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Juxta / Profile

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Juxta is an open-source cross-platform tool for comparing and collating multiple witnesses to a single textual work. The software allows users to set any of the witnesses as the base text, to add or remove witness texts, to switch the base text at will, and to annotate Juxta-revealed comparisons and save the results.

Juxta comes with several kinds of analytic visualizations. The primary collation gives a split frame comparison of a base text with a witness text, along with a display of the digital images from which the base text is derived. Juxta displays a heat map of all textual variants and allows the user to locate – at the level of any textual unit – all witness variations from the base text. A histogram of Juxta collations is particularly useful for long documents. This visualization displays the density of all variation from the base text and serves as a useful finding aid for specific variants. Juxta can also output a lemmatized schedule (in HTML format) of the textual variants in any set of comparisons.

Tool Type

Data Mining

General Associations
data (37), data analysis (37), data mining (33), text (7), textual analysis (11)


Juxta is freeware.



  • attach comments to specific sentences and paragraphs
  • multiple views of document and comments to meet personal preferences
  • 2-Pane: comments accessible but not distracting
  • 1 Pane: all comments, viewable in full, within document
  • Comments only: See comments sorted by date, person, or document sequence
  • Document-only: Just document, no distracting elements whatsoever
  • tagging of comment
  • embedded media players and graphics can be included in documents and commented upon as single objects
  • university infrastructure (courses, instructors, TAs, students)
  • email notification of new messages


Forthcoming Version 3 Features:


  • preservation of rich text formatting in most documents
  • refactored 2-pane interface
  • creation of student subgroups within a class
  • private messaging (at least instructor—> student)
  • enhanced moderation of comments by teachers
  • much faster document uploading and markup
  • tools for school-wide site monitoring by system Admins
  • additional infrastructure to parallel university infrastructure
  • updated HELP files
  • integration with Sakai LMS (authentication/authorization, access, roster use, group awareness)


Features Under Consideration for Later Releases


  • social networking/profile data (coordinate with existing or desired UVA functionality)
  • enhanced notification of new posts (by email or RSS feeds or Facebook)
  • allow multimedia files to be attached to posts
  • guest/auditor roles (view but not post comments)
  • tagging integrated with subject taxonomies
  • granular annotations of images keyed to specific sections of the image
  • granular annotations of audio-video through reliance upon transcripts to simply keying to timecodes
  • enable content to be dynamically delivered to, and embedded within, diverse web sites
  • enable live editing within diverse web sites of Now Comment content


Interface Languages
English (416)