Top 10 popular plagiarism checking software in 2025

Nowadays, ensuring the authenticity and uniqueness of content has become an important factor, especially in the fields of education and writing. Plagiarism checking software not only helps users detect copied content but also improves the quality of writing, ensuring that your product truly has a personal stamp. Let's explore with Sadesign the Top 10 popular plagiarism checking software that you cannot ignore to help your writing become perfect. 

1. Turnitin plagiarism checker software

Turnitin is one of the most popular plagiarism checking software in the education and research fields. With its massive database, Turnitin not only helps users detect copied content but also enhances the authenticity of learning materials. When you upload a paper, the software instantly compares the text with millions of documents, from scientific articles to public websites. This helps you quickly identify potential duplicate passages and understand the similarity to other sources.

Turnitin does more than just detect plagiarism; it also provides users with detailed reports on duplicated passages. You will be provided with information about the source of the passage, the rate of duplication, and even similar passages in other documents. This not only helps you detect problems, but also helps you edit and make your content more unique. With these features, Turnitin has become an indispensable tool for students, teachers, and researchers.

Outstanding features of Turnitin

Accurate copy detection : Turnitin has the ability to identify duplicate content with high accuracy, allowing you to detect cheating even when the text has been edited.

Detailed Reports : The software provides detailed reports that help you easily identify duplicated paragraphs and their sources. This is extremely helpful in improving the quality of your writing.

High security : Turnitin is committed to keeping user information confidential and does not share data with third parties.

Disadvantages of Turnitin

Account requirements and usage fees : To be able to fully utilize the features, users need to register for an account and pay a periodic fee.

No grammar and spelling check : While Turnitin is very robust in detecting plagiarism, it does not check grammar and spelling, which can be difficult for those who want a comprehensive assessment of the quality of their writing.

Database Updates : Test results may not be completely accurate if the database is not updated regularly.

2. Plagiarism Checker X software

Plagiarism Checker X is a free application that stands out for its user-friendly design and multi-language support. It uses advanced algorithms and a rich database to check content comprehensively. With Plagiarism Checker X, users can easily analyze the duplication rate, compare text, and quickly identify the source of content.

One of the highlights of Plagiarism Checker X is its ability to provide detailed reports on the similarity of the text. Not only can you see the duplication rate, but you can also identify the sources of similar content. This gives you a clearer view of the originality of the article and a basis for making necessary adjustments. The software also allows you to save reports for future reference, which is useful for those who want to track the improvement of content over time.

Outstanding features of Plagiarism Checker X

Free and Easy to Use : Plagiarism Checker X is completely free and has a user-friendly interface, making it easy for users to operate and check content.

Multi-language support : The software supports many different languages, very convenient for users around the world.

Detailed Reports : Provides detailed reports on duplicate rates and origins of similar content, making it easy for users to track and edit.

Disadvantages of Plagiarism Checker X

Word count limit : Limiting the test word count to only 1000 words can reduce performance when processing large documents, causing inconvenience to users.

Difficulty in testing long passages : Comparing and contrasting individual sentences in long passages can be difficult, reducing the effectiveness of the test.

Paid Features : Some advanced features are only available in the paid version, which may limit the user experience.

3. Small SEO Tools Plagiarism Checker Software

Small SEO Tools is one of the most prominent plagiarism checking solutions available today, especially suitable for those who are looking for a free and easy-to-use tool. With the integration of advanced algorithms and a rich database, this software allows users to check their content quickly and effectively. You can upload many different file types such as .docx, .pdf, .txt and many other formats, which expands the checking capabilities to many types of documents.

One of the strengths of Small SEO Tools is its ability to scan multiple websites for duplicate text. This not only helps protect copyrights but also helps improve the quality of your content, thereby improving your website's SEO ranking. Using this tool, you will have a clearer view of the sources of information that you may have accidentally copied, helping you to revise and enrich your content.

