A: If D8 fails, it is usually due to improper bytecode in dependencies. Check the error log for specific class file issues. Conclusion
Inside, you will see folders named after specific version numbers (e.g., 30.0.3 , 33.0.0 , or 34.0.0 ). Open the latest version folder available. Step 3: Extract d8.jar from the lib Directory
Downloading from unofficial sources risks malware or version mismatches.
D8 automatically transforms Java 8 bytecode into Java 7/6 compatible bytecode during the DEX compilation process. This happens as part of the D8/R8 compilation of class files into DEX code.
This is easier than handling d8.jar directly.
Download the package matching your OS (Windows, Mac, or Linux).
It is important to understand that d8 is often packaged alongside r8.jar . While d8 is the compiler that converts bytecode to DEX, is the shrinking, minification, and obfuscation tool that replaces ProGuard.
Need the absolute latest version? Check the official R8 releases (the upstream project for d8) at https://r8.googlesource.com/r8 – but note those are not “official Android SDK” builds.
java -jar d8.jar --release --output out/ input.jar
Once you have downloaded or located d8.jar , you can run it using the Java Runtime Environment (JRE). Ensure you have Java 8 or higher installed on your system. Basic Syntax
