Plagiarism: Unicheck Plagiarism Checker Plugin

Maintained by unicheckBen Larson, Picture of Aleksandr KostylevAleksandr Kostylev, Picture of Ivan KlymenkoIvan Klymenko
Designed based on educators’ feedback, Unicheck is a plagiarism detection engine helping educators spot plagiarism. To start using the app, please register at or get in touch with the sales team at It takes a few minutes to set-up your account and get the ball rolling. This plugin integrates with assignment, forum and workshop activities in Moodle to check user-submitted content for plagiarism.
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Current versions available: 2

Please note: To use this plugin you must purchase a subscription from Unicheck plagiarism checker. Unicheck has been previously known as Unplag.

What you will find inside Unicheck service and Plugin

Remarkable User Experience

Start checking right away, no special setup is required

There’s a two step registration at Unicheck. Submit your request at and have your corporate account validated within a few hours. Fund your account. Install the Unicheck plugin. Keep in touch with your customer manager to clarify all doubts or discuss further cooperation.

Numerous text file formats

Unicheck supports the most popular file formats: docx, doc, dotx, dot, xlsx, xls, csv, pptx, ppt, pdf, htm, html, xml, txt, rtf, odt, ods, odp, Apple Pages, ZIP, RAR, MATLAB files (.m).

Initial file formatting is retained

In plagiarism reports Unicheck keeps document formatting unchanged without transforming tables, graphs, citations, images, etc.

Easy-to-interpret scan results

Each unoriginal passage or sentence is highlighted. Thus, you will quickly find those text parts which need to be worked over by students repeatedly and which need proper referencing.

Similarity sources with spotted duplications

Once a similarity check is performed, you can view a full list of links to the sources where duplications were detected. Similarities are spotted on each original source. This way you will be able to notice even the smallest text fonts fast no matter how many pages the source has.

Similarity reports can be downloaded in .pdf

You can view similarity check results both online and offline. For the latter, you will just need to click the “Download Report” icon. As a result, you will get a .pdf report with links to the sources with spotted text matches. Based on the report, you can easily provide feedback to your students saying what exactly should be corrected.

Checks available in multiple languages

Currently Unicheck can scan for similarities in English, Spanish, German, French, Russian and Ukrainian. Should you need to scan student works in any other language, just let our help desk know and we will make it available for you.

Personal account manager

Every institution with a one/three-year Unicheck software license has a personal account manager. This is the person you can always rely on whatever questions you might have working with the Unicheck plagiarism detection engine.

Custom development

Since Unicheck is a software development company we can develop custom functionality for your university. For this contact our Sales team and inform them about the features or options you might require.

Comprehensive Plagiarism Check

Fast student papers’ checks

The fewer the number of pages in a student work is, the quicker it will be scanned for similarities by Unplag. Generally, you will receive check results right away. It will take from several seconds to a few minutes. Though a file size will influence the check speed, since Unicheck carefully analyzes each text to provide you with accurate results.

Scan against online sources in real time

To deliver precise check results, Unicheck scans against numerous web sources indexed by Yahoo and Bing in real time.

Providing only relevant check results

Scanning online in real time, Unicheck generates only actual check results. Should an online source be removed, blocked or outdated, it won’t appear in the list of sources where Unicheck found similarities.

Thorough text analysis

From now on Unicheck is able to detect even 4-word similarities. If you don’t need to have student papers analyzed so thoroughly, make use of the option available in each instructor’s account: omit the sources with a similarity percentage less than five.

Check against the library

This extra-useful feature allows instructors and account managers to run checks against the entire account library. It includes all the files uploaded by the account manager, instructors and students. Thanks to this you will be able to compare students’ originality rate across different subjects.

Instant and secure connection to your institution database

Check student writings against a vast academic papers database of your educational establishment. All the technical issues will be tackled by the IT specialists of your university together with Unicheck. As a rule, connecting our checker to your database will take from one day to two weeks.

Identifying citations and references

Unicheck automatically spots citations and references in the most commonly used formats: APA, MLA, Harvard, Chicago, and Turabian. All of them are highlighted and can be omitted from the plagiarism search and report. When excluded, similarity percentage is recalculated at once, so that you can receive more precise similarity rate.

Detecting character replacement

To pass a plagiarism check successfully some students may resort to substituting characters by the similar ones from other alphabets. Unicheck can spot these changes and show which letters were replaced and what sources were copied by cheaters.

Fair Policy

Free trial accounts

Unicheck enables educators to try out its plagiarism detection service for free before signing a license agreement or any other service contracts. We give you three weeks of the entire system trial to make your own judgments.

Disabling the “Sharing files” option

Unicheck doesn’t copy or store your files unless you would like to do it voluntarily. To do this, you need to activate the “Sharing files” option in your personal account settings.

Teacher/Department/Campus/Institution scalability

If your entire college or university is not ready to use Unicheck as the official plagiarism detection tool, you are free to start using it within one campus or department. It’s up to you what to choose.

Access to the new functionality by default

Whenever the Unicheck production team upgrades Unicheck functionality, all registered corporate clients will immediately get access to the updated features at no extra cost.


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Ben Larson (Lead maintainer)
Picture of Aleksandr Kostylev
Aleksandr Kostylev: Developers Team Lead
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  • Picture of Plugins bot
    Fri, Sep 8, 2017, 7:00 PM
    Approval issue created: CONTRIB-7037
  • Picture of Jolie Kulsar
    Sun, Apr 22, 2018, 11:39 PM
    Will this plug in detect course hero documents
  • Picture of Ivan Klymenko
    Mon, Apr 23, 2018, 3:50 PM
    Hi Jolie, I'm a Product Manager at Unicheck. Yes, we will check the course hero documents. Please, keep in mind that this applies to "open content", a content which is accessible on the web-site without login/password. Coursehero and some other sites disallow vendors to scan documents which are "hidden" behind the login.
  • Picture of lourdes cid
    Wed, Oct 31, 2018, 9:31 PM
    Hello, is it unicheck capable of detecting plagiarism between works uploaded within the Moodle platform or just compares with the web?
  • Picture of Ivan Klymenko
    Thu, Nov 1, 2018, 12:30 AM
    Hello @lourdes cid, yes, Unicheck plugin detects similarity with works uploaded by students within the Moodle platform. It also checks Forum posts and Workshop assignments. Besides, you can check uploaded submissions in real-time one by one or all submitted work at once. In addition, Unicheck compares against a Unicheck database (private DB for every institution). Admin and instructors can contribute new content to this private database.
  • Picture of Terri Roshell
    Sun, Apr 7, 2019, 8:41 PM
    Is there a way to check only against documents within my Moodle site?
  • Picture of Ivan Klymenko
    Tue, Apr 9, 2019, 12:32 AM
    Hi Terri, Unicheck can check any random document if you have an account. All institutions who use Moodle plugin have Unicheck Admin account which allows that - for admin and instructors.
  • Picture of Tony Okazaki
    Fri, Mar 6, 2020, 10:16 PM
    Thanks for sharing this i was looking for it
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