Modern JDK 25
Virtual threads, pattern matching, ZGC — all the latest features.
JDK 25 with no setup
Host your .jar in seconds. Ready environment with OpenJDK 25 — ideal for Spring Boot, Quarkus, and Micronaut.
Why run on Square Cloud
Everything optimized, production-ready.
Upload your JAR directly
No Maven/Gradle on the server — build locally, Square runs it.
Kotlin, Scala, Clojure, Groovy
Any JVM language packaged as fat JAR works.
Customizable JVM
Configure flags via START= (e.g. java -Xms256m -Xmx900m -jar app.jar).
Ideal use cases
Where this runtime shines on our platform.
Spring Boot and Quarkus APIs
REST, GraphQL, and gRPC with virtual threads, low latency, and optimized startup.
Java Discord bots
24/7 hosting for JDA, Discord4J, and Javacord bots in isolated containers.
JVM microservices in production
Typed communication with gRPC, Protobuf, and async messaging at enterprise scale.
Server-side Kotlin applications
Modern backends with Ktor, Spring + Kotlin, and coroutines-first architecture in production.
Lavalink servers for music bots
Standalone Lavalink with YouTube, SoundCloud, and Spotify support, connecting Discord bots via WebSocket.
Enterprise batch processing
Spring Batch, Quartz Scheduler jobs, and ETL data pipelines on robust JVM environments.
Available versions
Pick the track that best fits your project.
Current version
25
Single stable toolchain
Technical specs
Everything you need to configure your app.
- Accepted extensions
.jarpom.xmlbuild.gradlebuild.gradle.kts- Dependency file
- Not required
- RUNTIME= aliases
java
Minimal config
Create a squarecloud.app file at your project root:
squarecloud.appJava
MEMORY=512
DISPLAY_NAME=Meu App
VERSION=recommended
MAIN=app.jarA plan for every stage of your project
Start small and scale when you need to, with no loyalty contracts.
Tier 3ISO 27001SOC 2 Type IIAlways-On DDoS Protection
Explore our infrastructureFrequently asked questions about Java Hosting
JDK 25, fat JAR, Spring Boot, and Lavalink servers.