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GoogleContainerTools/jib

Build optimized Docker and OCI container images for Java applications with Maven or Gradle, without a Docker daemon.

Open-source alternative to:Dockerfile

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What is it?

Jib is a container image build tool for Java applications. It runs as a plugin for Maven and Gradle, or as a Java library, and produces Docker and OCI images directly from the build without requiring a Dockerfile or a local Docker daemon. Images can be pushed to any registry.

Jib splits an application into multiple layers, separating dependencies from compiled classes, so that a code change only rebuilds and redeploys the layers that changed. Builds are reproducible: rebuilding with the same contents yields the same image. The project also provides Jib Core, a general-purpose image-building library for Java, and a command-line interface built on it.

The project includes examples for plain Java, Spring Boot, Micronaut and multi-module projects. It is also documented for use with Google Cloud Build.

Key features

  • 01Builds Docker and OCI images without a Docker daemon or Dockerfile.
  • 02Plugins for Maven and Gradle, plus a Java library and CLI.
  • 03Splits dependencies and classes into separate layers for faster incremental builds.
  • 04Produces reproducible images from identical inputs.
  • 05Pushes images to any registry.

Use cases

  • Containerizing Spring Boot or Micronaut services in a Maven or Gradle build.
  • Building images in CI pipelines without installing Docker.
  • Integrating image builds into Google Cloud Build workflows.

Topics

#java#containers#docker#oci#maven#gradle#kubernetes#docker-registry#gradle-plugin#jib

FAQ

What is jib?
Build optimized Docker and OCI container images for Java applications with Maven or Gradle, without a Docker daemon. Jib is a container image build tool for Java applications. It runs as a plugin for Maven and Gradle, or as a Java library, and produces Docker and OCI images directly from the build without requiring a Dockerfile or a local Docker daemon. Images can be pushed to any registry.
Is jib free to use? What license does it have?
jib is open source under the Apache-2.0 license. Check the license terms before using it in commercial products.
Is jib still maintained?
Actively maintained. The last commit to jib was on Oct 16, 2026.
What can I use jib for?
Containerizing Spring Boot or Micronaut services in a Maven or Gradle build. Building images in CI pipelines without installing Docker. Integrating image builds into Google Cloud Build workflows.
Where can I get jib?
The source code and installation instructions are on GitHub: https://github.com/GoogleContainerTools/jib

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