Small SEO Tools goes beyond plagiarism detection and provides a detailed report on how similar the content is to other sources. Thanks to the highlight view, users can easily identify problematic passages and make necessary adjustments. This is a useful tool not only for students but also for writers, bloggers, and content creators.

Outstanding features of Small SEO Tools

Cross-platform support : Small SEO Tools allows you to integrate documents from Dropbox and Google Drive, making content management convenient and enhancing user experience.

URL Integration : Users can enter the URLs of websites to check for plagiarism directly, saving time and effort in searching for similar content.

Download Report : You can easily download the plagiarism report and share it with colleagues or teachers, helping to increase transparency in your work.

Disadvantages of Small SEO Tools

Checking size limit : Although the software is free, it may have a limit on the amount of text you can check at a time, which may affect performance when working with long documents.

Results are not completely accurate : Although the software provides quick results, it is not always completely accurate, so users should be cautious when making decisions based on test results.

Advertisements : The interface of Small SEO Tools may contain some advertisements, which may annoy users during use.

4. Copyscape plagiarism checker software

Copyscape is a well-known and trusted plagiarism checker used by individuals, businesses, and organizations worldwide. This software not only helps you detect duplicate text but also protects the copyright of your content. Copyscape uses advanced algorithms to scan millions of web pages, comparing your content with published documents on the Internet.

With Copyscape, you can get detailed reports on the similarity of the text, making it easy for you to identify the location and origin of copied passages. This not only helps you improve the quality of your content but also helps you create more unique products. In addition, Copyscape also provides APIs and Plugins, allowing integration with other platforms, thereby improving your content management capabilities.

Copyscape not only provides fast results but also high accuracy, saving users time. Although the software requires a fee to access full features, the benefits it brings are completely worth the investment.

Copyscape's Outstanding Features

Accurate Detection : Copyscape is able to accurately detect duplicate text, including edited or rewritten text.

In-depth reporting : The software provides detailed reports with information about the duplication rate and the origin of the text fragments, making it easy for you to handle the problem.

Flexible Integration : With APIs and Plugins, Copyscape can integrate into many different platforms, making content management more efficient.

Disadvantages of Copyscape

Paid Requirement : To use the full features of Copyscape, users need to pay a fee, which can be a barrier for some.

Lack of grammar checking : Copyscape does not check grammar or spelling, so users need to use other tools to do these tasks.

5. Plagiarism Detector software

Plagiarism Detector is a useful tool that helps users check for plagiarism effectively, ensuring the originality of documents. This software uses a powerful algorithm to compare your content with a huge database of articles, books and documents published on the Internet. This helps users accurately detect copied texts from many different sources.

The interface of Plagiarism Detector is designed to be simple and easy to use, helping users quickly perform plagiarism checking steps. The software allows users to process large documents, thereby enhancing the checking efficiency for long texts. With the syntax and sentence pattern comparison function, Plagiarism Detector can detect more sophisticated cases of plagiarism, helping you protect the copyright of your content.

Additionally, Plagiarism Detector provides detailed reports on the similarity of the text, helping users better understand the plagiarism situation. Although the software has a free version, users need to pay an additional fee to take full advantage of the premium features.

Outstanding features of Plagiarism Detector

User-friendly interface : With simple design, users can easily perform plagiarism check without any difficulty.

Bulk Processing : Plagiarism Detector allows comparing text in large quantities, saving users time.

Sophisticated plagiarism detection : The software is capable of detecting sophisticated cases of plagiarism thanks to its syntax and sentence structure comparison function.

Disadvantages of Plagiarism Detector

Annoying Ads : Plagiarism Detector's online interface may contain ads, which can be annoying to users.

Results are template dependent : The quality of test results may be affected if the template documentation is incorrect or incomplete.

Premium features require payment : To take full advantage of advanced features, users need to invest additional costs.

