In today’s world, AI-generated content has become increasingly prevalent in various industries, and distinguishing between human-generated and AI-generated content is becoming more and more important. This is where AI content detection tools come in. These tools are designed to help identify AI-generated content and can be used in various contexts, such as plagiarism detection, content creation, and research.

In this article, we will discuss the top free AI content detection tools available to help you distinguish between human and AI-generated content.

Free AI Content Detection Tools

1. AI Text Classifier

The AI Text Classifier is an AI content detection tool developed by Open AI, the same company behind ChatGPT. This tool is designed to evaluate the content and determine if it was generated by AI or humans. However, it has some limitations. It can only evaluate content with no more than 1,000 characters and may mislabel both human-written and AI-generated text at times. Additionally, it is not very effective with text written in languages other than English. Nevertheless, the tool is a great option for those looking for a free and reliable AI content detector.

2. GPTZero

GPTZero is considered one of the best AI content detectors in the world, and it has amassed over 1 million users since its launch. One of the benefits of GPTZero is its ability to evaluate a large amount of text (up to 5,000 characters). However, the tool is limited to checking 1 million words every month. There is a paid version of the tool, which offers additional features.

3. Writer

The Writer is an AI content detector that can check up to 1,500 characters of text. The tool is free to use, but the limited character support may be a disadvantage. One of the benefits of Writer is its ability to evaluate webpages and copied text. However, users should keep in mind the character limitation when using the tool.

4. is an excellent AI content detector and plagiarism checker tool. It is the only content detection tool on the market that is specifically designed to detect ChatGPT, GPT-2, GPT-3, GPT-4, and Quillbot paraphrase detection. While it is not a free tool, it offers a free trial and a competitive pricing model.

5. Content at Scale

Content at Scale is another excellent AI content detection tool. It is trained on both human-written and AI-generated text, including ChatGPT. The tool uses NLP, semantic analysis, and three different AI models to find AI-generated content. However, Content at Scale has some limitations. It can only check up to 400 words at a time and does not inform users which AI model was used.

6. GPT-2 Output Detector

GPT-2 Output Detector is one of the best AI content detectors available. However, it only recognizes content produced by GPT. The tool has a user-friendly interface and is free to use. While it may not be able to detect plagiarism, it is still a great tool to detect AI-generated content.

7. CrossPlag

CrossPlag is a powerful tool that aims to preserve originality and combat the growing concern of AI-generated content. With its AI Content Detector, CrossPlag leverages machine learning algorithms and natural language processing to identify and flag AI-generated text accurately. By distinguishing between AI and human writing, CrossPlag ensures the authenticity and integrity of content, making it an essential resource for academia, digital publishing, and maintaining high-quality online content. With CrossPlag, users can confidently protect their work, maintain academic integrity, and stay ahead in an era where originality is paramount.


In conclusion, it is essential to remember that while AI content detection tools can be helpful, they are not foolproof. There may be cases where the tool misidentifies content, and there are limits to its capabilities. Therefore, it is essential to use these tools in conjunction with other methods of content verification, such as manual review or multiple detection tools. With that said, these free AI content detection tools mentioned in this article can provide a useful starting point for anyone looking to distinguish between human and AI-generated content.

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