Top 12 Duplicate Content Checker Tools in 2023 [Free & Premium]

Top 12 Duplicate Content Checker Tools in 2023 [Free & Premium]

Suppose you’re creating content for your website, and, likely, others have already shared information on similar topics. In the process of gathering ideas from various sources, there’s a risk of unintentionally repeating similar blocks of text or paragraphs. This repetition is what we refer to as duplicate content, where identical or substantially similar text appears in more than one place. These instances can be within the same website or across different websites.

People go to different websites hoping to find diverse and unique content. In parallel, search engines try to provide users with original and non-repetitive content. This means that posting duplicate content could affect your search engine rankings or get your website penalized. So, to help you maintain the quality and uniqueness of your content, we will discuss some of the Top 12 Duplicate Content Checker Tools to check for duplicate text. These tools will ensure that your writing remains free from plagiarism and copying, aligning to provide original information to users. This information is valuable for content creators, educators, and anyone who wants to ensure the originality and uniqueness of their written work.

List of Top 12 Duplicate Content Checker Tools

Below are 12 top-notch Duplicate Content Checker Tools designed to enhance your content. They will ensure your write-up is free from duplication, optimized for SEO, grammatically accurate, and easy to read. They are:


Duplichecker is listed first in our list of best SEO Tools Plagiarism Checker. It is a free online tool to check if your written content is original or copied from other sources. You are free to check plagiarism in DOCX, or Text file searches, and even check URLs. Additionally, this tool has an easy-to-use interface such that you just have to open and paste the content you have written. The tool then scans the content thoroughly. Once the scanning process is complete, Duplichecker presents a detailed report that includes the percentage of plagiarism detected in your content. Also, it identifies specific sentences or phrases that are repeated and highlights the sources where these matches are found. Duplichecker is a helpful resource in maintaining the integrity and authenticity of your content.

Note: You need to register/sign up for unlimited free searches.


Siteliner is also a free duplicate content checker tool. However, the tool goes beyond just identifying duplicate content. It allows you to engage in the complexities of your website. By scanning your site, Siteliner provides insight into major issues affecting your website’s overall quality and ranking on the search engine. When you use Siteliner, all you need to do is copy your site’s URL and paste it into the box provided. This tool scans through the content on your website, which reflects any example of duplicate content. However, its capabilities move forward. Siteliner also helps highlight broken links, page sizes, page load time, and others. These factors affect your site’s user experience and search engine adaptation (SEO).

Note: Free Siteliner service allows only “one scan, per site, per month”. Upgrade to Siteliner Premium for incredibly inexpensive options.


Copyleaks is a comprehensive and reliable plagiarism detection tool. Apart from duplicate content detection, it also provides other services, such as AI-generated content Detection, Grammar Checker, and more. It provides real-time analysis, allowing users to get immediate responses to the authenticity of their content. Therefore, on completion of the analysis, Copyleaks generates comprehensive reports. It expands the findings, including the source of potential matches, percentage of similarity, and other relevant information.

Surfer SEO

Surfer SEO is like a guide to your content. The tool is designed to assist users in optimizing their content for search engine ranking. SurferSEO provides its customers with an on-page SEO analysis and valuable recommendations to help users create content that aligns with ranking factors. Apart from this, it helps with keyword research, auditing, getting search volumes, etc. This way, this tool helps you promote organic traffic, increases visibility, and improves rank.


Copyscape is another powerful tool that instantly identifies duplicate content on the Internet. When using this tool, simply enter your website’s URL. Copyscape will detect and highlight the copied content. It’s not just about full copies, even if some part of the content is copied, Copyscape detects it. The premium version comes with advanced features like an API for seamless integration into your workflow. Copycentri, another premium feature, scans the web daily for new copies of your content and notifies you when found. For added protection, you can display a free Copyscape banner on your website to deter potential content thieves.

Note: The free version doesn’t offer advanced features such as API, CopyCenrti, etc.


Plagiarisma is a free plagiarism detection tool that helps you find out whether your writing is original or copied from somewhere else. Amazingly, it works in 190 languages, thus proving to be a useful writing tool for many people. If you write blogs or articles and want to make sure they’re not copied, Plagiarisma is a must-have. Designed with a smart algorithm, this tool checks your writing against a big database of sources. And it gives you accurate results. Moreover, it’s easy to use, so you can check your content quickly before you publish it. With Plagiarisma, you can be confident about your write-ups.


