Compile JAR and CLASS files into standalone executables. Escape and lifetime analysis decide exactly when every object can be freed — like Rust, on top of Java, Kotlin, Scala, or Groovy.
Built for developers who want compiled-language performance without leaving the JVM ecosystem.
Bytecode is translated to SSA IR, analyzed, and lowered to LLVM. The executable starts instantly — no interpreter, no JIT, no class-loading overhead.
Interprocedural points-to and escape analysis classify every allocation site. Destructors are inserted at last use — deterministic cleanup without a garbage collector.
Heap-escaped values are paired with null-outs so overwrite instrumentation cannot double-free. Shutdown cleanup uses a claim stack to break cycles safely.
Plain JARs, directories, single CLASS files, and Spring Boot fat JARs — with lazy nested-JAR indexing and on-demand class loading.
Target triples for x86-64, AArch64, RISC-V, POWER, s390x, ARMv7, and i686. Override with --target and --data-layout.
Reads reflect-config.json, proxy-config.json, jni-config.json, and resource-config.json under META-INF/native-image/.
Build a native executable from a JAR in one command.
# Inspect a JAR
java -jar jnative.jar inspect app.jar
# Build a native executable (entry inferred from Main-Class)
java -jar jnative.jar analyze app.jar
# Choose entry, output, and dump analysis results
java -jar jnative.jar analyze app.jar \
--entry com.example.Main \
--output myapp \
--alias --escape --lifetime --destructor
# Cross-compile for Windows
java -jar jnative.jar analyze app.jar \
--target x86_64-pc-windows-msvc \
-O3
# Generate LLVM IR without compiling
java -jar jnative.jar analyze app.jar \
--entry com.example.Main \
--no-compileAuto-detected from os.name / os.arch, or explicit via --target.
| Family | Example Triples |
|---|---|
| x86-64 | x86_64-pc-linux-gnu x86_64-pc-windows-msvc x86_64-apple-darwin |
| AArch64 / arm64 | aarch64-unknown-linux-gnu arm64-apple-darwin aarch64-pc-windows-msvc |
| i686 | i686-pc-linux-gnu i686-pc-windows-msvc |
| RISC-V | riscv64-unknown-linux-gnu |
| POWER | powerpc64le-unknown-linux-gnu powerpc64-unknown-linux-gnu |
| s390x | s390x-ibm-linux-gnu |
| ARMv7 | armv7-unknown-linux-gnueabihf |
Every allocation site is classified at compile time. The runtime acts on that classification.
Does not escape its defining function. Eligible for stack allocation or full scalar replacement.
Stored in another object’s field. A destructor is inserted at last use, and the containing field is nulled.
Returned to the caller; the caller owns it. No cleanup inside the defining function.
Reachable from a static field. Released during the cycle-safe shutdown pass.
Handed to another thread. Not released per-use; lifetime is managed by the receiving thread.
The analysis cannot classify the site. Cleanup is handled conservatively.