glogg is a graphical application for examining large and complex text files. Built with Qt, it combines the searching capabilities of grep with the navigation offered by terminal pagers such as less.
The application is particularly useful when investigating application failures, system events and other problems that produce substantial amounts of diagnostic output. It separates the original file from matching search results, allowing users to investigate relevant lines while retaining their surrounding context.
Rather than loading an entire file into memory, glogg reads its contents directly from disk. This approach makes it suitable for files that would be difficult or impractical to open in conventional text editors.
glogg can also follow changing files, making it useful for observing application activity while a problem is reproduced. Its development has been quiet for several years, so compatibility with newer desktop environments should be checked.
This is free and open source software.
Key Features
- Opens large files without loading their complete contents into memory.
- Provides a separate results panel for matching lines.
- Supports grep-style and egrep-style regular expressions.
- Offers incremental QuickFind searching for locating text.
- Supports wildcard and fixed-string searches.
- Displays surrounding lines to provide context for search results.
- Applies configurable colours to matching patterns and search results.
- Supports UTF-8 and ISO-8859-1 text encodings.
- Can follow files as new lines are appended.
- Provides optional line numbers in the original and filtered views.
- Offers configurable font families and sizes.
- Can restore the previous browsing session.
- Supports opening files through command-line arguments.
- Cross-platform support – runs on Linux, macOS, and Windows.
Website: github.com/nickbnf/glogg
Support:
Developer: Nicolas Bonnefon and contributors
License: GNU General Public License v3.0
glogg is written in C++. Learn C++ with our recommended free books and free tutorials.
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| Chipmunk | Analyse multi-gigabyte files quickly with a responsive graphical interface |
| QLogExplorer | Explore very large files with advanced searches and JSON support |
| glogg | Graphical grep-style searching for very large files |
| Xlogmaster | Monitor files, devices and command output with event-triggered actions |
Read our verdict in the software roundup.
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