Seq — centralized structured logs for .NET, Java, Node.js

Application logs are the most useful data available for detecting and solving a wide range of production issues and outages. Seq makes it easier to pinpoint the events and patterns in application behavior that show your system is working correctly — or why it isn’t.

Seq is built for modern structured logging with message templates. Rather than waste time and effort trying to extract data from plain-text logs with fragile log parsing, the properties associated with each log event are captured and sent to Seq in a clean JSON format. Message templates are supported natively by ASP.NET CoreSerilogNLog, and many other libraries, so your application can use the best available diagnostic logging for your platform.

Seq accepts logs via HTTPGELFcustom inputs, and the seqcli command-line client, with plug-ins or integrations available for .NET Core, Java, Node.js, Python, Ruby, Go, Docker, message queues, and many other technologies.

Free for development and single-user deployment
The free single-user license included with Seq lets developers run Seq locally, and now supports individual developers in production.

Source: Seq — centralized structured logs for .NET, Java, Node.js

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