Writing original content is more important than ever. Whether you are writing an assignment, research paper, marketing copy, or blog, it must be unique and plagiarism-free. Otherwise, you might have to face severe consequences.

And when it comes to ensuring uniqueness, nothing matters more than a plagiarism checker. It helps users identify instances of plagiarism and allows them to remove them before submitting the final draft.

Although dozens of plagiarism checkers are available online, most aren’t 100% accurate. They either fail to detect plagiarism or show false positives. But worry not. Today, we will acquaint you with the top plagiarism checkers to help you accurately spot all the duplicate segments in your content.

Without further ado, let’s dive in!

PlagiarismDetector.net

PlagiarismDetector.net is one of the best plagiarism checkers right now. It’s built for students, freelancers and content writers. This free plagiarism checker allows quick uploads and deep scanning, offering a balance between accuracy and usability.

Although the tool isn’t flashy, it works very well. What sets it apart from many of its competitors is its accuracy. It digs deeper than most free tools, especially when it comes to paraphrased text.

You can check entire documents, and it supports many file types. Plus, it gives you a percentage-based report with source links for transparency. Though the free version is limited, the paid option gives you more flexibility and bulk word count access.

Features

Checks content against billions of online pages
Supports .doc, .docx, .pdf, and .txt file formats
Detects paraphrased text
Provides detailed reports with matching percentages

Pros

Catches paraphrased content well
Easy to use
Good accuracy for its price

Best for students and freelance writers who need solid detection on a budget. The free version is available, and the premium starts at $7.95/week.

Turnitin

Turnitin is the heavyweight champion of academic plagiarism checkers. It’s the standard for schools, colleges, and universities around the world. What makes it different? Its exclusive internal database includes student papers, journal articles, subscription-only academic material, and more.

This plagiarism detector is trusted by almost every well-known academic institute across the globe. If Turnitin claims your work is plagiarism-free, everyone will trust it.

However, there is a big issue. It’s not available to individuals. Even if you can afford the plan, you won’t get it. You need access through an institution. Otherwise, you won’t get it at all.

Features

Compares content with billions of online and institutional sources
Tracks text similarity with detailed percentage reports
Integrated feedback tools for educators
Supports peer review and grading

Pros

Top-tier accuracy
Trusted by thousands of universities
Comprehensive reporting

Cons

Not accessible to individuals
Slower scan times

Best for colleges, universities, and educational professionals is tracking student submissions. Not sold to individuals, Institution-only access.

Scribbr

Scribbr is tailored for students and researchers. This plagiarism checker is powered by Turnitin. However, unlike Turnitin, it’s accessible to everyone. Therefore, if you don’t have access to Turnitin, you don’t need to worry. Get Scribbr. It’s as reliable as Turnitin.

Scribbr is ideal for checking academic assignments, final-year projects, dissertations, or academic research papers. Scribbr also includes citation checking and feedback on APA, MLA, and other referencing styles.

Moreover, it’s user-friendly and gives detailed insights into which sections need rewriting. Although it’s a bit expensive compared to many other plagiarism-detection tools, due to its accuracy, it’s worth every penny.

Features

Uses Turnitin’s engine for academic-level checking
Highlights matched text with exact sources
Supports multiple file types
Includes proofreading services (optional)

Pros

Extremely accurate
Great for citation checks
Trusted by academic institutes

Cons

t’s a bit pricey for small assignments
Only helpful for academic content

This is best for Graduate students, PhD candidates, and researchers. The price starts at $19.95 for up to 7,500 words.

DupliChecker

DupliChecker is a handy free tool for basic plagiarism detection. You can paste up to 1,000 words per scan or upload documents. It highlights copied sections and gives a score. Like all the other tools mentioned in this article, it’s also quite reliable as it provides accurate plagiarism reports.

Moreover, it’s paired with grammar checkers, paraphrasers, and many other writing assistants, making it a one-stop solution for writers.

Features

Simple input methods (text and files)
Fast scan results
Basic grammar and rewriting tools included
No account is required for basic use
Works across multiple languages

Pros

No login needed
Decent free features
Works fast

Cons

Ad-heavy interface

Best for freelancers, bloggers, and casual users. Free with limits and the premium plan starts at $5/week

GrammarIn

Most people know GrammarIn for its grammar features, but its plagiarism checker is powerful, too. It scans your text against billions of online sources and highlights any matches.

While it’s not great for academic papers or journal databases, it’s perfect for blogs, web content, and business writing.

