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An Open Source XMPP Client Library written in Java for JVMs and Android
Pull request Compare This branch is 2 commits behind igniterealtime:master.
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config Add checkstyle rule for StringBuilder.append(char)
documentation Couple of fixes in
resources Smack 4.1.6
smack-android-extensions Merge tag '4.1.2'
smack-android Add FinalClass checkstyle check
smack-bosh SASL Proxy Auth support
smack-compression-jzlib Add JavadocPackage checkstyle
smack-core Fix a couple of javadoc warnings
smack-debug-slf4j Bump jxmpp to 0.5.0-alpha4
smack-debug Bump jxmpp to 0.5.0-alpha4
smack-experimental Improve StringUtils.escapeForXml()
smack-extensions Pass down Message stanza in ChatStateListener
smack-im Fix typo in RosterEntries
smack-integration-test Remove unnecessary code to enable stream mangement
smack-java7 Add errorprone check and fix found errors
smack-jingle-old Make XMPPError imutable and add stanza reference
smack-legacy Improve StringUtils.escapeForXml()
smack-resolver-dnsjava Add JavadocPackage checkstyle
smack-resolver-javax Add JavadocPackage checkstyle
smack-resolver-minidns Add JavadocPackage checkstyle
smack-sasl-javax SASL Proxy Auth support
smack-sasl-provided Merge tag '4.1.6'
smack-tcp Check callbackHandler/keystorePath for null
.gitignore Re-implementing the vCard provider using a pull parser. Extended unit…
.travis.yml travis-ci: Use gradle 2.7
LICENSE Add LICENSE README: Add #smack IRC badge from kiwiirc
build.gradle Use Add JavadocPackage checkstyle
settings.gradle Add Integration Test Framework
version.gradle Smack 4.2.0-alpha4-SNAPSHOT


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Instructions how to use Smack in your Java or Android project are provided in the Smack 4.1 Readme and Upgrade Guide.


Smack is an open source, cross-platform, easy to use, Java XMPP client library.

A pure Java library, it can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations such as sending notification messages and presence-enabling devices. Smack and XMPP allows you to easily exchange data, in various ways e.g. fire-and-forget, publish-subscribe, between human and non-human endpoints.

Confused? Have a look at the Overview.

Smack - an Ignite Realtime community project.

Bug Reporting

Only a few users have access for for filling bugs in the tracker. New users should:

  1. Read "How to ask for help or report an issue"
  2. Create a forums account (only e-mail is a requirement, you can skip all the other fields).
  3. Login to the forum account
  4. Press New in your toolbar and choose Discussion
  5. Choose the Smack Developers Forum of Smack and add the tag 'bug_report' to your new post

Please search for your issues in the bug tracker before reporting.


The developers hang around in #smack (freenode, IRC) and (XMPP MUC room). Remember that it may take some time (~hours) to get a response.

You can also reach us via the Smack Users Forum if you have questions or need support, or the Smack Developers Forum if you want to discuss Smack development.


If you want to start developing for Smack and eventually contribute code back, then please have a look at the Guidelines for Smack Developers and Contributors. The guidelines also contain development quickstart instructions.



If you find Smack useful and feel like donating, then you can use one of the following systems:

Ignite Realtime

Ignite Realtime is an Open Source community composed of end-users and developers around the world who are interested in applying innovative, open-standards-based Real Time Collaboration to their businesses and organizations. We're aimed at disrupting proprietary, non-open standards-based systems and invite you to participate in what's already one of the biggest and most active Open Source communities.

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