Configurable logger for Go
Clear logging for Go applications
Readable console output, JSON records, contextual fields, and error traces without extra framework work.
Why Logy
Logy brings together the things Go applications usually assemble around their logger: names, fields, handlers, formats, package rules, and errors.
Named, package, and typed loggers
Create package, named, or typed loggers for the part of the application that produced each record.
Contextual fields
Attach request, trace, tenant, user, or job values through context without changing every log call.
Structured logging
Keep level, logger, message, fields, and errors as record data before choosing console or JSON output.
Multiple destinations
Send records to console, files, syslog, or custom handlers with destination-specific rules.
Fast
Keep logging lightweight on the hot path while still preserving useful fields and logger metadata.
Console and JSON output
Use readable console logs during development and structured JSON records in production.
Latest updates
Notes from Logy
Logging notes, release updates, and implementation context as Logy grows.
Introducing Logy
A configurable logger for Go applications that need named loggers, contextual fields, handlers, and JSON output.
Read updateReadable logs and structured output
How Logy keeps development console output and structured production records close together.
Read updateFAQ
Common questions
A few practical answers about where Logy fits and how its output model works.
Why use Logy instead of the standard logger?+
Logy keeps simple log calls, but adds named loggers, contextual fields, handlers, and production-friendly output when an application needs more structure.
Does structured logging mean JSON only?+
No. Log records can stay structured as level, logger, message, fields, and errors before a handler formats them for console output, JSON, or another destination.
Can Logy fit into an existing Go application?+
Yes. Logy is designed to start small, so packages can adopt named loggers, fields, and handlers gradually without changing the whole application at once.
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