JavaScript engine optimized for React Native

Faster App Launch

Hermes-powered apps launch faster, thanks to build-time precompilation of JavaScript into efficient bytecode.

Optimized for Mobile

Hermes is small in APK size, lean on memory, and starts instantly. It won't weigh your app down.

Easy Integration

It's simple to get started with Hermes in React Native apps. Hermes is open source and implements JavaScript standards.