How to Remove Plagiarism From Your Essay — Tested Methods That Actually Work
Got a high similarity score and a deadline tomorrow? Here's the honest breakdown of what actually reduces plagiarism — not the tricks, the real methods.
My roommate knocked on my door at 11pm on a Tuesday. His 3-year PhD chapter — 18,000 words — had just come back from his supervisor with a note: "Turnitin shows 72% similarity. Fix before committee review." Submission was in 36 hours.
He hadn't been deliberately cheating. He'd compiled a literature review by copying excerpts from papers as notes, intending to rewrite them later, and then forgot which parts were notes and which were his own writing. A mistake — but one with real consequences.
We spent the next 12 hours fixing it. Here's exactly what we did and what I learned from it.
Why Your Similarity Score Is High (It's Not Always What You Think)
Before fixing anything, understand what's actually causing the score. Turnitin highlights matches — but not all matches are plagiarism.
Copied text from sources (actual plagiarism)
What to do: Rewrite genuinely or convert to proper quotation with citation.
Your own previous submissions (self-plagiarism)
What to do: Some institutions allow reusing your own work — check policy. If not allowed, rewrite.
Common academic phrases ('previous studies suggest', 'it can be concluded')
What to do: Generally excluded from similarity calculation. Don't change these.
Properly cited quotations
What to do: Most universities exclude matches in quotations from the score. Verify your citations are formatted correctly.
Methodology descriptions (standard lab procedures, equations)
What to do: Standard technical language is expected — most institutions exclude it.
What Doesn't Work (Save Your Time)
Changing fonts to white and adding filler text between words
Turnitin extracts plain text before analysis. Formatting tricks do nothing.
Replacing every 5th word with a synonym
Sentence-level structure stays the same. Similarity score barely changes.
Translating to another language and back
Produces unnatural English. Turnitin still detects the structural patterns.
Simply reordering paragraphs
Turnitin checks individual sentence matches, not paragraph order.
Adding more text to dilute the percentage
More words don't reduce the matched sections. The percentage is based on matched word count to total word count.
What Actually Works — Method by Method
Contextual Paraphrasing (Not Word Swapping)
Close the original source. Write the idea from memory. Then go back and compare — if your version and the original have the same sentence structure, restructure yours. This takes longer but produces genuinely original text that detectors can't flag.
When you can't write from memory or you're working against a deadline, a good paraphrasing tool helps. I use TaskGuru's free AI Paraphraser — it restructures whole sentences rather than substituting synonyms, which is what actually drops similarity scores.
Free AI Paraphraser
Contextual rewriting · No word limit · No signup
Convert Copied Text to Proper Quotations
If you genuinely need the exact wording from a source, make it a direct quote. Put it in quotation marks, cite it properly (APA/MLA/Chicago as required), and most plagiarism checkers will exclude properly formatted quotations from the similarity score.
Don't abuse this — a paper that's 40% direct quotations is considered poor academic writing even if it's technically not plagiarism. Use quotes sparingly for statements where exact wording is important.
Add Your Own Analysis Between Every Sourced Idea
This was the main issue in my roommate's chapter. He had copied or closely paraphrased sources back-to-back with almost no original analysis in between. The fix: after every idea from a source, write 2-3 sentences of your own analysis. What does this mean? How does it relate to your argument? What's your perspective on it?
This both dilutes the similarity percentage (more original words) and — more importantly — turns a literature dump into actual academic writing.
Change Sentence Structure Completely — Not Just Vocabulary
If the original is: "Subject + verb + object in a specific order" — flip it. Start with a clause from the middle of the sentence. Change active to passive or vice versa. Split one long sentence into two. Combine two short sentences into one.
Original: "Researchers found that students who slept 7-8 hours performed significantly better on memory tests than those who slept fewer than 6 hours."
Rewritten: "Memory performance in students appears closely linked to sleep duration. In studies comparing rest patterns, those getting fewer than 6 hours consistently underperformed compared to peers who slept 7-8 hours."
The Workflow We Used for 36-Hour Deadline (And You Can Use Tonight)
Print the Turnitin report. Highlight only the sections with HIGH similarity (over 25 words matched).
For each highlighted section: Is it a direct copy? Paraphrase from scratch using the 'close-the-source' method.
For sections you need to keep: convert to formal quotation with citation.
Run highlighted sections through the AI Paraphraser first, then manually rewrite 20% of each output yourself.
Add 2-3 sentences of original analysis after each rewritten section.
Submit again to check similarity. Repeat on remaining high sections until under threshold.
My roommate got from 72% to 11% in 12 hours using this. He passed the review.
Common Questions
What is a good plagiarism percentage for Turnitin?▼
Most universities consider under 15% similarity acceptable. Under 10% is generally safe. 15-25% typically requires justification. Above 25% is usually flagged for review. These thresholds vary by institution — always check your department's specific policy. Note that some similarity is expected and acceptable (common phrases, citations, methodology descriptions).
Does paraphrasing count as plagiarism?▼
Genuine paraphrasing — where you've understood the idea and expressed it in entirely your own words — is not plagiarism if you cite the source. Word-substitution paraphrasing (swapping synonyms without restructuring) is still considered plagiarism at most institutions because the underlying sentence structure and idea order remain copied.
Can I use a free tool to remove plagiarism from my essay?▼
TaskGuru's free AI Paraphraser (taskguru.online/tools/text-paraphraser) rewrites text contextually, which significantly reduces similarity scores by changing sentence structures, not just vocabulary. For best results: paraphrase, manually edit to add your own perspective, then re-run through a plagiarism checker.
How do I check plagiarism for free?▼
TaskGuru's free AI Content Detector checks how AI-like your text reads. For similarity checking specifically, Grammarly's free tier checks against web sources. Your institution likely has Turnitin access — you can usually submit drafts to see your similarity report before final submission.
How long does it take to reduce plagiarism in a 2000-word essay?▼
With a combination of the AI Paraphraser and manual editing: 30-45 minutes for a 2000-word essay. Paste 500-600 words at a time, paraphrase, read the output, make manual edits to add your voice and specific examples, then move to the next section. The manual editing step is what takes the longest but also produces the best results.