Duplichecker AI Detector Review

Duplichecker is a free AI detector for GPT3/GPT4 content. It is user-friendly. Ideal for students, writers, and bloggers.

By: Steven Pinker, Published on: 2024-01-05, Last Updated: 13-01-2024

Reviewed by: Joanna Penn

Table of Contents

Duplichecker makes life easy by scanning the internet to check whether your website contains duplicate content. It’s a website that ensures originality for writers, students, and others. It also offers a paraphrasing tool, grammar checker, word counter, and many other tools.

DupliChecker's AI detector is a simple solution to avoid AI plagiarism within the content. It can point out AI-written content created by the GPT 3 and GPT 4 models. 

Today, I’ll review DupliChecker's AI checker to determine how accurately it works. Before I start reviewing, let’s find out the review process.

Process of Reviewing 

I thoroughly tested DupliChecker's AI finder to see how well it could tell whether the content was written by a human or generated by AI:

Step 1: Initial Evaluation

I began the review process by comparing human-written and AI-generated content to see if this AI checker could tell the difference.

Step 2: Precision and Reliability Test

In this step, I compared the accuracy of this tool to that of a human-written blog and an AI-generated piece. 

Step 3: Experimenting with Strategies

Finally, I tried various tricks to see if this AI detector could show AI-generated content as human-written. 

Checking How Well DupliChecker's AI Detector Works

This tool can easily check for AI similarity within the content. You have just to open the website, go to its AI content detector, copy and paste your text in the text box, and click on “Detect AI content.”

Now, let’s check the accuracy of this AI finder. I asked ChatGPT to create a paragraph on the topic “Uses of Bluetooth.”

ChatGPT instantly provided me with a paragraph of 122 words on this topic. Now, let’s see if this tool can detect AI similarity.

I opened DupliChecker’s AI content detector. In its text box, I pasted my generated content. Now, let’s see if it detects AI similarity within the content. 

This AI checker shows that my AI-written content has just 41.2% AI plagiarism. 

Now, I’ll again generate a paragraph from ChatGPT, to see if it works. So, I prompted it to create a paragraph on the topic “Green tea.”

ChatGPT provided me with a paragraph of 98 words on that topic. Now, let’s check its AI percentage in this content. 

On pasting that paragraph in Duplichecker’s AI finder and pressing the detection button, it showed me that its AI similarity is 0%. 

To my satisfaction, this time I created a paragraph from Bard on the topic "Happiness."

Bard instantly writes me a paragraph of 197 words. Now, it’s time to see what it will do with this AI-written text. 

At this moment, Duplichecker’s AI detector showed me that this content has a 99.9% AI percentage. This time, the result was accurate.

Ok now, as I have checked the AI of the text. So, it’s time for me to find out whether this tool detects AI in human-written content. 

Now, I wrote a paragraph and inserted it in the text box of this tool. Will it point out AI in that text?

Let’s find out about this query.

Here is the result, and this time Duplichecker’s AI detector showed me that this content has 0.1% AI plagiarism in it.

So, it means that this tool does not work very well, as sometimes it doesn’t give authentic results.

Key Features 

  • Identify AI-written text created from GPT3 and GPT4.
  • It supports multiple languages.
  • It can analyze up to 2000 words in a single go.

What Does Duplichecker’s AI Detector Cost?

Its AI detection tool is free to use.

Pros and Cons of Duplichecker’s AI Detector

Let us look at the pros and cons. 


  • It has 100% accuracy (but when I checked, it doesn’t work as well as they claim). 
  • It’s free.
  • Have a user-friendly interface.


  • Don’t give any detail on the report.
  • It lacks a feature that highlights the AI-detected text.
  • Most of the time, it doesn’t show authentic results.

Best Suited For

Duplichecker’s AI checker is good for students, teachers, writers, bloggers, marketers, and everyone who wants to detect AI in their content.


Here are some of the top alternatives to Duplichecker’s AI detector that you can use:

  • GPTZero
  • Scribbr 
  • Undetectable.ai
  • ZeroGPT 
  • ContentDetector.AI 
  • Detecting-ai.com

Final Thoughts

Duplichecker's AI Detector is a handy tool for spotting AI-written content, particularly from GPT3 and GPT4 models. It's user-friendly and free, but my review found inconsistent accuracy, casting doubt on its reliability. However, it could still be useful for students, teachers, writers, bloggers, and marketers looking for a straightforward AI detection option.