Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Code Transpilers

TeaVM vs Google Web Toolkit

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score TeaVM #5 in Code Transpilers 8.6/10 Free plan Free plan✓ 2 of 4 features Visit TeaVM
Google Web Toolkit #6 in Code Transpilers 8.5/10 Free plan Free plan✓ 2 of 4 features Visit GWT

TeaVM 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 scoreTeaVM · 8.6/10
  • Free planboth

TeaVM scores higher on our rubric for code transpilers: 8.6 against 8.5 out of 10; our editors rank them #5 and #6.

TeaVM is the better fit for java teams targeting JavaScript or WebAssembly. Google Web Toolkit is the better fit for java teams building browser applications.

  • TeaVM fits best

    Java teams targeting JavaScript or WebAssembly

  • 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 TeaVM 8.6/10 Visit ↗ Google Web Toolkit 8.5/10 Visit ↗
At a glance
Editor score 8.6 8.5
Ranking #5 in Code Transpilers #6 in Code Transpilers
Best for Java teams targeting JavaScript or WebAssembly Java teams building browser applications
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted
Support Email, Docs Community, Docs
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features TeaVM 2/4 · Google Web Toolkit 2/4
Syntax-version conversion Not checked yet Not checked yet
Intermediate output Not checked yet Not checked yet
CLI access ✓ ✓
API access ✓ ✓
Specs
Source languages Not checked yet Not checked yet
Target languages Not checked yet Not checked yet
Conversion mode Source-to-source Source-to-source
Our review
Pros
  • Compiles Java bytecode to JavaScript and Java or Kotlin to WebAssembly GC
  • Maven and Gradle integration with JavaScript interoperability
  • Includes source maps, debugging, development servers, and browser testing
  • Compiles client-side Java into optimized JavaScript
  • Includes Java APIs, UI widgets and JsInterop
  • Offers code splitting, debugging modes and JUnit testing
Cons
  • Works within TeaVM’s supported Java API constraints
  • Focused on new web applications and selected code reuse, not every Java workload
  • Requires self-hosted deployment
  • 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

TeaVM is an open-source ahead-of-time compiler for Java, Kotlin, and Scala developers who want to build web front ends or reuse selected backend code in browser applications. It compiles Java bytecode to JavaScript, supports Java and…

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. TeaVMCode Transpilers 8.6Free plan
  2. Google Web ToolkitCode Transpilers 8.5Free plan

Strengths and trade-offs

  • TeaVM — where it wins

    • Compiles Java bytecode to JavaScript and Java or Kotlin to WebAssembly GC
    • Maven and Gradle integration with JavaScript interoperability
    • Includes source maps, debugging, development servers, and browser testing

    Where it doesn't

    • Works within TeaVM’s supported Java API constraints
    • Focused on new web applications and selected code reuse, not every Java workload
    • Requires self-hosted deployment

  • 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
  • TeaVM8.6/10 · Free plan

    A free, open-source compiler for Java teams building browser applications or native targets.

    Visit TeaVMFull 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