Side by side

Google Web Toolkit vs JSweet

Both stand on code transpilers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Google Web Toolkit

Free plan ExtensionLinuxMac+2

GWT combines Java development with browser-oriented compilation and a set of documented development tools. Developers should note the deprecated webAppCreator utility and the periodic timestamp and version telemetry.

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JSweet

Free plan Open source AndroidAPIiPhone+5

JSweet gives Java developers a route to JavaScript output while working with JavaScript libraries and tools. Its setup requires several development tools, and its focus is specifically source conversion from Java.

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The facts

	Google Web Toolkit	JSweet
Free plan	Yes	Yes
Open source	Not published	Yes
Runs on	Extension, Linux, Mac, Web, Windows	Android, API, iPhone, Linux, Mac, Self-hosted, Web, Windows
Lowest paid plan	Free or on request	Free or on request
Plans published	1	1
Maker	Not published	Not published
Website	gwtproject.org	jsweet.org
On code transpilers	#4 of 28	#1 of 28

Google Web Toolkit: what it does well

Free under the Apache 2.0 license.
Compiles Java applications into JavaScript and HTML.
Supports asynchronous communication through GWT RPC or JSON.
Eclipse plugin offers IDE and SDK support.
Documentation includes testing and security guidance.

What to know first

webAppCreator is deprecated starting with version 2.11.0.
Development mode and compiler periodically send product data to Google.
Version 2.13.1 lists Windows, Mac OS X, and Linux.

JSweet: what it does well

Generates type-checked JavaScript
Supports over 1,000 JavaScript libraries and plugins
Plugins available for Eclipse, Maven, and Gradle
Browser debugging mode for Java code

What to know first

Getting started requires Git, Node.js, and Maven
Focused on Java-to-TypeScript and JavaScript conversion

Alternatives to Google Web Toolkit Alternatives to JSweet The whole list