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Helenos is a web based GUI Cassandra client that helps you to explore data and manage your schema.

Current version







CF properties CQL Browse

Click here for preview on Youtube


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  • Authentication
  • Listing keyspaces and column families
  • Viewing properties of above
  • Add / remove / truncate column family
  • Add / Drop keyspace
  • Data browsing via:
    • keyRange
    • predicate
  • CQL support


  • Make sure that a user account which your application server runs as, has write permission to home directory
  • Download war package and deploy to your servlet container (tested with Jetty 8, Tomcat 6, Resin 4)
  • When running on Resin, additionally make sure that fileServlet is enabled and configured (see web.xml or Resin manual)
  • Start app
  • Make sure your web browser supports Flash 10
  • Open your web browser to http://localhost:8080/{yourdeploypath}/index.html
  • Sign in with your credentials (default is admin:admin)
  • Edit your connections by clicking icon in upper right corner
  • After editing click button 'Connect to'

Building manually

You can build manually with Maven but first install all prerequisities:

Next download this package: and unpack to directory src/main/frontend/contribs and change destination folder name to 'dialog'. Next apply patch file 'src/main/frontent/Dialog.js.patch'.

Wish list

  • Browse with indexed columns
  • Results pagination and export to file
  • Manually setting serializers
  • Persisting default filter criteria to reuse at anytime
  • JMX monitor


  • I see a cluster structure in a left pane but how to do anything more !? - Use the force Luke ...I mean right mouse button
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