Free plagiarism check: Copy-paste text to scan essays, assignments & docs, detect duplicates/copyright content, AI flag, check grammar, and get a free report.
Effort matters, but blind effort is dangerous. One of the biggest traps in content creation happens at the very beginning unknowingly collecting copyrighted or plagiarized material. With an AI plagiarism checker, you can quickly screen your sources before drafting, blocking problematic content from entering your workflow and avoiding expensive rework.
As your content evolves, so do the risks. Missing citations, unlicensed passages, or rushed final checks can all leave hidden issues behind. By scanning continuously while editing and running a full originality review before publishing, an AI plagiarism checker helps eliminate small mistakes early, ensuring every change adds quality without introducing new problems.
Once your work is live, new threats appear: plagiarism, reworded versions, unauthorized reposts, and difficulty proving ownership. An AI plagiarism checker scans the entire web, flags suspicious overlaps, and generates verifiable reports to defend your rights and keep your hard work protected.
Beyond protection, AI plagiarism detection helps you learn from your work. By analyzing overlap and patterns in your content, you can identify which ideas or expressions are commonly repeated, adjust your writing and logic, and refine your future projects. Over time, this process builds a personal standard for original creation, enabling every new piece to be more unique, high-quality, and compliant.
Decopy AI detects copied or AI-generated text with high accuracy, clearly shows content sources, and ensures every work can stand up to originality checks with confidence.
Simply paste your text to scan instantly, or upload formats like Word or PDF. The system identifies whether the content comes from AI writing, online plagiarism, unauthorized reposts, or your own input, ensuring ownership is always transparent.
With advanced NLP, our plagiarism checkers word-for-word matching pinpoints exact duplicates, and highlights results with colors, making it easy to check for plagiarism in seconds.
See originality and plagiarism percentages at a glance. No need to review line by line the plagiarism report gives you a clear overview of text similarity in seconds.
This online plagiarism checker supports 8 major languages. Ideal for students, researchers, and international professionals.
Every match links back to the source. Click to view, edit, or cite correctly without manual searches, making it simple to remove or rewrite duplicate content.
Besides detection, it fixes grammar, spelling, and formatting errors. This ensures proper citations, polished style, and plagiarism-free writing that looks professional and credible.
Decopy saves time and effort by providing fast, accurate, and consistent plagiarism detection across vast resources, far outperforming manual checking.
| Comparison Dimension | Decopy Plagiarism Checker | Manual Checking |
|---|---|---|
| Speed | Results in 3 seconds; just 5 minutes | Checking 1 essay takes 2 hours; a batch takes a full day |
| Accuracy | Uses semantic analysis + web-wide comparison, with less than 1% miss rate | Relies on the human eye, often misses “paraphrased plagiarism,” accuracy below 60% |
| Coverage | Scans billions of web pages, academic journals, and multilingual resources | Limited to only a few known websites |
| Cost | Free | Spend more time and energy |
| Ease of Use | Paste or upload → click button → get a plagiarism report in 3 steps | Copy each sentence into search engines and manually track sources |
| Consistency | Every scan gives the same result, unaffected by who checks | Different people, different results |
Decopy helping you avoid the legal, academic, personal, and professional risks of copied content.
Worried about improper citations of academic plagiarism? Universities like Duke have strict review departments. Decopy helps you stay safe with support for multiple formats even math or physics papers run an essay plagiarism checker at zero cost and pass reviews with confidence.
No time to scan assignments line by line? Overlooking plagiarism risks unfair grading and encourages dishonesty. With Decopy, you can use our online plagiarism checker to review 20 assignments in 10 minutes, with color-coded results for plagiarism, citation, and originality.
Concerned about rewriting, stolen articles, or false accusations? Decopy’s duplicate content checker identifies paraphrased copies, provides source links, and supports multiple languages, making it the ideal plagiarism detector for global creators.
In the workplace, copied content can spark copyright disputes, financial loss, or even lawsuits. With Decopy’s content similarity detection, you can ensure originality in reports, proposals, and contracts. while ensuring privacy at every step.
Instantly check for plagiarism with a quick, free scan anytime.
