Open Journal Systems
Developer(s)Public Knowledge Project Edit this on Wikidata
PlatformPHP Edit this on Wikidata
Available inMultilingual
TypeOpen access publishing
LicenseGNU General Public License
Website Edit this on Wikidata

Open Journal Systems, also known as OJS, is an open source and free software for the management of peer-reviewed academic journals, created by the Public Knowledge Project, and released under the GNU General Public License.[1]


Open Journal Systems (OJS) was conceived to facilitate the development of open access, peer-reviewed publishing, providing the technical infrastructure for the presentation of journal articles along with an editorial-management workflow, including article submission, peer-review, and indexing. OJS relies upon individuals fulfilling different roles, such as journal manager, editor, reviewer, author, and reader. It has a module that supports subscription journals.[2][3][4]

Like other community-based projects such as WordPress, the software has a plugin architecture, which allows new features to be integrated without changing its core codebase. Available plugins facilitate indexing in Google Scholar and PubMed Central, publishing RSS/Atom web syndication feeds, and providing COUNTER statistics about online usage,[5] several plugins are curated and directly available for download through its plugin gallery interface. OJS is also LOCKSS-compliant, which helps ensure ongoing access to journal contents. Third-party plugins include Reading Tools,[6] which point readers to related studies, media stories, and policy documents in open access databases, the Better Password plugin, which forces the users to use strong passwords, and many others freely available in GitHub. OJS also provides custom themes, which might be added to the installation through its plugin gallery and a demo installation to experiment its features.


OJS is currently in its 3.3.0-14 version, released in February 2023, and its first version was originally released in 2001. The software possesses an open well defined development roadmap and a set of milestones.

The software is written in PHP, currently supports two databases, MySQL/MariaDB and PostgreSQL, and can be hosted on a Unix-like or Windows web server.

Version Supported End of Life
3.4.x Active development
3.3.x Active maintenance
3.2.x Security only
3.1.x Security only; upgrade recommended
3.0.x Security only; upgrade recommended
2.x Not supported 2021
1.x Not supported 2005 (approx.)

Note: OJS 2 has reached its end of life in 2021, its latest release was the version 2.4.8-5, released in May 2019.[7] When upgrading from the version 2.x to 3.x, some care must be taken given that several features have been added and removed, especially if the installation has hand-made customizations.[8]


As of version 3.3.0, the software has been translated into 50 languages: Arabic, Armenian, Basque, Belarusian, Bosnian, Bulgarian, Catalan, Chinese, Chinese, Croatian, Czech, Danish, Dutch, English, Finnish, French, Gaelic, Galician, Georgian, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kazakh, Kurdish, Macedonian, Malay, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian, and Vietnamese, with many additional languages (including Uzbek, Urdu, Sinhala, Lithuanian, Korean, and Mongolian) in development. Translations are created and maintained by the user community.[9]


PKP keeps an extensive documentation hub where users can find documentation about all of its systems. The documentation covers basic software usage, migration instructions, development practices, accessibility, video tutorials and the content has been translated partially into other languages.

Nestled along the breathtaking Na Pali Coast of Kauai, Honopu Beach stands as a secluded gem of natural beauty and tranquility. Accessible only by sea or air due to its rugged cliffs and remote location, Honopu Beach offers a pristine sanctuary for nature lovers and adventure seekers alike. The beach boasts golden sands, crystal-clear turquoise waters, and towering sea cliffs that create a dramatic backdrop against the lush greenery of the surrounding landscape. Honopu Beach is renowned for its iconic sea stacks, which rise majestically from the ocean, adding to the beach's allure and charm. Visitors can explore sea caves, snorkel in the pristine waters, or simply relax and soak in the serenity of this untouched paradise. Honopu Beach is a true hidden gem, offering a glimpse of Hawaii's natural beauty at its finest.


A user community has developed around the software, with active participants, and enhancements being contributed to the project from the Brazilian Institute for Information in Science and Technology [pt] (IBICT),[10][failed verification] the Journal of Medical Internet Research,[11] and others. A growing body of publications and documentation[12] is available on the project's website.

