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Reclazz icon

Reclazz

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Free, open-source hot reload for Java, Spring Boot and SAP Commerce (Hybris) that redefines classes in place on a stock JDK, keeps application state, and needs no restart.

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  • New

Updated

  • Updated Nov 2026

Releases

  • 3 releases last year3 last year

Platforms

  • JetBrains IDE
  • IntelliJ IDEA
  • Java
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  •  2 Stars
  •  1 Forks
  •  13 Open Issues
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Reclazz was added to AlternativeTo by Onur-Kat on and this page was last updated .

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What is Reclazz?

Reclazz is a free, open-source (Apache 2.0) hot-reload tool for JVM applications, with first-class support for Spring Boot and SAP Commerce (Hybris). You edit Java code and build; the running JVM picks up the change without a restart, and application state survives.

Unlike an approach that needs a patched JVM, Reclazz performs common structural changes (adding and removing methods and instance fields, changing annotations, adding many Spring beans, listeners and scheduled or security-annotated methods after startup) on a stock JDK 17 or newer. On SAP Commerce it goes beyond Java: saving an items.xml or beans.xml runs the platform's own code generation and reloads the regenerated model and DTO classes, interceptors re-register, and properties, log levels and ImpEx on save are supported.

There is no telemetry, no analytics and no outbound network request; the one socket the agent opens is bound to loopback. The source is public, so every claim can be verified.