Top Duplicate Content Checker Tools to Enhance Your SEO Strategy
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11 Best Duplicate Content Checker Tools to Improve Your SEO

Content Marketing

Published: Dec 11, 2023

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Updated on: Nov 13, 2025

11 Best Duplicate Content Checker Tools to Improve Your SEO

Summary: This blog post provides a comprehensive overview of the top 10 duplicate content checker tools, including both free and premium options, catering to various needs and budgets. Whether you’re a casual content creator, a student, a professional writer, or a website owner, there’s a tool on this list that can help you ensure the authenticity of your work. Check them out.

What has been updated from the old blog post:

  • 5 New content checker tools added to the existing list.
  • Pricing added in each tool
  • Added a section on how to figure out the right tool for you.

In today’s digital world, where content is king, ensuring the originality of your work is crucial for maintaining credibility and avoiding potential plagiarism issues.

Duplicate content checker tools are essential for writers, content creators, and website owners to identify and eliminate plagiarized (copied) content.

The mentioned tools in this blog post can help detect similar content over the internet, improve your website’s search engine optimization (SEO) rankings, and protect your reputation.

Let’s get started!

What is Duplicate Content?

Duplicate content happens when the same or very similar text appears on multiple web pages, either on your own site or other websites. This can confuse search engines, making it harder for them to decide which page to rank. While not always a penalty, it can lower your SEO performance. To fix this, use unique content, canonical tags, or 301 redirects to tell search engines which page is the main version. Keeping your content original helps improve rankings and user experience.

Top 11 Duplicate Content Checker Tools for Websites in 2025

Techmagnate has been in the content business for over 17 years. Each tool is used and evaluated by us based on its specific features, pricing, and suitability for different scenarios. We have compiled both free and premium tools for you, catering to various needs and budgets.
Here goes the list:

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Surfer SEO

Surfer SEO is a comprehensive content tool that includes a powerful duplicate content checker. From content structure to outline, it gives you a detailed analysis of your piece along with a duplicate content check. It is ideal for affiliate marketers and niche website owners who require in-depth SEO analysis along with content optimization.

Surfer seo content checker tool

Pricing:

  • Starts from $49/month for the Basic plan.
  • Offers a custom plan for enterprise-level needs.

The Basic plan is a good option for small businesses and startups. The Pro plan is a good option for businesses that need more features, such as custom limits and support for multiple users. The Enterprise plan is a good option for large businesses that need the most features and support.

Originality.AI

Originality.AI is a freemium duplicate content checker that offers a generous free plan with up to 20 daily checks. It is suitable for casual content creators and students who need to check a limited number of documents per day.

Originality.AI Plagiarism Checker Tool

Pricing:

  • Free plan with up to 20 daily checks.
  • Premium plans start from $9/month.

Originality.AI strikes a balance between providing a generous free plan for casual users and offering premium features for those who require more advanced capabilities. Its accuracy, ease of use, and detailed reporting make it a worthwhile tool for ensuring the originality of your content piece.

Click here to explore other AI Content Writing Tools that Give Human-Like Output

Grammarly Online Plagiarism Checker

The Grammarly Online Plagiarism Checker is integrated into the Grammarly Premium plan, making it a convenient option for writers who already use Grammarly for grammar and spell-checking.

Plagiarism-Checker-Grammarly

Pricing:

  • Integrated into the Grammarly Premium plan, which starts from $12/month.

Grammarly’s Online Plagiarism Checker is a great tool for writers who want to ensure their work’s originality while maintaining its comprehensive grammar and spell-checking capabilities. Its combination of accuracy, ease of use, and detailed content analysis makes it a worthwhile investment for writers of all levels.

Quetext

Quetext offers a unique “percentage match” feature that provides a more detailed analysis of plagiarism. It is an ideal duplicate content checker tool for writers who want to check a moderate amount of content per day.

Quetext content checker tool

Pricing:

  • Free plan with limited features and 5 daily checks.
  • Paid plans start from $10/month.

Quetext’s combination of accuracy, citation generation, and additional features makes it another worthwhile tool for bloggers who want to ensure the originality of their content. Its unique percentage match feature provides a more comprehensive plagiarism analysis, allowing writers to refine their work and maintain academic integrity.

Online Plagiarism Checker

A plagiarism checker is designed to identify and highlight copied content in texts through deep analysis and detailed reporting using advanced AI algorithms. It can check for content duplicacy as well as AI similarity. This tool offers many features with no limitations.

Online Plagiarism Checker

Pricing:

  • Free of cost, with no subscription required.

The plagiarism detection tool offers a wide range of other writing tools, including grammar checking, paraphrasing, summarizing, and many others. It provides a comprehensive package that is very beneficial for both students and professionals. The tool is entirely free and features a user-friendly interface, making it one of the best options available with numerous features.

Unicheck

Unicheck is widely used in educational institutions due to its advanced features, including deep search and multi-language support. It is suitable for professional writers who need to check large documents in multiple languages.

Plagiarism Detection and Prevention Tool Unicheck

Pricing:

  • Custom pricing for educational institutions.
  • Paid plans for individuals start from $15/month.

