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A fast, advanced log explorer.
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doc Update documentation to cover marks and overview. Jan 5, 2012
images Add scripts to build on OSX. Mar 2, 2016
src Merge pull request #235 from Seeraeuber/encoding Aug 13, 2018
tests Make the kqueue monitor to monitor changes in directories too. May 26, 2018
tools CompressedLineStorage now supports >4GB files. Aug 31, 2015
.clang-format Clang-format style file Jun 22, 2017
.gitignore Use right header files on Windows. Jun 18, 2018
.travis.yml Switch to qt 5.10 on Mac (for CI). Feb 13, 2018
COPYING Add the COPYING file (GPL v3 licence) Sep 23, 2009
FileAssociation.nsh Add a Windows icon and improve the installer. Nov 13, 2009 Update Windows build instruction to use new Vista/W7 styles in Qt. Aug 16, 2012
Info.plist Associate to plain text files on macOS. Jul 16, 2017 Update Dec 11, 2017
TODO Minor corrections to docs, TODO and release script. Oct 8, 2010
appveyor.yml Update CI configuration for Windows. May 26, 2018 Add a temporary config.h and make CMake recognise c++11 compiler supp… Nov 16, 2014
finish.sed Add HTML documentation from the website. Apr 14, 2010
glogg.desktop Change comment and desktop file to support opening multiple files. Mar 21, 2017
glogg.nsi Adjust README name in various support files. Aug 5, 2018 Adjust README name in various support files. Aug 5, 2018
glogg.qrc New icons! Jan 30, 2016
glogg48.ico Update the Windows icon. Nov 16, 2009
osx_installer.json Add scripts to build on OSX. Mar 2, 2016 Switch to Qt 5.8.0 for Mac builds, fixing a high CPU usage problem. May 31, 2017 Fix the release script to include the version file in the tarball. Oct 10, 2013 Update dates and add Windows build for x86_64. Nov 2, 2015 Remove Boost from the source repository. Jul 29, 2010 Use right header files on Windows. Jun 18, 2018 Remove some tests affected by race conditions. Dec 20, 2011

Linux and Mac Build Status Windows Build Status

glogg - the fast, smart log explorer

glogg is a multi-platform GUI application that helps browse and search through long and complex log files. It is designed with programmers and system administrators in mind and can be seen as a graphical, interactive combination of grep and less.

Main features

  • Runs on Unix-like systems, Windows and Mac thanks to Qt
  • Provides a second window showing the result of the current search
  • Reads UTF-8 and ISO-8859-1 files
  • Supports grep/egrep like regular expressions
  • Colorizes the log and search results
  • Displays a context view of where in the log the lines of interest are
  • Is fast and reads the file directly from disk, without loading it into memory
  • Is open source, released under the GPL


Installers, binaries and source tarballs are available at


  • GCC version 4.8.0 or later
  • Qt libraries (version 5.2.0 or later)
  • Boost "program-options" development libraries
  • Markdown HTML processor (optional, to generate HTML documentation)

glogg version 0.9.X still support older versions of gcc and Qt if you need to build on an older platform.


The build system uses qmake. Building and installation is done this way:

tar xzf glogg-X.X.X.tar.gz
cd glogg-X.X.X
make install INSTALL_ROOT=/usr/local (as root if needed)

qmake BOOST_PATH=/path/to/boost/ will statically compile the required parts of the Boost libraries whose source are found at the specified path. The path should be the directory where the tarball from is extracted. (use this method on Windows or if Boost is not available on the system)

The documentation is built and installed automatically if 'markdown' is found.


The tests are built using CMake, and require Qt5 and the Google Mocks source.

cd tests
mkdir build
cd build
export QT_DIR=/path/to/qt/if/non/standard
export GMOCK_HOME=/path/to/gmock
cmake ..


Please visit glogg's website:

The development mailing list is hosted at

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