a plane, in a data center, or behind a firewall.
Visual and local by default
Why LogoRRR
Developers who want visual, local-first investigation of very large logs in a cross-platform desktop GUI.
Desktop log viewersPlatforms
macOS, Windows, Linux
Local / offline
Files are processed on the desktop; no server is required.
Large-file handling
Live tail
Multi-file merge
Filters / highlighting
Your Data Stays Local
Log files never leave your machine. No uploads, no cloud processing, no account required.
- Built for focused log analysis on macOS, Windows, and Linux, with fast interaction, large-file navigation, and practical system integration.
- Full functionality without an internet connection. Analyze logs on a plane, in a data center, or behind a firewall.
Quick Start
- Download & Install
Pick the package for your platform above. Run the installer or open the app bundle — no runtime dependencies required.
- Open Your Log Files
Drop a log file, directory, or supported compressed support bundle onto the window. LogoRRR opens regular files directly and imports bundles into the extraction folder you choose.
- Filter, Search & Explore
Use the interactive block view to spot error clusters at a glance. Apply filters, search multiple log files, and navigate to any event in seconds.
LogoRRR product demo video
Find the One Line That Explains the Failure
See how LogoRRR turns overwhelming local logs into a visual investigation—from millions of lines to the decisive evidence, without sending your data to a cloud ingestion pipeline.
Watch the 53-second demoExplore LogoRRR
LogoRRR - explained
Understand the complete product, learn a workflow, or install LogoRRR for your platform.