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Unicheck

Unicheck
Type of site
Plagiarism and Similar Content Checker
OwnerTurnitin
URLunicheck.com
CommercialYes
Current statusActive

Unicheck (previously known as Unplag) is a cloud-based plagiarism checking software. It finds similar text and can also detect citations and references in documents.

Unicheck is used in K-12 and higher education. It can also be used by individual users, such as writers, editors, bloggers, and lawyers.[1]

History

Unicheck was made by IT company Phase One Karma and launched in 2014 under the name Unplag.

In 2016, Unicheck partnered with the XСulture project and became a Certified Partner with the Canvas learning management system by Instructure.[2] In 2017 it gained a status of Canvas Alliance Partner.[3]

In 2017, Unicheck added an integration with Google Classroom.[4] It later added a “native” Canvas integration that uses LTI and API. In January 2018, Unicheck released an add-on for Google Docs.[5]

In 2020, Unicheck (made by Phase One Karma) was acquired by Turnitin.[6] Unicheck continued to operate as a separate service.

What it does

Unicheck checks text and shows where similar text is found. The results are shown in a similarity report. Each match includes a link to the source. Reports can be downloaded as PDF files.

Unicheck can be used as a stand-alone tool. It can also be connected to a learning management system (LMS) using a plug-in, LTI, an API, or both.

Unicheck can check many file formats, including .doc, .docx, .rtf, .txt, .odt, .ppt, .pptx, .html, .pdf, and files from Google Drive, OneDrive, and Dropbox.[7] Users can also store documents in an internal library and choose whether checked documents are shared with Unicheck's database.[7]

Technology

Unicheck uses an algorithm to search for similar text on web pages, in open source repositories, and in a user’s internal library. Some papers describe parts of its approach, including methods used for authorship attribution and paraphrase detection.[8][9]

Unicheck can also identify properly formatted citations and references in common styles such as APA, MLA, and Chicago.

References

  1. ↑ Huffman, Justin (7 August 2015). "How Lawyers Fight Plagiarism". Guardian Liberty Voice. Retrieved 2026-03-02.
  2. ↑ korzh, Alisa. "Unicheck Launches Deep Integration With Canvas LMS - eLearning Industry". eLearning Industry. Retrieved 2017-11-03.
  3. ↑ "Alliance Partner - Unicheck | Canvas Community". community.canvaslms.com. Retrieved 2026-03-02.[permanent dead link]
  4. ↑ "Plagiarism Checker Unicheck And Google Classroom Integration". Unicheck Blog. 2017-06-23. Retrieved 2026-03-02.
  5. ↑ "Unicheck Similarity Checker Add-On for Google Docs". Unicheck Blog. 2018-02-09. Retrieved 2026-03-02.
  6. ↑ Ross, John (29 April 2021). "Academics fret as Turnitin nears monopoly on plagiarism checks". Times Higer Education. Retrieved 2026-03-02.[permanent dead link]
  7. ↑ 7.0 7.1 Horvath, Brian (24 August 2015). "Get Higher Content Quality With These Three Tools". Business 2 Community. Archived from the original on 2019-04-18. Retrieved 2026-03-02.
  8. ↑ Marchenko, Oleksandr; Anisimov, Anatoly; Nykonenko, Andrii; Rossada, Tetiana; Melnikov, Egor (2017-06-21). "Authorship Attribution System". Natural Language Processing and Information Systems. Lecture Notes in Computer Science. Vol. 10260. Springer, Cham. pp. 227–231. doi:10.1007/978-3-319-59569-6_27. ISBN 9783319595689.
  9. ↑ Marchenko, Oleksandr; Anisimov, Anatoly; Nykonenko, Andrii; Rossada, Tetiana; Melnikov, Egor (2017-06-21). "Machine Learning Method for Paraphrase Identification". Flexible Query Answering Systems. Lecture Notes in Computer Science. Vol. 10333. Springer, Cham. pp. 164–173. doi:10.1007/978-3-319-59692-1_14. ISBN 9783319596914.

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