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Head-to-head · Code Transpilers

SWC vs Google Web Toolkit

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score SWC #2 in Code Transpilers 9.2/10 Free plan Free plan✓ 0 of 4 features Visit SWC
Google Web Toolkit #6 in Code Transpilers 8.5/10 Free plan Free plan✓ 2 of 4 features Visit GWT

SWC leads on 0 checks, Google Web Toolkit on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSWC · 9.2/10
  • Free planboth
  • Most featuresGoogle Web Toolkit · 2 of 4

SWC scores higher on our rubric for code transpilers: 9.2 against 8.5 out of 10; our editors rank them #2 and #6.

SWC is the better fit for fast JavaScript and TypeScript build pipelines. Google Web Toolkit is the better fit for java teams building browser applications.

  • SWC fits best

    Fast JavaScript and TypeScript build pipelines

  • Google Web Toolkit fits best

    Java teams building browser applications

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature SWC 9.2/10 Visit ↗ Google Web Toolkit 8.5/10 Visit ↗
At a glance
Editor score 9.2 8.5
Ranking #2 in Code Transpilers #6 in Code Transpilers
Best for Fast JavaScript and TypeScript build pipelines Java teams building browser applications
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted
Platforms Windows, macOS, Linux, Android Web, Windows, macOS, Linux
Support Community, Docs Community, Docs
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features SWC 0/4 · Google Web Toolkit 2/4
Syntax-version conversion Not checked yet Not checked yet
Intermediate output Not checked yet Not checked yet
CLI access Not checked yet ✓ (best)
API access Not checked yet ✓ (best)
Specs
Source languages Not checked yet Not checked yet
Target languages Not checked yet Not checked yet
Conversion mode Not checked yet Source-to-source
Our review
Pros
  • Compiles JavaScript and TypeScript, with minification and source maps
  • Supports tree shaking, dead-code elimination, and shared-dependency chunking
  • Integrates with Next.js, webpack, Rspack, Jest, Parcel, and Deno
  • Compiles client-side Java into optimized JavaScript
  • Includes Java APIs, UI widgets and JsInterop
  • Offers code splitting, debugging modes and JUnit testing
Cons
  • The spack bundler is documented as slated for removal in v2
  • Bundling depends on spack, so its future path warrants attention
  • Support channels are community and documentation
  • Requires Java development for client-side application code
  • Uses a self-hosted SDK rather than a hosted service
  • Support is centered on community resources and documentation
Our verdict

SWC is an open-source, Rust-based compiler and build tool for JavaScript and TypeScript projects. It transforms modern code into browser-compatible output and offers minification, source maps, tree shaking, and bundling through its spack…

Read the review →

Google Web Toolkit is an open-source toolkit for building browser-based applications with client-side Java. Teams write application code in Java and compile it into JavaScript for web browsers. Its intended audience is Java teams that want…

Read the review →
  1. SWCCode Transpilers 9.2Free plan
  2. Google Web ToolkitCode Transpilers 8.5Free plan

Strengths and trade-offs

  • SWC — where it wins

    • Compiles JavaScript and TypeScript, with minification and source maps
    • Supports tree shaking, dead-code elimination, and shared-dependency chunking
    • Integrates with Next.js, webpack, Rspack, Jest, Parcel, and Deno

    Where it doesn't

    • The spack bundler is documented as slated for removal in v2
    • Bundling depends on spack, so its future path warrants attention
    • Support channels are community and documentation

  • Google Web Toolkit — where it wins

    • Compiles client-side Java into optimized JavaScript
    • Includes Java APIs, UI widgets and JsInterop
    • Offers code splitting, debugging modes and JUnit testing

    Where it doesn't

    • Requires Java development for client-side application code
    • Uses a self-hosted SDK rather than a hosted service
    • Support is centered on community resources and documentation
  • SWC9.2/10 · Free plan

    An open-source compiler with minification and bundling for JavaScript and TypeScript workflows.

    Visit SWCFull verdict →
  • Google Web Toolkit8.5/10 · Free plan

    A Java-based route to browser applications, with compilation, widgets and testing tools.

    Visit GWTFull verdict →

More comparisons

All code transpilers comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update