6. DoIT plagiarism detection software

DoIT is one of the outstanding plagiarism checking software, developed by the University of Technology - Vietnam National University, Hanoi. As a product with a strong Vietnamese identity, DoIT not only helps users detect copied texts but also ensures the originality of the content. With advanced algorithms and rich databases, this software is an ideal choice for those who are looking for an effective plagiarism checking tool in the Vietnamese academic community.

DoIT software is specifically designed to understand and analyze Vietnamese text more accurately than many foreign software. This gives users peace of mind that their texts will be checked thoroughly and accurately. Furthermore, DoIT is completely free, allowing users to access plagiarism checking technology without worrying about costs, which is extremely useful for students and content writers.

In addition to detecting plagiarism, DoIT also supports users in correcting spelling errors, helping to improve the quality of the article. The software's friendly and easy-to-use interface is also a big plus, making the checking process faster and more effective than ever. With DoIT, you will not only protect the copyright of your article but also have the opportunity to perfect the content.

Outstanding features of DoIT

Understand and analyze Vietnamese accurately : DoIT is developed by a Vietnamese team, so this software is capable of analyzing Vietnamese semantics and sentence structure more accurately, helping to detect sophisticated cases of plagiarism.

Free and Easy to Use : Users can access DoIT completely free of charge, without paying any fees, making it perfect for students and content writers.

Fast and detailed results : The software provides instant test results, with clear duplicate percentages and detailed reports, making it easy for users to identify and correct copied passages.

Disadvantages of DoIT

Account Registration Required : To fully utilize DoIT's features, users need to register for an account, which can be a slight barrier for some.

Database limitations : Although DoIT is very powerful in checking Vietnamese content, its ability to compare with international sources may be more limited than some other software.

7. Unicheck plagiarism checking software

Unicheck is known as an advanced plagiarism checking software that helps users protect the originality of their content by detecting duplicate passages. With its in-depth analysis algorithm and rich database, Unicheck is capable of comparing text with millions of documents, from websites to educational databases. This helps users get detailed information about the plagiarism status of their articles.

One of the highlights of Unicheck is its ability to support multiple file formats and allow bulk uploading of documents. This not only saves time but also improves work efficiency, especially for those who need to check large amounts of text in a short time. The software also provides detailed reports, helping you understand the source of duplicate content and giving suggestions to improve text quality.

In addition, Unicheck also integrates suspicious content warnings and allows flexible search settings. This makes it easy to identify plagiarism issues and deal with them promptly. With a friendly interface and extensions such as Google Docs and Google Chrome, Unicheck is the perfect choice for those who are serious about copyright protection and content quality improvement.

Outstanding features of Unicheck

Suspicious content warning : Unicheck will notify you of potentially plagiarized passages, helping you quickly detect and handle problems.

Customize search settings : The software allows you to customize search settings according to your own needs, helping to improve testing efficiency.

Google Docs Integration : This integration allows you to check for plagiarism directly in Google Docs, which is very convenient for those who work online.

Disadvantages of Unicheck

Paid Requirement : To fully utilize the features, users need to pay a fee, which can be a barrier for some users.

There may be a limit on the number of documents : Some versions may have a limit on the number of documents you can upload at one time.

8. DupliChecker plagiarism checker software

DupliChecker is an online tool that helps users detect plagiarism and ensure the originality of their content. The software uses modern algorithms and a rich database to compare text, thereby detecting cases of copying quickly and effectively. DupliChecker supports many different file formats, allowing you to check documents in many formats such as .docx, .txt, .pdf and more.

One of the highlights of DupliChecker is its ability to provide results in percentages, making it easy for users to assess the similarity between documents. The software also comes with a paraphrase tool, which allows you to paraphrase content and remove duplicate passages. This not only helps protect copyrights but also improves the quality of the content you create.

DupliChecker’s interface is very user-friendly and easy to use, helping users quickly grasp how the software works. With its fast and accurate checking results, DupliChecker has become a popular tool not only in the academic community but also among bloggers and writers.

Outstanding features of DupliChecker

Percentage Results : DupliChecker gives you clear information about the duplicate percentage, making it easy for you to identify plagiarism in your text.

