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A round up of guides, help articles, and frequently asked questions.

A Solution for Any Industry

Download the guides to discover how iThenticate can help you.



Surface potential plagiarism prior to publication with iThenticate’s expansive content database.

Lower retraction risk



Screen personal essays for potential plagiarism and help ensure the highest level of integrity even before matriculation.

Simplify screening



Ensure the originality of public-facing content, from legal documents to grant applications, and reporting.

Safeguard originality



Prevent disseminating invalid findings, grant misconduct, and introducing improper patient treatment.

Foster integrity

Help articles and guidelines

Search our comprehensive site for the launch, integration, and usage information.


For Administrators

Manage users, apply global settings, run reports, and more.

View admin guides
For Users Icon

For Users

Getting started, creating folders, uploading submissions, settings, and the Similarity Report.

View user guides
For Developers

For Developers

Documentation for Shibboleth Single Sign-On support and API guidance for integrations with Manuscript Tracking Systems (MTS)

View developer guides

iThenticate FAQs

Find the answers to the commonly asked questions about how iThenticate works.

What are the main benefits of iThenticate?

iThenticate is the premier tool for researchers and professional writers to check their original works for potential plagiarism. With an easy to use submission process that checks for similarity against the world’s top published works, researchers, and institutions can feel confident that their academic reputation will be protected.

Only iThenticate is embedded into top publisher’s workflow and process. Through our trusted partnership with Crossref, 1,500 publishers license iThenticate and rely on it to check for plagiarism when screening and reviewing article submissions. Institutions and researchers can feel much more confident about their submission and acceptance chances, knowing that by using iThenticate they have the same data and information as the publisher.

Can iThenticate be used by Admissions Offices?

Yes. For Admissions offices, iThenticate has an easy to use submission process that checks incoming application documents (essays, short answers, letters of recommendation, etc) for similarity against the world’s top published works and a repository of more than 90 billion current and archived web pages. The written portions of the application packet are the most subjective and take the most time to review, so having a solution that provides a quantifiable metric without increasing the review time helps to protect your reputation while fitting seamlessly into your current application review process.

Against what resources will my manuscript be compared?

iThenticate compares submissions to premium academic content including: premium scholarly journals, books, law reviews, patents, dissertations & theses, pre-prints, conference proceedings, and internet pages. Learn more about our constantly growing database of content.

If desired, a private repository can be established to store your documents. Administrators can choose whether storing to the private repository is enabled for all users. Every user can choose to store their uploaded document into the private repository. The private repository can be searched against to discover text similarity across the items uploaded at your institution. This can be valuable in detecting research misconduct including self plagiarism.

What are common uses for iThenticate during research projects?
  • Review grant proposals to discover any overlap in content or intent prior to submitting the proposal to secure necessary funding
  • Do a literature review to discover and evaluate the work already present in the field. Discover authors and journals that might be a good fit as you begin your research
  • Continuously review manuscript drafts to identify and resolve any citation errors
  • Collaborate with co-authors, peers, or editors as the manuscript is reviewed and revised
  • Ensure that the final work, whether grant proposal, dissertation/thesis, or journal article protects the author and institution’s reputation
What are common uses for iThenticate with admissions applications?
  • Screen written responses on incoming applications for potential plagiarism
  • Share written responses with the admissions team or departmental reviewers
  • Review written work in more detail to evaluate text matches
  • Examine international documents for content that might be plagiarised
  • Compare a document to up to 5 other documents
  • Ensure that applicants that are granted admission fit the academic standards held by your organization
  • Confirm the work of meritorious scholarship recipients
  • Defer suspicion by providing a quantitative metric to one of the most subjective portions of the application process
  • Reduce risk and protect your institutional brand without increasing staff workload and continuing to save time throughout the admission review process
Is there a user manual or instructions for using iThenticate?
How do I submit a document?

There are a variety of ways to submit a document: Upload a single file, Upload a compressed zip file (may contain up to 1000 files, or 100MB), or Cut & Paste text. For complete instructions, visit our help pages.

What are the document submission requirements?

The file may not exceed 800 pages. The file size may not exceed 100 MB. The word count of one submission should not exceed 25,000 words. Files of larger size may be reduced in size by removal of non-text content. Files that are password protected, encrypted, hidden, system files, or read only files cannot be uploaded or submitted to iThenticate.

The zip file upload accepts up to 1000 files or 200MB of zipped information. A zip file to be uploaded may not exceed either limit. Zip files should be checked to ensure only usable file formats are included in the upload.

What File Types can be uploaded to iThenticate?
  • Microsoft Word® (DOC and DOCX)
  • Word XML
  • Plain Text (TXT)
  • Adobe PostScript®
  • Portable Document Format (PDF) created with Adobe or Microsoft Word
  • HTML
  • Corel WordPerfect® (WPD)
  • Rich Text Format (RTF)
What are the system requirements?
  • Microsoft® Windows® 7+, Mac OS X v10.4.11+
  • 3GB of RAM or more
  • 1024x768 display or higher
  • Broadband internet connection
  • We support the latest and one previous version of Chrome, Firefox, Safari, and Windows browsers.
  • Internet browser set to allow all cookies from
  • Javascript enabled
What languages does iThenticate support?

