Canvas uses Turnitin and Originality.com to scan for plagiarism and AI-generated content

Canvas, the learning management system used by most colleges and many high schools, does not have its own built-in plagiarism detector. Instead, it integrates with third-party tools — primarily Turnitin and Originality.com — that your school chooses to install. Your instructor decides which tool to use, if any, and whether to turn it on for assignments.

When you submit an essay or document to an assignment in Canvas, the tool scans your text against a database of published works, previously submitted papers, and websites. It also checks for patterns that suggest AI generation — things like unusually consistent sentence structure, specific word choices, or statistical markers that differ from human writing. The tool then produces a report showing what percentage of your work matches existing sources and, in newer versions, a confidence score for AI detection.

Neither tool is perfect. Both can flag human writing as AI-generated and miss AI writing that is carefully edited. Both can also produce false matches on common phrases or properly cited material. Understanding what these tools actually do — and what they cannot do — helps you know what to expect when you submit work.

Key Takeaways

  • Canvas itself does not check for plagiarism or AI use; your school installs Turnitin or Originality.com as an add-on, and your instructor chooses whether to use it.
  • These tools compare your work against published sources, student papers, and websites, then flag matching text and estimate the likelihood of AI generation.
  • AI detection is not foolproof — both tools can incorrectly flag human writing as AI-generated or miss AI text that has been edited or paraphrased.
  • Your instructor sees the report but decides what it means; a high similarity score does not automatically mean you plagiarized, and an AI detection flag does not prove you used AI.

How Turnitin works inside Canvas

Turnitin is the most widely used plagiarism checker in higher education. When your school enables it in Canvas, you will see a "Submit to Turnitin" button or a note that your assignment is linked to Turnitin. When you upload your document, Turnitin stores a copy and compares it against its database, which includes billions of web pages, published articles, books, and student papers submitted over the past two decades.

Within a few minutes to a few hours, Turnitin produces an Originality Report — a document that shows a similarity percentage and highlights sections of your work that match existing sources. The report also includes an AI writing indicator that estimates the likelihood your work was generated by tools like ChatGPT or Claude. Your instructor can see this report and decide whether to accept your work, ask you to revise, or refer you to academic integrity review.

Turnitin does not automatically fail you or report you to your school. It is a detection tool, not a judge. Your instructor interprets the report and decides what action, if any, to take.

How Originality.com works inside Canvas

Originality.com is a newer competitor to Turnitin, built specifically to detect both plagiarism and AI-generated text. It works similarly: you submit your document through Canvas, and the tool scans against web sources, academic databases, and a library of student submissions. The main difference is that Originality.com was designed from the start to flag AI writing, whereas Turnitin added AI detection later.

Originality.com produces a report with a similarity score and an AI detection score. The AI score is expressed as a percentage likelihood that the work was written by an AI tool. Like Turnitin, it does not make a final judgment — your instructor reads the report and decides what it means for your grade or academic standing.

Some schools choose Originality.com because they believe its AI detection is more reliable, though independent testing shows both tools have similar accuracy rates. The choice often comes down to cost and what features your school's administrators prefer.

What these tools actually detect and what they miss

Both Turnitin and Originality.com are good at finding direct copying from websites and published sources. If you paste a paragraph from Wikipedia or a journal article without quotation marks, both tools will catch it. They are also reasonably good at spotting when a student submits a paper written by someone else or purchased from a paper mill.

AI detection is much less reliable. Both tools look for statistical patterns — sentence length variation, word choice distribution, punctuation patterns — that differ from typical human writing. But a student who edits AI output, rewrites sections by hand, or uses AI only for brainstorming can produce work that scores low on AI detection. Conversely, a human writer with a consistent style, short sentences, or straightforward vocabulary can score high on AI detection flags. Neither tool can definitively prove whether you used AI; they can only estimate the probability.