Covers billions of web pages, academic papers, and articles to deliver a complete plagiarism check.
Detect plagiarism across multiple languages, from English to Spanish and beyond.
Built-in grammar checker ensures your writing is both plagiarism-free and polished.
Use our AI detector to accurately identify whether text is human-written or AI-generated.
Your uploads are safe, never stored, and always confidential.
Many cases of plagiarism happen unintentionally, often because people don’t recognize its various forms. Decopy not only detects plagiarism accurately but also helps you understand different risks:
To stay clear of plagiarism disputes, proactive prevention is key:
Cite sources meticulously
When taking notes, record full details (author, year, page number, etc.). When using external materials such as academic journal articles. Only quote the essential parts that support your ideas, and ensure every citation accurately corresponds to the source. Avoid over-relying on open platforms like Wikipedia.
Focus on original ideas
Academic and creative fields value intellectual originality. Base your writing on your own analysis and reasoning. Use external sources only as supporting evidence, avoiding long excerpts from others’ work. Even when summarizing ideas, express them through your own logic and phrasing.
Use tools to enhance originality
Rewriting and grammar-check tools can optimize up to 75% of your content, making it fluent while reducing plagiarism risk. Additionally, scan your work with an AI plagiarism checker or plagiarism detection software beforehand to ensure your paper or copy is truly original.
Plagiarism, in any form, is essentially the theft of someone else’s work, and its consequences can be far-reaching:
Simply put, plagiarism is using someone else’s words, ideas, or data without proper attribution, including direct copying, paraphrasing, or self-plagiarism (e.g., reusing your old essay in a new assignment). According to the Oxford Dictionary, this is considered fraudulent behavior, which must be strictly avoided in both academic and commercial contexts.
Absolutely! You can check up to 20,000 words at a time, supporting .docx, .pdf, and other formats. Students can review and check essays without any extra cost, making it a reliable plagiarism checker free for academic work.
Decopy supports 8 languages, including Chinese, English, Spanish, Russian, Portuguese, Japanese, French, and German. Whether it’s a thesis plagiarism checker for a minor language or a blog post plagiarism checker in multiple languages, Decopy ensures accurate detection for users worldwide.
Absolutely secure! Documents are only used for real-time plagiarism detection and deleted immediately after checking. No backups are kept, and files are not used for AI training or other purposes. You can safely check private theses or business proposals.
Turnitin requires hundreds of dollars per year, which can be burdensome for students. Grammarly’s free version only supports 500 words and focuses mainly on grammar. In contrast, Decopy offers free plagiarism detection, multi-format and multi-language support making it cost-effective and practical for daily use.
You can paste your text directly into Decopy or upload your assignment check my paper. After clicking the detection button, the system compares your text against online resources, generating a report with plagiarism percentage, highlighted duplicates, and source links to easily identify copied content.
They are different: plagiarism checkers focus on whether work is copied from others, while AI detection focuses on whether content is AI-generated. Using AI alone isn’t plagiarism, but copying AI-generated content without attribution may violate rules. It’s recommended to modify AI content and indicate its source.
Yes! Decopy offers a free paraphrasing tool that can intelligently rephrase repeated content into 100% original text. After rewriting, you can double-check with the AI plagiarism checker to ensure originality and avoid plagiarism.
Download your Google Docs document in your preferred format (.docx, .pdf), then upload it to Decopy. Click the detection button to quickly receive accurate plagiarism reports.
Decopy supports all text content, including essays, website content, social media posts, and more. For students, it provides detailed reports to ensure content originality and maintain academic integrity.
Yes! Using NLP technology, Decopy can identify similarity even if content is reworded with synonyms, reordered, or semantically paraphrased, making it a reliable plagiarism detector.
The system compares your text against online and academic sources, counts repeated words for “exact matches,” “semantic matches,” and “fragmented matches,” then divides by total word count to calculate plagiarism percentage, with originality = 1 − plagiarism rate. Results are shown as a percentage.
Refer to the source links in the report, get author, title, publication, or platform information, and then add proper in-text citations and references according to your required format.