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OpenGrok Logo.png
Developer(s) Sun Microsystems/Oracle Corporation
Stable release
1.0 / April 1, 2017 (2017-04-01)
Written in Java
Operating system Cross-platform
Type Indexer and cross-referencer with Revision control
License CDDL

OpenGrok is a source code search and cross reference engine. It helps programmers to search, cross-reference and navigate source code trees.

It can understand various program file formats and version control histories like Monotone, SCCS, RCS, CVS, Subversion, Mercurial, Git, Clearcase, Perforce and Bazaar.[1]

The name comes from the term grok, a jargon term used in computing to mean "profoundly understand". The term grok originated in a science fiction novel by Robert A. Heinlein called Stranger in a Strange Land.

OpenGrok is being developed mainly by Oracle Corporation (former Sun Microsystems) engineers with help from its community. OpenGrok is released under the terms of the Common Development and Distribution License (CDDL).


OpenGrok's features include:

  • Full text Search
  • Definition Search
  • Identifier Search
  • Path search
  • History Search
  • Shows matching lines
  • Hierarchical Search
  • query syntax like AND, OR, field:
  • Incremental update
  • Syntax highlighting-Xref
  • Quick navigation inside the file
  • Interface for SCM
  • Usable URLs
  • Individual file download
  • Changes at directory level
  • Multi language support

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