Rspack

Summary

Rspack is a free, open-source bundler for web projects, built with Rust and TypeScript. Its parallelized architecture supports parallel builds, while incremental compilation is used to improve hot module replacement. Rspack updates the webpack API with the aim of supporting webpack replacement, but does not promise complete API compatibility; it focuses on commonly used APIs and adds others based on user needs. It works with almost all community loaders, and over 85% of the 50 most downloaded webpack plugins can be used with Rspack or have an alternative. Built-in capabilities include code splitting, tree shaking, asset management, a development server, SWC, Lightning CSS, and a JavaScript build API. Documented integrations cover React, React Server Components, Preact, Vue, Next.js, Node.js applications, NestJS, Solid, Svelte, and Rstest. Custom plugins and loaders can be written in JavaScript or Rust. Rspack 1.0 was released in August 2024 and is described by the project as production-ready. The software is released under the MIT license; questions can be directed to its Discord support channel or GitHub Discussions.

Who it is for

Rspack suits web developers looking for a bundler with webpack-oriented APIs, Rust and TypeScript implementation, and framework integrations. It also fits teams that want to write custom plugins or loaders in JavaScript or Rust.

Compared on JavaScript build tools

Free plan

Yesrspack.rs

TypeScript support

Yesrspack.rs

Code splitting

Yesrspack.rs

Tree shaking

Yesrspack.rs

Source maps

Yesrspack.rs

Plugin API

Yesrspack.rs

Facts

Purpose

Rspack is a fast Rust-based bundler for the web that modernizes the webpack API to support replacing webpack.rspack.rs · 3 Oct 2026

Architecture

Rspack combines Rust and TypeScript with a parallelized architecture.rspack.rs · 3 Oct 2026

Hot module replacement

Rspack uses incremental compilation to optimize hot module replacement performance.rspack.rs · 3 Oct 2026

Webpack ecosystem

Rspack is compatible with almost all community loaders, and over 85% of the 50 most downloaded webpack plugins can be used with Rspack or have an alternative.rspack.rs · 3 Oct 2026

Compatibility limit

Rspack does not aim for full webpack API compatibility; it prioritizes commonly used APIs and adds others based on user needs.rspack.rs · 3 Oct 2026

Built-in features

The homepage lists code splitting, tree shaking, asset management, a dev server, parallel builds, SWC, Lightning CSS, and a JavaScript build API.rspack.rs · 3 Oct 2026

Framework integrations

The documentation lists integrations for React, React Server Components, Preact, Vue, Next.js, Node.js applications, NestJS, Solid, Svelte, and Rstest.rspack.rs · 3 Oct 2026

Plugin and loader development

Custom plugins and loaders can be developed in JavaScript or Rust.rspack.rs · 3 Oct 2026

Release status

The introduction says Rspack 1.0 was released in August 2024 and describes it as production-ready because it covers most webpack APIs and features.rspack.rs · 3 Oct 2026

Support

The project directs users with questions to its Discord support channel or GitHub Discussions.rspack.rs · 3 Oct 2026

Security-related feature

The community plugin compatibility list includes a SubresourceIntegrityPlugin for output and assets.rspack.rs · 3 Oct 2026

Maintainer

The Rstack development team is led by ByteDance's web infrastructure team and works with community contributors on Rspack and related projects.rspack.rs · 3 Oct 2026

License

Rspack is free and open source software released under the MIT license.rspack.rs · 3 Oct 2026

Where it ranks on Everything Xiaomi

• Best JavaScript Build Tools in 2026#4 of 27

Sources

• rspack.rs/guide/start/introduction· checked 3 Oct 2026
• rspack.rs· checked 3 Oct 2026
• rspack.rs/misc/faq· checked 3 Oct 2026
• rspack.rs/contribute/· checked 3 Oct 2026
• rspack.rs/plugins/community-plugin-compatibility· checked 3 Oct 2026
• rspack.rs/misc/team/core-team· checked 3 Oct 2026