https://github.com/rafaelfassi/qlogexplorer
Advanced and fast log explorer with support to JSON files and columns
https://github.com/rafaelfassi/qlogexplorer
columns cpp cross-platform highlighter json linux log log-analyzer log-monitor log-viewer regex windows
Last synced: 2 months ago
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Advanced and fast log explorer with support to JSON files and columns
- Host: GitHub
- URL: https://github.com/rafaelfassi/qlogexplorer
- Owner: rafaelfassi
- License: gpl-3.0
- Created: 2022-01-02T00:47:26.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2026-01-11T12:01:16.000Z (3 months ago)
- Last Synced: 2026-01-11T12:44:41.174Z (3 months ago)
- Topics: columns, cpp, cross-platform, highlighter, json, linux, log, log-analyzer, log-monitor, log-viewer, regex, windows
- Language: C++
- Homepage: https://rafaelfassi.github.io/qlogexplorer/
- Size: 1.69 MB
- Stars: 18
- Watchers: 1
- Forks: 1
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# QLogExplorer
Advanced tool for exploring log files.
## Main features
### Very fast and can handle huge files
The file is not loaded into memory, but indexed by chunks.
It allows a very fast loading, as well as low memory consumption, even when a large file is opened.
`QLogExplorer` also allows to browser the file and to start searching even when the file is still being indexed.
### No locks whatsoever
A monitoring applications shall never interfere with the process that is generating/managing the logs, therefore the process must be able to delete, move or compress the log files without getting any denied operation due the monitoring application is reading it.
`QLogExplorer` never interferes in the log management process.
### Supports JSON log files
Nowadays it's very common log files to be in JSON format as follow:
```json
{"LogLevel":"INFO","DateTime":"28-12-2021 18:03:54.00274","LogMessage":"System initialized"}
{"LogLevel":"WARNING","DateTime":"28-12-2021 18:03:54.00301","LogMessage":"Not in UTC"}
{"LogLevel":"ERROR","DateTime":"28-12-2021 18:03:56.00885","LogMessage":"Exception caught"}
```
`QLogExplorer` completely supports that kind of log format.
[See wiki for further information](https://github.com/rafaelfassi/qlogexplorer/wiki/JSON-Files-Support)
### Templates
Different systems may have different kind of log info, so a template can be created for each kind of log, having:
* Columns definition.
* Highlighters definition.
* Predefined search parameters.
[See wiki for further information](https://github.com/rafaelfassi/qlogexplorer/wiki/Templates)
### Advanced search
The search allows multi-parameters where the parameters can be combined by `AND` or `OR` operators.
Each parameter can:
* Have the search expression as `SubString`, `Regex` or `Range`.
* Be limited to a specific column.
* Use the negation operator.
[See wiki for further information](https://github.com/rafaelfassi/qlogexplorer/wiki/Searching)
## Build
__Minimum requirements__
* C++ 17
* CMake 3.10
* Qt 6.4
If not using Qt creator, make sure the Qt dir is in the PATH.
To build the project via command line:
```
mkdir build
cd build
cmake ../
make
```