flutter_rust_bridge
A feature-rich, seamless binding generator for calling Rust code from Flutter/Dart and vice versa.
What is flutter_rust_bridge?
Flutter Rust Bridge is a binding generator that automatically creates glue code to call Rust functions from Flutter/Dart applications and vice versa. It solves the problem of integrating high-performance Rust libraries or algorithms into Flutter's cross-platform UI, enabling developers to leverage Rust's speed and safety without manual FFI boilerplate.
Flutter developers who need to incorporate high-performance Rust code (e.g., for algorithms, data-intensive operations, or existing Rust libraries) into their mobile or desktop apps, and Rust developers seeking a UI framework for their Rust systems.
It offers a seamless, feature-rich integration with support for arbitrary types, async/await, two-way calls, and cross-platform compatibility, all while being officially recognized as a Flutter Favorite package with a strong focus on safety and developer experience.
Overview
Flutter/Dart <-> Rust binding generator, feature-rich, but seamless and simple.
Use Cases
Best For
- Adding high-performance Rust algorithms or data processing to Flutter apps
- Using existing Rust crates (libraries) in a Flutter/Dart project
- Building Flutter UI frontends for Rust-based systems or backends
- Writing CPU-intensive or multi-threaded code in Rust for Flutter mobile apps
- Creating cross-platform apps that require both a rich UI and native performance
- Integrating Rust's memory safety and reliability into Flutter development workflows
Not Ideal For
- Projects building simple UI apps without performance-critical backend logic
- Teams lacking Rust expertise and unwilling to invest in learning the language
- Rapid prototyping where Flutter's Dart ecosystem alone is sufficient for MVP
- Apps requiring frequent hot-reload cycles without Rust compilation overhead
Pros & Cons
Pros
Officially recognized as a Flutter Favorite package, ensuring high quality, community trust, and alignment with Flutter best practices, as noted in the README.
Handles complex Rust and Dart types like enums, structs, streams, and errors without manual serialization, enabling natural code writing as demonstrated in the examples.
Supports async Rust, sync Rust, async Dart, and sync Dart interoperability, plus Rust-to-Dart callbacks, allowing flexible and non-blocking integration.
Works on Android, iOS, Windows, Linux, macOS, and Web, providing broad platform support for combining Rust and Flutter in diverse environments.
Cons
Key features like parsing third-party packages and lifetimes are labeled experimental in the README, which may lead to instability or breaking changes in production use.
Requires proficiency in both Rust and Flutter/Dart, increasing the learning curve and toolchain setup overhead compared to single-language solutions.
Relies on generated glue code that must be regenerated on API changes, adding a build step and potential for integration issues if not managed carefully.
Frequently Asked Questions
Related Projects
TauriBuild smaller, faster, and more secure desktop and mobile applications with a web frontend.
DioxusFullstack app framework for web, desktop, and mobile.
icedA cross-platform GUI library for Rust, inspired by Elm
eguiegui: an easy-to-use immediate mode GUI in Rust that runs on both web and native
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