The iThenticate interface currently supports the following languages: English, Korean, Japanese, German, Spanish Latin American, Brazilian Portuguese, Dutch, Italian, French, Simplified and Traditional Chinese, and Arabic.

Which international languages does iThenticate have content for in its database?

iThenticate searches for content matches in over 170 languages including Chinese (simplified and traditional), Japanese, Thai, Korean, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Hungarian, Italian, Norwegian (Bokmal, Nynorsk), Polish, Portuguese, Romanian, Serbian, Slovak, Slovenian, Spanish, Swedish, Arabic, Greek, Hebrew, Farsi, Russian, and Turkish. Please note that iThenticate will match text between text of the same language.

Where can I find information about iThenticate's system status?

View the system status page:

Individual Edition
How do I get started?

To check for plagiarism, first, create a free account. Second, purchase credits so that you can submit a file to iThenticate. Credits are displayed at the top right of the screen. Once you have credits, click "Submit Document" to start the plagiarism check. Watch the demo

What types of documents and files are best checked by the individual edition?

Single documents, including: articles for newspapers, magazines, and other publications; research documents; proposals (for grants, government or non-profit); manuscripts; essays; business reports; articles; financial analysis; PhD theses and Masters dissertations.

Can I submit two documents for comparison?

Yes, iThenticate offers document-to-document comparison via an optional private document repository. This functionality may be enabled as part of iThenticate’s annual licensing edition. Please contact us for more details.

Are my submissions to iThenticate kept private?

Yes. Submissions are added to a private, secure database that is only accessible by your own account. Unlike many free plagiarism checker services, iThenticate does not share or resell uploaded files. Your submissions are not searchable by any other account, nor used by any other Turnitin service.

Can I delete my submissions from iThenticate?

Yes. You may delete your submissions from your account at any time. Deleted submissions will be moved to your Trash folder and permanently removed from the iThenticate database once you click "Delete" in your Trash folder.

What is the maximum size of a document?

A single credit can be used to upload a file up to 25,000 words in length, which accommodates the average length of a research paper. If your document is longer, you can purchase multiple credits. If using the zip file upload method, all files contained in a zip file are extracted and uploaded one by one. Each one will be considered a separate upload and will use up a single credit even if the 25,000 words are not fully used, the remaining words do not roll over.

What is a revision?

A revision is when you submit a manuscript that you have already uploaded to iThenticate and you have either revised it or added more material to it and want to check your manuscript again. Revision will not use up a new credit in case the revised document remains 60% the same.

How many times can I submit a manuscript for a plagiarism check?

After you submit your document once, you may resubmit it a maximum of five times without using additional credits (revision option). If your revised manuscript is substantially different (40%+ difference) than the original submission, iThenticate will ask you to use a new credit and submit this document as a new manuscript.

Can editors see my Similarity Report?

No. iThenticate gives you your own personal account so that you can check for plagiarism privately. This means that no one can access it but you. If you would like to share your report, you can download a PDF version to print or email.

What do iThenticate reports highlight?

iThenticate identifies material that matches text from documents found in our extensive database. Highlighted text will include text that has been properly quoted and cited so it is not necessarily plagiarized. You will need to verify that every highlighted section has been properly quoted, summarized or paraphrased. As a result, iThenticate makes it easier for you to identify and attribute any material that may contain unintentional plagiarism.

How long will I have to wait until my results are ready?

Results are usually delivered within one minute to several minutes, depending on document length.

How will I know if my results are ready?

While this analysis is in progress, you will see the word "pending" in the report column next to the title of your manuscript. When your results are ready, you will see a percentage, or "Similarity Index" in the report column next to the title of your manuscript.

How do I see my results?

To see your results, click the "Similarity Report" icon in the report column next to the title of your manuscript.

What does the percentage mean?

The results include a percentage score, called a "Similarity Score", which indicates how much of the document matches other sources. Please note that iThenticate does not determine whether a manuscript contains plagiarism. The service identifies content in a submitted manuscript that matches other sources, primarily to encourage the author of the manuscript to check that other sources have been properly cited. Watch a demo

What do the highlighted boxes mean?

The results include number-coded and color-coded highlighting of parts of the manuscript that correspond to matching sources in the iThenticate database. You are encouraged to look carefully at these sections to determine whether other sources have been properly cited.

Partners & Integrations
What is Crossref Similarity Check powered by iThenticate?

Crossref Similarity Check powered by iThenticate is a trusted partnership between Crossref, a publisher association, and iThenticate plagiarism technology.

What is CORE?

CORE is the world's largest collection of open access repository metadata. Through our partnership with CORE, we are able to identify and index top academic content from open access repositories to include in our content database.

What Manuscript Tracking Systems does iThenticate have integrations with?

iThenticate has strong integrations with a very large range of manuscript tracking systems (MTS) used by publishers today, including eJournal Press, Editorial Manager, ScholarOne, Open Journal System (OJS), and many more. iThenticate also has a REST API that may be utilized. Please contact us for more details.