# Eclipse RAP

Java widget toolkit for browser-based user interfaces with an SWT API, from the Eclipse Foundation.


Source: https://findsoftware.frbit.cloud/eclipse-rap/
Last reviewed: 2026-10-26
Listed since: 2026-10-26

## Record

### Links

- home: https://www.eclipse.org/rap/
- repository: https://github.com/eclipse-rap/org.eclipse.rap
- docs: https://www.eclipse.org/rap/developers-guide/
- x: https://twitter.com/EclipseRAP/
- forum: https://www.eclipse.org/forums/eclipse.technology.rap

### Identity

- status: active
- maintainer: Eclipse Foundation AISBL
- maintainerType: foundation
- parent: unknown
- firstRelease: 2007
- hqCountry: BE

### Kind

- category: ui-library
- hosting: java
- language: java
- runtime: jvm
- runtimeMin: unknown
- basedOn: unknown

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: always-on
- renderingModes: not applicable
- installMethod: Eclipse IDE target platform, or RWT as a standalone Java library copied into WEB-INF/lib

### License

- licenseModel: open-source
- license: EPL-1.0

### Releases

- currentMajor: 4
- latestReleaseDate: 2026-09-09

### Adoption

- githubStargazers: 30
- packagistDownloads: not applicable
- npmWeeklyDownloads: not applicable
- contributors: 32
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: unknown
- dependentPackages: unknown

### Sources

- urls: https://www.eclipse.org/rap/ (read 2026-10-26)
- urls: https://api.github.com/repos/eclipse-rap/org.eclipse.rap (read 2026-10-26)
- urls: https://www.eclipse.org/rap/developers-guide/ (read 2026-10-26)
- maintainer: https://www.eclipse.org/legal/termsofuse.php (read 2026-10-26)
- hqCountry: https://www.eclipse.org/org/foundation/contact.php (read 2026-10-26)
- language: https://api.github.com/repos/eclipse-rap/org.eclipse.rap (read 2026-10-26)
- runtime: https://www.eclipse.org/rap/ (read 2026-10-26)
- category: https://www.eclipse.org/rap/ (read 2026-10-26)
- installMethod: https://www.eclipse.org/rap/developers-guide/rwt-standalone.html (read 2026-10-26)
- runsAs: https://www.eclipse.org/rap/ (read 2026-10-26)
- license: https://github.com/eclipse-rap/org.eclipse.rap/blob/main/README.md (read 2026-10-26)
- licenseModel: https://github.com/eclipse-rap/org.eclipse.rap/blob/main/README.md (read 2026-10-26)
- firstRelease: https://eclipsesource.com/blogs/2026/06/21/eclipse-rap-20th-anniversary/ (read 2026-10-26)
- currentMajor: https://repo1.maven.org/maven2/org/eclipse/rap/org.eclipse.rap.rwt/maven-metadata.xml (read 2026-10-26)
- latestReleaseDate: https://api.github.com/repos/eclipse-rap/org.eclipse.rap/git/tags/b66d4f456ddc45257cf5b0c31a3e4184ed79c4e6 (read 2026-10-26)
- githubStargazers: https://api.github.com/repos/eclipse-rap/org.eclipse.rap (read 2026-10-26)
- contributors: https://api.github.com/repos/eclipse-rap/org.eclipse.rap/contributors (read 2026-10-26)

## Notes

Eclipse RAP, the Remote Application Platform, lets a developer write a browser user interface in Java against an SWT-style API. The project's homepage says RAP works with OSGi and Java EE and runs in any servlet container, and the [developer's guide](https://www.eclipse.org/rap/developers-guide/) describes two setups: an OSGi application built against a RAP target platform in the Eclipse IDE, and RWT used as a plain Java library inside a web application's WEB-INF/lib folder.

The Eclipse Foundation AISBL makes the project available.

## Worth knowing

The default mode is compatible with Java EE. The SWT compatibility mode starts a separate UI thread for each user session, and the developer's guide says code in that thread cannot directly reach Java EE transaction or security contexts.

---

Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0