Paraphrase Tool : This feature allows you to paraphrase content, effectively eliminating duplicate paragraphs.

Friendly interface : Simple and intuitive interface helps users easily manipulate and use the software without difficulty.

Disadvantages of DupliChecker

Word limit : DupliChecker allows checking up to 1000 words at a time, which can be a barrier for large documents.

Results depend on sample quality : If the sample is incorrect or incomplete, the test results may not be completely accurate.

Ads on the interface : Some users may find ads appearing on the software interface annoying.

9. Plagium plagiarism scanner software

Plagium is a free online tool designed to detect plagiarism and ensure the originality of user documents. By comparing documents against a large online database, Plagium helps you quickly identify duplicate content, thereby protecting copyright and improving the quality of your writing. The combination of intelligent algorithms and a friendly interface has made Plagium a popular choice for many users.

One of the highlights of Plagium is its fast scanning speed and relatively high accuracy. When you upload a document, the software will immediately analyze it and provide results in just a few seconds. This not only saves time but also helps you quickly identify plagiarism issues, so you can make the necessary adjustments. Plagium allows you to check not only saved documents but also URLs and files, expanding the scanning capabilities for users.

Outstanding features of Plagium

Percentage Results : Plagium provides clear test results in percentage form, making it easy for users to see how similar their text is to other sources.

Friendly interface : With a simple and intuitive design, users can easily get acquainted and operate on Plagium without encountering any difficulties.

Fast Results : The scanning process is quick, allowing users to get a detailed report on the source of duplicate content in just a few minutes.

Disadvantages of Plagium

Word count limit : The free version of Plagium only allows checking up to 1000 words at a time, which can be difficult for large documents.

Information Source Limitations : Plagium's testing capabilities may be limited for some information sources, which may affect the accuracy of results.

No Vietnamese support : The lack of Vietnamese support makes it difficult for Plagium to serve Vietnamese users well, limiting the software's applicability in this community.

10. Copyleaks plagiarism checker software

Copyleaks is a powerful online plagiarism scanner that helps users ensure the originality and authenticity of their content. With the help of modern analysis algorithms and a rich database, Copyleaks is able to compare text with millions of documents on the Internet, thereby detecting and preventing cases of improper copying of content. This not only protects copyright but also improves the quality of the text you create.

One of the standout features of Copyleaks is its ability to provide comprehensive reports on the similarity and origin of duplicate content. Users can receive specific suggestions for improving their writing, thereby increasing the value of the content. The automated scoring tool also helps users quickly assess the quality of the writing, thereby identifying problems that need to be addressed.

Copyleaks supports multiple languages, making it an ideal choice for global users. Furthermore, the software is capable of integrating with various platforms such as MS Word and Google Docs, which enhances the efficiency of content management. With features that support students and workgroups, Copyleaks is increasingly becoming an indispensable tool for those who are serious about copyright protection and content quality improvement.

Copyleaks Highlights

Comprehensive Reports : Copyleaks provides detailed reports on the similarity and origin of duplicate content, giving users a clearer view of the plagiarism status of the text.

Automatic scoring : This tool allows you to quickly assess the quality of your text and identify the risk of plagiarism, so you can take the necessary measures.

Cross-Platform Integration : This integration feature allows users to use Copyleaks on a variety of platforms, from MS Word to Google Docs, enhancing the user experience.

Disadvantages of Copyleaks

Paid Requirement : To use all the features and get detailed reports, users need to pay a fee, which can be a deterrent for some.

Can take time : Although Copyleaks works quickly, for large documents, the scanning process can take longer than expected.

Internet connection required : The software works online, so users need to have a stable Internet connection to ensure best performance.

Using plagiarism checking software not only helps protect copyright but also contributes to raising the awareness of creativity in writing. These tools equip users with the ability to control their content, thereby creating better quality works. Choose a suitable software for yourself and start checking unlimited texts!