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Spring Initializr

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Spring Initializr's own site

What Spring Initializr is

Spring Initializr is a free, open-source generator for JVM-based projects. It supports Java, Kotlin, and Groovy, with Apache Maven and Gradle build options. Project metadata can set dependencies and supported JVM and platform versions. The web service provides endpoints to generate projects and return metadata for third-party clients. Documented clients include the Spring Boot CLI, cURL, HTTPie, Spring Tool Suite, IntelliJ IDEA Ultimate, NetBeans, and VS Code. Spring Tools also integrates Initializr and Spring Guides to help create Spring Boot apps from supported coding environments. The service can be customized with its own metadata and project conventions; documentation covers deploying a custom service with the initializr-web module and Spring Boot, or using Initializr jars as application libraries. The project is released under the Apache 2.0 license. Its repository describes it as pre-1.0, with major refactoring still possible. The repository also says the custom web UI is intended for the project’s own use and is not engineered for easy extension. The contribution guide directs general usage questions to Stack Overflow or Gitter.

Who it suits

Spring Initializr suits developers who want to generate JVM projects with chosen languages, build systems, dependencies, and platform settings. Teams can also use its documented customization and deployment options to create a tailored service.

What it does well

  • Supports Java, Kotlin, and Groovy.
  • Offers Maven and Gradle project generation.
  • Endpoints provide projects and metadata.
  • Custom metadata and project conventions are supported.
  • Documented clients include IDEs and command-line tools.

What to know first

  • The repository describes the project as pre-1.0.
  • Major refactoring is still possible.
  • Its custom web UI is not designed for easy extension.

Plans

PlanBilled and limitsPrice
Spring InitializrOpen source under Apache 2.0 licenseFree

As start.spring.io lists them, read 7 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open https://start.spring.io/ to use the web service.
  2. Choose Java, Kotlin, or Groovy and Apache Maven or Gradle for the generated project.
  3. Set project metadata, dependencies, and supported JVM or platform versions.
  4. Use a documented client such as the Spring Boot CLI, cURL, HTTPie, or a supported IDE.
  5. For a custom service, use Initializr jars as libraries or deploy initializr-web with Spring Boot.

Verdict

Spring Initializr offers a flexible way to generate JVM projects, with API access, documented clients, and options for custom services. Its pre-1.0 status and limited extensibility of the included web UI matter if you plan to build on it.

Questions

How much does Spring Initializr cost?

Its listed plan is free. It is open source under the Apache 2.0 license.

Which languages and build systems does it support?

The generator supports Java, Kotlin, and Groovy, with Apache Maven and Gradle implementations.

Can it be used from IDEs or the command line?

Documented clients include the Spring Boot CLI, Spring Tool Suite, IntelliJ IDEA Ultimate, NetBeans, VS Code, cURL, and HTTPie.

Can a team run a customized Initializr service?

Yes. The service can use custom metadata and project conventions; documentation describes using Initializr jars in an application or deploying with initializr-web and Spring Boot.

Is Spring Initializr open source?

Yes. It is released under the Apache 2.0 license.

Facts from Spring Initializr's own pages

Build systems
The generator includes implementations for Apache Maven and Gradle. · github.com, 7 Oct 2026
Customization
Its metadata model lets an instance configure dependencies and supported JVM and platform versions. · github.com, 7 Oct 2026
Deployment
The documentation describes deploying a custom service using the initializr-web module with Spring Boot. · github.com, 7 Oct 2026
Integrations
Documented clients include the Spring Boot CLI, cURL, HTTPie, Spring Tool Suite, IntelliJ IDEA Ultimate, NetBeans, and VS Code. · github.com, 7 Oct 2026
Languages
The generator supports Java, Kotlin, and Groovy. · github.com, 7 Oct 2026
Notable limit
The start.spring.io repository says its web UI is for the project’s own purpose and is not particularly engineered to be easily extended. · github.com, 7 Oct 2026
Open source
Spring Initializr is released under the Apache 2.0 license. · github.com, 7 Oct 2026
Pre-1.0 status
The repository README describes Spring Initializr as pre-1.0 and says major refactoring is still possible. · github.com, 7 Oct 2026
Project generation API
Web endpoints generate projects and serve metadata for third-party clients. · github.com, 7 Oct 2026
Project options
Project metadata can configure dependencies and supported JVM and platform versions. · github.com, 7 Oct 2026
Purpose
Spring Initializr provides an extensible API to generate JVM-based projects. · github.com, 7 Oct 2026
Security
The Initializr project is released under the Apache 2.0 license; the opened project pages did not state security certifications or compliance claims. · github.com, 7 Oct 2026
Security policy
The GitHub repository links to a security policy, but the opened page does not state specific security or compliance assurances. · github.com, 7 Oct 2026
Self-hosting
The documentation says you can create your own Initializr service by using its jars as libraries in your application. · docs.spring.io, 7 Oct 2026
Spring Tools
Spring Tools integrates Spring Initializr and Spring Guides to help create a Spring Boot app from supported coding environments. · spring.io, 7 Oct 2026
Support
The project contribution guide directs general usage questions to Stack Overflow or the Gitter channel. · github.com, 7 Oct 2026
UI reuse
The start.spring.io repository says its custom web UI is intended for its own use and is not engineered to be easily extended. · github.com, 7 Oct 2026
Web endpoints
The service exposes endpoints to generate projects and provide metadata to third-party clients. · github.com, 7 Oct 2026

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