Unicheck stands out as a powerful and versatile plagiarism detection tool, particularly for professional writers in educational institutions. Its advanced features, comprehensive capabilities, and ease of use make it an essential safeguard for maintaining academic integrity and ensuring the originality of written work.

Copyscape

Copyscape is a well-established content checker tool known for its accuracy and reliability. It is ideal for checking external content and identifying potential plagiarism issues.

Copyscape plagiarism checker

Pricing:

  • Free plan with limited checks.
  • Paid plans start from $10/month

Copyscape’s combination of an extensive database, sophisticated algorithms, regular updates, proven track record, and diverse usage options makes it a cornerstone in the tools of plagiarism detection. Its reputation for accuracy and reliability has solidified its position as a trusted tool for individuals and organizations seeking to safeguard the originality of their written work.

PlagSpotter

PlagSpotter provides a unique “similarity score” feature that complements traditional plagiarism detection methods. It is suitable for writers who want a moderate amount of daily checks.

PlagSpotter

Pricing:

  • Free plan with limited checks.
  • Paid plans start from $15/month.

PlagSpotter stands out as a powerful and versatile plagiarism detection tool. Its unique similarity score feature complements traditional detection methods, providing a more nuanced assessment of the originality of the content.

DupliChecker

DupliChecker is a user-friendly tool suitable for casual content creators and students who need to check a limited number of documents per day.

duplichecker

Pricing:

  • Free plan with limited checks.
  • Paid plans start from $5/month.

DupliChecker strikes a balance between ease of use and comprehensive plagiarism detection, making it a worthwhile tool for casual content creators and students. Its free plan, user-friendly interface, and detailed reporting make it an accessible and effective solution for ensuring the originality of written work.

Siteliner

Siteliner is specifically designed for website owners who want to check for internal duplicate content. It is ideal for identifying potential SEO issues caused by duplicate content.

siteliner

Pricing:

  • Free plan with limited checks.
  • Paid plans start from $29/month.

Siteliner stands out as a valuable tool for website owners who want to optimize their SEO performance by identifying and addressing internal duplicate content issues. Its focus on internal duplicate content, SEO-oriented reporting, comprehensive analysis, user-friendly interface, and free plan make it an effective solution for improving website content and search engine rankings.

Copyleaks

Copyleaks offers advanced features, including deep search and multi-language support, making it suitable for businesses and professional writers who require comprehensive content plagiarism detection.

Copyleaks

Pricing:

  • Custom pricing for businesses.
  • Paid plans for individuals start from $19/month.

Copyleaks stands out as a powerful and versatile plagiarism detection tool, particularly for professionals who require comprehensive and reliable originality checks. Its advanced features, including deep search, multi-language support, and API integration, make it an indispensable tool for safeguarding the authenticity of written work across various industries and linguistic contexts.

How to Choose the Right Duplicate Content Checker Tool?

We have mentioned the top best tools available in the market. However, the choice of the best duplicate content checker depends on your specific needs, budget, and usage patterns.

You can consider these factors while making your decision:

1. Your needs: What type of content do you need to check? If you only need to check short pieces of text, a free tool may be sufficient. However, if you need to check large documents or multiple languages, you may need a paid tool with more advanced features.

2. Your budget: How much are you willing to spend on a duplicate content checker? There are a variety of tools available at different price points. Compare the prices before making a purchase.

3. Your workflow: How do you plan to use the tool? If you need to check content regularly, you may want to choose a tool that offers a subscription plan. Look for offers and special seasonal discounts to make the best use of your subscription.

We hope this guide helps you in picking the best content checker tool for your business.

Additionally, Techmagnate also provides premium content optimization services. From creating plagiarized free content to ranking it on SERP, we do it all.

If you want quality content that ranks and improves your website visibility, contact us now.

Why Do You Need Duplicate Content Checkers ?

  • Avoid SEO Issues – Search engines may not rank pages with duplicate content, lowering your visibility.
  • Prevent Plagiarism – Ensures your content is unique and not copied from other sources.
  • Improve Website Ranking – Unique content helps boost search rankings and traffic.
  • Enhance Credibility – Original content builds trust with your audience.
  • Save Time – Quickly detects duplicate content so you can fix issues before publishing.

Frequently Asked Questions (FAQs)

  • Are duplicate content checker tools expensive?

    Some are free, while premium tools offer advanced features at a cost.

  • What are some good duplicate content checker tools that are free?

  • How Does Google Measure Thin Content?

  • How can duplicate content create difficulty in ranking?

  • How to deal with duplicate content issues?

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Sarvesh Bagla

Founder and CEO - Techmagnate

Sarvesh Bagla is an enterprise SEO expert and industry leader who has driven transformational digital growth for India’s top brands across the BFSI, Healthcare, Automotive, and ECommerce industries. As the Founder and CEO of Techmagnate, he leads large-scale organic search strategies and performance marketing campaigns for businesses looking to succeed in today’s AI-driven search landscape.

A strong advocate for thought leadership, Sarvesh is deeply involved in SEO evangelism and regularly contributes to industry discussions through LinkedIn, webinars, and CMO roundtables. His focus today is on helping brands prepare for an AI-first SEO future (AEO, GEO) and strategies for Large Language Models (LLMs) at the core.

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