SmallSEOTools offers a comprehensive set of text analysis tools, to quickly analyze and optimize your text. Along with the plagiarism checker, it also includes tools like a free grammar checker, article rewriter, paraphrasing tool, spell checker, and more. Specifically, SmallSEOTools’ plagiarism checker is known for its speed, accuracy, and user-friendly interface. Moreover, it is very easy to check your content using this tool. Simply copy your text and paste it in the given space. Alternatively, you can upload files directly from the cloud, select a file from your Google Drive or Dropbox, or upload a DOCX or text file for analysis.

Note: SmallSEOTools offers a word limit of 1000 words per search. To break the word limit you need to choose a suitable plan.


Quillbot is an online paraphrasing and rewriting tool that helps users create unique and creative content by rewriting existing text. It is designed with advanced algorithms and artificial intelligence to rewrite sentences without disrupting the original meaning. Users just have to paste a sentence or paragraph into Quillbot, and the tool offers alternative phrasing options. In this way, Quillbot aims to help writers create high-quality and original content. Furthermore, it provides a quick and convenient way to rewrite and reorganize text.

Note: It allows you to paraphrase only 125 Words at a time. Get a premium subscription to rewrite and rephrase unlimited words.


Grammarly is a widely used online writing tool designed to increase the quality of written content. This tool works effectively as a browser extension, a desktop application, or a web-based platform. It checks and reviews spelling, grammar, punctuation, clarity, and delivery mistakes in English texts, detects plagiarism, and much more. Additionally, Grammarly suggests replacements for identified errors and you can correct them further. It also allows users to customize their style, tone, and context-specific language.

Note: For better help with grammar, correctness, and refined content, you need to subscribe to the premium version of the tool.


Among various Duplicate content checker tools available online, WhiteSmoke is one. It is also a writing assistant tool, which helps users to improve the quality and correctness of written content. WhiteSmoke is an all-in-one tool that offers grammar, punctuation, spelling, and style checks of your written content. This tool helps you write clear content and improves the style and tone of your content. 


Qutext is an extremely effective tool for verifying the originality of content. This tool uses DeepSearch technology to read, analyze your content, and detect plagiarism. Simply, copy your text and paste it in the provided blank space. Then, click the Check Plagiarism button. This tool will evaluate your content across billions of sources. After the scan is complete, the plagiarism score of your content will be displayed on the screen. Additionally, it highlights the copied lines and cites the matching source material.

Suggestive Tips To Avoid Plagiarism

  • Develop your unique writing style and voice. 
  • Be careful when using someone else’s ideas, quotes, or data.
  • If you want to summarize someone else’s content, do so in your own words, adding your ideas.
  • Always use plagiarism detection tools, to check the originality of your content before publishing.
  • Moreover, to enhance your content, maintain its originality, and make it SEO-friendly, go for TechProGenix Premium SEO Services.


Hence, these are the Top 12 Duplicate Content Checker Tools that you need to know about. Apart from these, there are many other effective duplicate text detector tools such as PlagSpotter, iThenticate, etc. Use these tools to get help writing effectively and creating unique content. However, creating own writing style reduces the chances of duplicate content.

Frequently Asked Questions

Q. Is there a free website to check duplicate content?

There are many free websites to detect duplicate content. Such as:
3.Plagiarism Detector,
9.QueText, etc.

Q. What is the difference between Siteliner and Copyscape?

Siteliner and Copyscape serve different purposes. Siteliner primarily focuses on analyzing a specific website for internal duplication and identifying content-related issues within the site. Copyscape, on the other hand, focuses on detecting plagiarism by comparing submitted content against a huge database of online sources.

Q. How can I check copy content?

You can detect duplicate content with the help of various duplicate text checkers available online. Some of them are Duplichecker, SmallSEOtools, Plagiarisma, and many more.

Q. What are the tools to identify duplicate content?

Some of the effective Duplicate content checker tools are:
2.Plagiarism Detector review
5.Plagiarism detector
12.Duplicate content checker
13.Duplicate content cure
14.SEO plagiarism checker and more.


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