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Rolldown

Rust-powered JavaScript bundler for Vite

open sourceverified Aug 24, 2026

Rolldown is a high-performance JavaScript and TypeScript bundler written in Rust, built as the next-generation bundler for Vite. Created by Evan You and VoidZero, it offers a Rollup-compatible plugin API with 10-30x faster builds. It combines esbuild-level speed with full Rollup ecosystem compatibility, supporting tree-shaking, code splitting, and advanced optimizations natively. With 13K+ stars and MIT license, it is set to become the default bundler for Vite 8.

Rolldown is a next-generation JavaScript and TypeScript bundler written in Rust by Evan You and the VoidZero team. Designed as the future bundler powering Vite, Rolldown aims to replace both esbuild and Rollup in the Vite toolchain by unifying the dev and production build pipeline into a single, blazing-fast tool. It achieves 10-30x faster build performance compared to Rollup while maintaining full compatibility with Rollup's plugin API and ecosystem, allowing existing projects to migrate with minimal friction.

The project introduces several technical innovations including parallel module parsing, efficient scope hoisting, and a Rust-native tree-shaking algorithm that eliminates dead code more aggressively than its JavaScript counterparts. Rolldown supports advanced code splitting strategies, dynamic imports, and CSS bundling out of the box. Its architecture is built on top of Oxc, another VoidZero project providing a high-performance JavaScript parser and transformer, creating a tightly integrated toolchain where each layer benefits from shared Rust infrastructure.

With over 13,000 GitHub stars and active daily development, Rolldown reached its 1.0 RC milestone and is on track to ship as the default bundler in Vite 8. The project is MIT-licensed and backed by VoidZero Inc., which raised funding specifically to build a unified, open-source JavaScript toolchain. For teams already using Vite, adopting Rolldown means dramatically faster builds without changing their existing plugin setup or configuration.

Pricing

Free and 100% open source under the MIT License. Rolldown is completely free with no licensing fees, usage tiers, or enterprise locks. It serves as the unified next-generation Rust bundler for Vite and standard JavaScript/TypeScript applications.

full pricing breakdown →

Platforms

npm package, cross-platform (macOS, Linux, Windows)

Categories

Tags

Use Cases

esbuild logo

esbuild

Ultra-fast JavaScript bundler written in Go

esbuild is a JavaScript bundler written in Go with 38K+ GitHub stars that runs 10-100x faster than traditional bundlers like Webpack. Handles JavaScript, TypeScript, JSX, CSS bundling, and minification with near-instant build times. Used as the build engine inside Vite for production builds. Features tree shaking, code splitting, source maps, and a plugin API. Minimal configuration required — most projects need zero config files. Single binary with no JavaScript dependencies.

Open Source
Vite logo

Vite

Next-generation frontend build tool

Vite is the de facto standard frontend build tool with 72K+ GitHub stars, created by Evan You. Provides instant dev server startup using native ES modules, lightning-fast hot module replacement that stays fast regardless of project size, and optimized production builds via Rollup. Supports React, Vue, Svelte, Preact, and vanilla JS/TS out of the box with a rich plugin ecosystem. Achieves 98% developer satisfaction and has become the recommended tooling for most modern frameworks.

Open Source
SWC logo

SWC

Super-fast Rust-based JavaScript compiler

SWC is a super-fast JavaScript and TypeScript compiler written in Rust that serves as a drop-in replacement for Babel. It compiles modern JavaScript and TypeScript to backward-compatible versions up to 20x faster than Babel by leveraging Rust performance and parallelism. SWC handles JSX transformation, TypeScript stripping, module transpilation, and minification in a single tool, and powers major frameworks including Next.js, Parcel, and Deno.

Open Source

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FAQ

What is Rolldown?

Rolldown is a high-performance JavaScript and TypeScript bundler written in Rust, built as the next-generation bundler for Vite. Created by Evan You and VoidZero, it offers a Rollup-compatible plugin API with 10-30x faster builds. It combines esbuild-level speed with full Rollup ecosystem compatibility, supporting tree-shaking, code splitting, and advanced optimizations natively. With 13K+ stars and MIT license, it is set to become the default bundler for Vite 8.

Is Rolldown free?

Yes — Rolldown is open source and free to use. Free and 100% open source under the MIT License. Rolldown is completely free with no licensing fees, usage tiers, or enterprise locks. It serves as the unified next-generation Rust bundler for Vite and standard JavaScript/TypeScript applications.

Is Rolldown open source?

Yes — Rolldown is open source.

Is Rolldown still maintained?

Yes — Rolldown is active. Its listing was last verified on August 24, 2026.

What are the best Rolldown alternatives?

The top editor-verified Rolldown alternatives are esbuild, Vite, SWC.