Features

Compares text with billions of web pages
Integrated with grammar and style suggestions
Shows the percentage of plagiarism
Provides clickable links to matched content

Pros

Easy to use
Clean design
Offers grammar fixes and plagiarism detection

Cons

Doesn’t detect academic paper matches
No API Access:

Best for writers, business professionals, and researchers. GrammarIn’s plagiarism checker currently offers only a free plan, with no premium version available at this time.

CopyLeaks

CopyLeaks is a powerful tool with a wide range of features. It’s designed for academics, students, and even publishers. It can detect paraphrased content, translated plagiarism, and even AI-generated text.

What sets it apart is the ability to scan code, mathematical expressions, and multilingual content. Its reports are thorough and exportable. While it’s not the fastest tool on this list, it’s definitely one of the most advanced.

Features

Detects paraphrased and translated text
AI content detector available
Supports scanning code and mathematical formulas
Detailed reporting with source links

Pros

Advanced detection
Great for academic and tech writing
Multilingual support

Cons

Slower scan speed
Limited free access

Best for students, freelancers, and tech writers. Free for a limited number of pages, and the paid plans start at $7.99/month

Copyscape

Copyscape is one of the most popular plagiarism checkers for marketers, SEO experts, and professional content creators. It’s built to detect duplicate web content. You enter a URL or upload your content, and it scans the internet for matching text.

Although Copyscape is a bit pricey compared to many of its counterparts, it’s worth it due to its accurate plagiarism reports. Therefore, if you are a professional content creator or website owner and cannot compromise originality, try Copyscape; it will surely gratify your needs.

Features

Checks for duplicate content across the internet
Supports URL input and file uploads
Premium API for batch scanning
Provides external links to matched pages

Pros

Simple and fast
Great for detecting content theft
Web-focused

Cons

No grammar or citation features
Not useful for academic work

Best for bloggers, digital marketers, and website admins. The premium plan starts at 3 cents per 200 words. And 1 cent per extra 100 words.

SmallSEOTools

SmallSEOTools is a lifesaver for content writers, marketers, and casual users. It’s free, quick, and accessible to everyone. Moreover, to use this plagiarism checker, you don’t need to register. Just check your content for plagiarism, analyze reports, and close the tab.

Moreover, it’s very easy to use for everyone. It allows users to copy-paste their text or upload files to scan their text. Besides ease of use, it’s also famous for its accuracy as it rarely fails to spot plagiarism in the content.

The platform also offers various writing tools, including a paraphrasing tool, a grammar checker, and an AI content detector to authenticate and improve their content. So, it’s a one-stop solution for all types of writers.

Features

Copy-paste and file upload options
Fast text scanning
Multi-language support
Bundled grammar checker and paraphraser
No sign-up is required for the free version

Pros

Free for small checks
Extremely fast
Simple UI

Cons

Doesn’t handle paraphrased content well
Basic reporting

Best for bloggers, students, and online writers who are looking for a quick check. Free with unlimited daily use, and the Premium version starts at $5.99/week.

PaperOwl

PapersOwl provides a basic but free plagiarism checker, mainly for students. It’s not as deep as Scribbr or Turnitin, but it gives a general idea of originality. The platform is geared toward academic writing services, and their checker is a free bonus. It highlights matching phrases and gives a score.

Features

Simple and free checker
Works well for academic assignments
Highlights copied sentences
Offers writing assistance (paid)
No signup needed

Pros

Zero cost
Easy to use
Decent for student papers

Cons

Limited depth
No citation checking

Best for students are doing quick checks on homework and essays, and it’s free to use.

QuillBot

QuillBot is best known for rewriting text, but its plagiarism checker (available in premium) holds its own. It checks your content across indexed websites and marks duplicated lines. While it lacks citation feedback, it fits perfectly into your workflow if you’re already using it to paraphrase or improve writing. Moreover, its reports are clean, simple, and easy to understand.

Features

Highlights copied content with sources
Integrated with QuillBot’s rewriting and grammar tools
Supports different file formats
Mobile and desktop-friendly

Pros

Smooth integration with rewriting tools
Great UI
Fast reports

Cons

Doesn’t check citations
No batch document support

Best for content creators and bloggers using QuillBot for paraphrasing. The premium plan starts at $9.95/month.

Wrapping Up

Although plenty of plagiarism checkers are available for users, no tool fits all. Therefore, users must not pick any random tool to check for plagiarism in their content. Instead, they must first analyze their needs and then choose the one that is best suited for that.

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