Apache Log4j

Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist deployment for various use cases. It is part of the Apache Logging Services project. Log4j is a Java library distributed as Maven artifacts and is consumed via its Java API rather than over the network; no public HTTP/REST surface is published.

2 APIs 0 Features

ApacheDebuggingJavaLibraryLoggingMonitoringOpen Source

APIs

Log4j API

The logging facade providing a feature-rich Java interface for application logging. Applications code against this stable API while delegating to a backing implementation such a...

Log4j Core

The reference implementation of the Log4j API providing appenders, layouts, filters, lookups and configuration that route log events to consoles, files, databases, network endpo...

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Log4J Plans Pricing

3 plans

PLANS

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Log4J Rate Limits

5 limits

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Log4J Finops

FINOPS

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Sources

aid: log4j
name: Apache Log4j
description: Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation,
  and components to assist deployment for various use cases. It is part of the Apache Logging Services project. Log4j is a
  Java library distributed as Maven artifacts and is consumed via its Java API rather than over the network; no public HTTP/REST
  surface is published.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Apache
- Debugging
- Java
- Library
- Logging
- Monitoring
- Open Source
url: https://raw.githubusercontent.com/api-evangelist/log4j/refs/heads/main/apis.yml
created: '2024-01-15'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: log4j:log4j-api
  name: Log4j API
  description: The logging facade providing a feature-rich Java interface for application logging. Applications code against
    this stable API while delegating to a backing implementation such as Log4j Core.
  humanURL: https://logging.apache.org/log4j/2.x/manual/api.html
  tags:
  - API
  - Facade
  - Java
  - Logging
  properties:
  - type: Documentation
    url: https://logging.apache.org/log4j/2.x/manual/api.html
  - type: Reference
    url: https://logging.apache.org/log4j/2.x/javadoc.html
  - type: SourceCode
    url: https://github.com/apache/logging-log4j2
- aid: log4j:log4j-core
  name: Log4j Core
  description: The reference implementation of the Log4j API providing appenders, layouts, filters, lookups and configuration
    that route log events to consoles, files, databases, network endpoints and more.
  humanURL: https://logging.apache.org/log4j/2.x/manual/configuration.html
  tags:
  - Core
  - Implementation
  - Java
  - Logging
  properties:
  - type: Documentation
    url: https://logging.apache.org/log4j/2.x/manual/configuration.html
  - type: Reference
    url: https://logging.apache.org/log4j/2.x/javadoc.html
  - type: SourceCode
    url: https://github.com/apache/logging-log4j2
common:
- type: Website
  url: https://logging.apache.org/log4j/2.x/
- type: Documentation
  url: https://logging.apache.org/log4j/2.x/manual/
- type: GettingStarted
  url: https://logging.apache.org/log4j/2.x/manual/getting-started.html
- type: Security
  url: https://logging.apache.org/security.html
- type: ReleaseNotes
  url: https://logging.apache.org/log4j/2.x/release-notes.html
- type: Performance
  url: https://logging.apache.org/log4j/2.x/performance.html
- type: SourceCode
  url: https://github.com/apache/logging-log4j2
- type: License
  url: https://www.apache.org/licenses/LICENSE-2.0
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com