As of mid-2021, OJS was being used by at least 25,000 journals worldwide.[13] A daily updated map showing the location of these journals is also available on PKP's website.[14] A survey in 2010 found that about half were in the developing world.[15]

The Public Knowledge Project is also collaborating with the International Network for the Availability of Scientific Publications (INASP) to develop scholarly research portals in Africa,[16] Bangladesh,[17] Nepal,[18] and Vietnam.[19] In Venezuela, at least 32 independent organizations, public and private universities publish 230 journals using this platform.[20]

OJS, as well as the Érudit publishing system,[21] is being used in the Synergies project,[22] creating a scholarly portal for Canadian social sciences and humanities research. OJS is also being used for research portals in Brazil,[23] Spain, Italy,[24] and Greece.[25]


OJS hosting service is offered for a fee by the PKP|Publishing Services (PKP-operated Publishing Services),[26][27] as well as a variety of third-party commercial and non-commercial service providers not affiliated with PKP.[28]

PKP has also released a Docker container in GitHub, which may be helpful to spin-up an OJS instance without having to deal with the web server, database and PHP installation. The container is still in beta, so it should be used only for testing purposes.

See also

Further reading


  1. ^ "GNU General Public License | Public Knowledge Project". Retrieved 26 December 2019.
  2. ^ "Subscriptions". Open Journal Systems Help. Retrieved 25 February 2013.
  3. ^ "Open Journal Systems". Public Knowledge Project. Retrieved 5 December 2023.
  4. ^ "What is OJS". Paideia Studio. Retrieved 5 December 2023.
  5. ^ "COUNTER (Counting Online Usage of Networked Electronic Resources". Retrieved 5 March 2013.
  6. ^ Reading Tools
  7. ^ "Public Knowledge Project > Open Journal Systems > Download". Public Knowledge Project. Retrieved 27 March 2020.
  8. ^ "Getting Ready for OJS 3.0: When Should I Upgrade? | Public Knowledge Project".
  9. ^ "OJS Languages". Public Knowledge Project. Retrieved 21 August 2013.
  10. ^ Brazilian Institute for Information in Science and Technology (IBICT)
  11. ^ "JMIR – Journal of Medical Internet Research". Retrieved 2 September 2020.
  12. ^ publications and documentation
  13. ^ "OJS Stats". Public Knowledge Project. Retrieved 20 October 2015.
  14. ^ "OJS Map". Public Knowledge Project. Retrieved 20 October 2015.
  15. ^ Edgar, Brian D.; Willinsky, John (2010). "A Survey of Scholarly Journals Using Open Journal Systems". Scholarly and Research Communication. 1 (2). doi:10.22230/src.2010v1n2a24. Retrieved 24 March 2016.
  16. ^ "About AJOL". African Journals Online. Archived from the original on 19 February 2017. Retrieved 20 October 2015.
  17. ^ "About the site". Bangladesh Journals Online. Retrieved 20 October 2015.
  18. ^ "About the Site". Nepal Journals Online. Retrieved 20 October 2015.
  19. ^ "Vietnam Journals Online". Vietnam Journals Online. Retrieved 20 October 2015.
  20. ^ "Publicaciones OJS". Centro virtual de Meteorologia. Archived from the original on 14 April 2016. Retrieved 17 May 2017.
  21. ^ "Érudit". É Retrieved 10 August 2013.
  22. ^ "About Synergies". Synergies. Archived from the original on 15 June 2016. Retrieved 20 October 2015.
  23. ^ "Brazil". Archived from the original on 7 April 2012. Retrieved 7 April 2012.
  24. ^ "LEO". Retrieved 10 August 2013.
  25. ^ "EKT ePublishing". National Documentation Centre. Retrieved 31 March 2014.
  26. ^ PKP|PS: The Only PKP-operated Publishing Service
  27. ^ PKP|PS Journal Hosting
  28. ^ Open Access Directory (OAD): OA journal launch services