SWC

swc.rs

Rust-based super-fast compiler for JavaScript and TypeScript used in Next.js and bundlers.

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Devtool

Overview

SWC (Speedy Web Compiler) is an extensible Rust-based platform designed for next-generation developer tools. It's used by major projects like Next.js, Parcel, and Deno, as well as companies including Vercel, ByteDance, Tencent, Shopify, and Trip.com.

The tool handles both compilation and bundling of JavaScript and TypeScript files, transforming modern JavaScript syntax into code compatible with all major browsers. SWC is significantly faster than traditional tools—20x faster than Babel on a single thread and 70x faster on four cores.

SWC supports compilation, minification, WebAssembly transformations, integration with webpack and Rspack, Jest performance improvements, and custom plugins, making it highly extensible for various use cases.

Key features

  • Rust-based for speed
  • JavaScript/TypeScript compilation
  • Minification support
  • WebAssembly transformations
  • webpack and Rspack integration
  • Jest performance improvements
  • Custom plugin support
  • Multi-platform binaries
Pros
  • 20x faster than Babel on single thread
  • 70x faster on four cores
  • Extensible architecture
  • Wide adoption by major tools and companies
  • Multi-platform binary support
  • Can be used as pre-built binary or built from source
Cons
  • Requires learning Rust for custom plugin development
  • Smaller ecosystem compared to Babel
  • Documentation may be less comprehensive than established alternatives
Use this if
You need a fast, modern JavaScript/TypeScript compiler for production builds, want to replace Babel with a Rust-based alternative, or are building tools that require high-performance code transformation.
Skip this if
You require extensive community plugins and integrations beyond the core feature set, or prefer tools with commercial support options.

Best for

JavaScript/TypeScript compilationHigh-performance bundlingNext.js and modern web toolingReplacing Babel in build pipelinesMinification and code transformationCustom plugin development

Alternatives

BabelesbuildTerserTypeScript compiler (tsc)

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