Both tools also struggle with paraphrasing. If you rewrite a source in your own words without citing it, the tools may not catch it, especially if you change enough words. This is why instructors often ask you to cite sources even when you paraphrase — it is a honesty issue, not a detection issue.

What happens after the report is generated

Once Turnitin or Originality.com produces a report, your instructor can see it in Canvas. The report appears in the assignment submission area, visible only to your instructor and (usually) to you. Your instructor may share the report with you, ask you to explain sections that flagged high similarity, or use it as one piece of evidence in an academic integrity review.

A high similarity score does not automatically mean you plagiarized. Similarity can come from properly cited sources, common phrases, or quoted material. A high AI detection score does not automatically mean you violated your school's policy on AI use — some schools allow AI for brainstorming or editing, while others ban it entirely. Your school's academic integrity policy and your instructor's syllabus determine what is allowed.

If your instructor suspects a violation, they may ask you to meet with them, refer you to your school's academic integrity office, or involve a dean. You have the right to explain your work and challenge the report if you believe it is inaccurate.

How to understand your own report if you can see it

If your instructor shares your Turnitin or Originality.com report with you, here is what to look for. The similarity percentage shows what portion of your work matches existing sources in the database. A score of 5 to 15 percent is typical for most papers, because it usually includes properly cited quotes and common phrases. A score above 25 percent warrants a closer look — either you have cited many sources, or some sections need citation.

The report highlights matching text in different colors. Blue usually means the text matches a website or published source. Green or other colors may indicate matches to student papers or other databases. Click on the highlighted sections to see what source triggered the match. If the match is a properly cited quote or paraphrase, it is not plagiarism.

The AI detection score, if shown, is a percentage or confidence level. A score above 75 percent suggests the tool thinks the work is likely AI-generated. A score below 25 percent suggests it is likely human-written. Scores in the middle are uncertain. Remember that this is an estimate, not a fact.

Why your school chose one tool over the other

Schools choose between Turnitin and Originality.com based on cost, integration with their Canvas system, and their priorities around AI detection. Turnitin is older and more established, so many schools have used it for years. Originality.com is newer and markets itself as better at AI detection, though research does not show a large difference in accuracy.

Some schools use both tools for different purposes — Turnitin for general plagiarism checking and Originality.com for courses where AI use is a major concern. Others use neither and rely on instructor judgment and manual spot-checking. Your school's choice reflects its academic integrity philosophy and budget, not a judgment about which tool is objectively best.

Frequently Asked Questions

Can I see my Turnitin or Originality.com report before my instructor does?

That depends on how your instructor set up the assignment. Some instructors allow you to see the report when ready after submission so you can check for unintended plagiarism before the final grade. Others hide the report until after they have graded your work. Check your assignment instructions or ask your instructor.

What if the AI detection score is high but I did not use AI?

Ask your instructor to review the report with you. Explain what you actually did — whether you wrote quickly, used straightforward language, or have a consistent writing style. Your instructor knows your work and can judge whether the flag makes sense. If you believe the report is wrong, you have the right to challenge it.

Does a high similarity score mean I failed the assignment?

No. Similarity is not the same as plagiarism. If your sources are properly cited, a high similarity score is normal and acceptable. Your instructor looks at the report in context — what you cited, what you paraphrased, and whether you followed the assignment instructions. A high score alone does not determine your grade.

Can I use AI to write my essay if the similarity checker will catch it?

That depends on your school's policy. Some schools allow AI for brainstorming, outlining, or editing. Others ban it entirely. Check your syllabus and your school's academic integrity policy. If you use AI, be honest about it — many instructors will accept AI-assisted work if you disclose it, but will treat undisclosed AI use as a violation.

What if I submit the same essay to two classes?

Both Turnitin and Originality.com will flag it as a match to your own previous work. Whether this violates academic integrity depends on your school's policy and whether you have permission from both instructors. Some schools allow resubmission with permission; others do not. Ask both instructors before you submit.