ULogViewer is a .NET based cross-platform universal log viewer written by C# which supports reading, parsing and analysing various type of logs.
Operating System | Download | Version | Screenshot |
---|---|---|---|
Windows 8/10/11 | x86 | x64 | arm64 | 2.0.19.220 | |
macOS 11/12 | x64 | arm64 | 2.0.19.220 | |
Linux | x64 | arm64 | 2.0.19.220 |
- Log analysis including finding key logs, calculating duration of operation, even writing your own script to analyze logs.
- Listing and managing added log files in side panel.
- Categorizing logs by timestamp automatically.
- Setting precondition to control logs loaded from files.
- Supporting writing your own script to read raw log data.
- Support setting log profile as template.
- New
Azure CLI
,MySQL Database
andSQL Server Database
built-in log data sources. - New
Android Device System Trace
,Azure Webapp log Files
,Linux Real-time System Wide Log
,ULogViewer Log File
andULogViewer Real-time Log
built-in log profiles. - New
Azure Webapp Log Stream
built-in log profile template. - Supporting editing PATH environment variable.
- Adding
zh-CN
language support. - UI/UX Improvement.
- Standard Output (stdout).
- Files.
- Windows Event Logs (Windows only).
- HTTP/HTTPS.
- TCP (without SSL).
- UDP.
- SQLite Database.
- Azure CLI [Pro][v2.0+].
- MySQL Database [Pro][v2.0+].
- SQL Server Database [Pro][v2.0+].
- Log Data Source Script [Pro][v2.0+].
Each log profile defines:
- What log data source should be used.
- How to parse log data into structured logs.
- What properties of log should be displayed in the list.
- How to output logs back to text (ex, copying).
Currently there are 28 built-in log profiles:
- Android Device Event Log.
- Android Device Log.
- Android Device System Trace [macOS/Linux][v2.0+].
- Android Log Files.
- Android Kernel Log Files.
- Android System Trace File.
- Azure Webapp log Files [Pro][v2.0+].
- Azure Webapp Log Stream [Template][Pro][v2.0+].
- Git Log.
- Git Log (Simple).
- Linux Kernel Log [Linux].
- Linux Kernel Log Files.
- Linux Real-time System Wide Log [Linux][v2.0+].
- Linux System Log [Linux].
- Linux System Log Files.
- macOS Installation Log [macOS].
- macOS Real-time System Wide Log [macOS].
- macOS System Log Files.
- NLog (TCP).
- Raw Text In Files.
- Raw HTTP/HTTPS Response.
- Raw Text From TCP Client.
- ULogViewer Log File [v2.0+].
- ULogViewer Real-time Log [v2.0+].
- Windows Event Logs (Application) [Windows].
- Windows Event Logs (System) [Windows].
- Windows Event Logs (Secutiry) [Windows].
- Windows Event Logs (Setup) [Windows].
You can also create, copy or export your own log profiles according to your requirement.
Log filtering is the most important feature in ULogViewer which helps you to find and analyze the problem from logs. You can filter logs by:
- Text filter described by regular expression.
- Level(Priority) of log.
- Process ID of log if available.
- Thread ID of log if available.
For text filter, you can also predefine some filters you may use frequently and filter logs by cobination of these text filters.
When viewing logs, you can mark some logs with different colors which are important for you. There is a separated side panel to list all marked logs to help you to jump to marked log quickly. Marked logs will be kept if you are viewing logs from files so that you don't need to mark them again when you open log files next time.
Except for log filtering, you can also define rule sets or write scripts to analyze logs. Log analysis runs in background separately and generate results to a separated side panel. Currently there are 3 type of log analysis are supported:
-
Key Log Analysis
Find log with specific text pattern and level. You can extract information from log and put it to the result message.
-
Operation Duration Analysis
Find operation marked by specific starting and ending logs and calculate the duration of it. You can extract information from log and put it to the result message.
-
Log Analysis Script
Write script to analyze logs according to your requirement completely.