Blazing fast Rust-based JavaScript bundler with Rollup-compatible API and esbuild feature parity.
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299 reviews trackedThe Bottom Line
Entry price
Free, no paid tier
Biggest pro
Rust-based bundler
Biggest con
Very new
TL;DR - Rolldown
- Rust-based JavaScript bundler for blazing fast performance.
- Offers Rollup-compatible API and esbuild feature parity.
- Designed for Vite 8+ and handles large module counts efficiently.
Pricing: Free forever
Best for: Individuals & startups
4.4/5 across review platforms
What is Rolldown?
Rolldown is a high-performance JavaScript bundler built with Rust, designed to offer a significantly faster alternative to existing bundlers. It provides a Rollup-compatible API, allowing developers to leverage a familiar interface and a rich plugin ecosystem. Additionally, Rolldown achieves feature parity with esbuild, incorporating built-in transforms, define, inject, minification, and CSS bundling capabilities.
This bundler is particularly well-suited for projects requiring rapid build times, especially those with a large number of modules. It's engineered to handle tens of thousands of modules efficiently, as demonstrated by benchmarks showing superior performance compared to esbuild, rspack, and Rollup + esbuild combinations. Rolldown is also explicitly designed to power Vite 8+ as its unified bundler, making it an excellent choice for Vite users seeking enhanced build performance.
Rolldown is free and open-source, supported by a dedicated full-time team and community contributors, making it accessible for all developers looking to optimize their JavaScript bundling process.
Available on: Web
Pros & Cons
Pros
- Rust-based bundler
- Rollup compatible
- Fast performance
- Active development
- Vite integration
Cons
- Very new
- Not production ready
- Limited ecosystem
- Still developing
- Documentation sparse
Ratings Across the Web
4.4(299 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
Rust-based bundlerRollup compatibleFast buildsTree shakingES modulesPlugin support
Pricing Plans
Pricing checked Jul 10, 2026
Free
Free
- Open source (MIT)
- Rollup-compatible API
- 10-30x faster than Rollup
- Rust-based bundler
Reviews
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4.4/5
Across 299 verified user reviews on Capterra, SourceForge
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Rolldown FAQ
How does Rolldown improve build times for large JavaScript projects?
Rolldown is a Rust-based bundler engineered for high performance, specifically designed to handle projects with tens of thousands of modules efficiently. Benchmarks demonstrate its superior performance compared to other bundlers, leading to significantly faster build times.
Which teams would benefit most from using Rolldown?
Teams working on projects that require rapid build times and have a large number of modules would benefit most from Rolldown. It is also an excellent choice for Vite users, as it is designed to power Vite 8+ as its unified bundler.
How does Rolldown compare to esbuild in terms of features?
Rolldown achieves feature parity with esbuild, incorporating built-in transforms, define, inject, minification, and CSS bundling capabilities. This allows developers to leverage a familiar set of functionalities while benefiting from Rolldown's performance advantages.
What kind of limitations should users be aware of when considering Rolldown?
Users should be aware that Rolldown is a very new tool and is not yet considered production-ready. Its ecosystem is still limited, and the documentation is currently sparse as it continues to develop.
How is Rolldown priced?
Rolldown is free and open-source, making it accessible for all developers without requiring any paid plans. It is supported by a dedicated full-time team and community contributors.
Can Rolldown integrate with existing Rollup plugins?
Yes, Rolldown provides a Rollup-compatible API, which allows developers to leverage a familiar interface and a rich plugin ecosystem. This compatibility helps in integrating with existing Rollup plugins.
Does Rolldown offer built-in transformations and optimizations?
Yes, Rolldown includes built-in transforms, define, inject, and minification capabilities. It also supports CSS bundling, providing a comprehensive set of features for optimizing JavaScript projects.
Source: rolldown.rs