The Best Free AI Writing Detectors to Evaluate the Quality of Your Content


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  • Aug 23, 2023
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The Best Free AI Writing Detectors to Evaluate the Quality of Your Content

What is the best AI detector? Modern tools like ChatGPT and others similar to it are astonishing in their ability to produce text with grammatical accuracy and up-to-date vocabulary usage. They are capable of composing news, poems, essays, technical manuals, and even small programs. However, with recent advancements in the field of generative AI, one significant issue has emerged: how can we evaluate the quality of the written texts, or to be more precise, how can we detect AI content, when it is necessary? Despite the ability to create articles that are grammatically correct and meaningful rather than gibberish, the degree of “robotness” in the output is a factor that must be closely examined.

It’s one thing to generate text that is informative, but the task to check AI content quality, and ensuring it is written in a style consistent with human language, presents another challenge. More specifically, the output from early versions of generative AI tools may come across as repetitive or overly mechanical. These instruments often use the same words or phrases repeatedly, resulting in language that may seem “robotic” rather than resembling natural human speech. Furthermore, even when the text is completely human-written, it can sometimes be mistaken for machine-generated content, which introduces another reason to consider the possible solutions to the problem.

The most popular method to evaluate the quality of articles involves specific AI writing detectors that have emerged in response to advancements in generative AI. These instruments check how structured and mechanical the text appears. They produce a percentage result indicating the likelihood that a machine created the paragraphs. Although the exact algorithms used by these tools are not explicitly known, it’s likely that they primarily focus on the text’s style.

For instance, attention might be paid by these free AI content detectors to whether an exceptionally informative style is followed by the article, resembling an encyclopedia entry, which lacks figures of speech and adjectives. It’s evident that if this is indeed the case, the results may be deemed reliable when evaluating general-topic content, where the use of rhetorical devices is appropriate. However, when assessing materials such as tutorials and technical documents, where a purely informative style is mandatory and any superfluous figures of speech or adjectives are unacceptable, the reliability of these AI writing detectors may come into question.

We intentionally highlight this peculiarity to help you better understand the fundamental workings of the AI copy detectors. With this understanding, you will be able to scrutinize the text more judiciously. Overall, widespread concerns about content quality stem from two primary factors:

  1. Firstly, the final impression of the text. It’s clear that if an article lacks synonyms and is written in a “robotic” style, it may not always appeal to readers.
  2. The second factor is that some search engines might “disfavor” overly mechanical texts.

Both of these points are crucial, but from another point of view, AI-generated texts often lack the grammatical and stylistic errors that are common in human speech and writing. With correct application, AI tools can produce content surpassing human-made quality. Despite rumors concerning some search engines’ current hesitance to embrace AI-generated documents — fueled by fears about ChatGPT potentially becoming a “Google killer” — a more balanced viewpoint is likely to gain traction in the future, leading to the elimination of AI writing detectors. And it should not be surprising: If AI text generators can produce superior content, why exclude it simply because it is not written entirely by humans?

With this thought-provoking question, we segue into the main topic of our roundup. If you’re interested in evaluating the quality of your texts and have concerns about their level of “robotness” (as content can often seem machine-generated even if it was entirely written by a human), we will discuss the best AI detectors currently available on the market for free. Through their judicious use, you can make your texts more engaging and “human”-sounding. However, it’s important to interpret the results with a balanced perspective — sometimes these instruments may be unnecessary and could even be counterproductive.

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1. AI Text Classifier from OpenAI

AI Text Classifier from OpenAI.

The simplest and most straightforward free AI content detector is the Classifier from the renowned creator of ChatGPT. Upon using this online service, you will receive a “status” for the submitted document. The possible outcomes include: “very unlikely”, “unlikely”, “unclear”, “possibly”, or “likely” to be AI-generated. Interpretation is self-explanatory. That being said, false positives can occur, a fact acknowledged on the classifier’s page. However, in most cases, the results are accurate, as verified by multiple experiments.

The indisputable advantage of this AI writing detector is that it is entirely free of charge. Additionally, it is conveniently located on the same website as ChatGPT, eliminating the need to search elsewhere. With the OpenAI comprehensive platform, you can generate text using AI and evaluate its “robotic” qualities. By default, the results will likely indicate the piece is AI-generated. However, if you used ChatGPT to quickly verify some facts or gather information without resorting to a separate online search, and then rewrote this information in your own style and with your own words, the text’s “humanity” rating should be excellent.

2. Best AI Detection tool from GPTZero

AI Detection tool from GPTZero.

Another popular AI writing detector for assessing content quality is GPTZero. This service has a default limit, allowing users to check text pieces of up to 5000 characters for free. If you need to review more extensive articles, a premium version is available. In contrast to the previous tool, which required users to paste the text into an online form, GPTZero allows you to upload Word documents and analyze them directly.

The advantage of the platform lies in its simplicity and convenience. Also, the results are accurate in most cases. However, a notable drawback of this AI content detector is that its free version limits analysis to 5000 characters. So, if your document is larger, you’ll either need to check it in sections or subscribe to the premium plan. By comparison, the default classifier from OpenAI appears to have no clear limitations on text size. Our experience has shown that it can handle texts up to 3000 words long.

3. AI Writing Detector from

AI Writing Detector from

This tool imposes a stricter constraint than the previous one. Compared to the 5000-character capacity of GPTZero, this AI content detector only permits up to 2000 symbols per query by default. After registration, you’ll be able to process requests of up to 8000 characters. However, this enhanced limit is only accessible during the 30-day Pro trial account phase. Upon completion of this period, you’ll need to either subscribe for continued service or register a new account with a different email to secure another free trial.

An interesting feature of this service is its automatic analysis. Unlike the previous platforms, where you must press a “Submit” button to receive results, detects entered text automatically and initiates the checkup without any further user interaction. Additionally, unlike the previous services which present results in the form of phrases or sentences (such as “Very unlikely” or “Your text is likely to be written entirely by a human”), Sapling’s AI writing detector provides a percentage indicative of “robotic”-styled text.

4. Writer AI content detector

Writer AI content detector.

The Writer AI checker is likely the most visually appealing tool in terms of user interface. It imposes a stricter character constraint than previously mentioned analogs: 1500 symbols. This AI content detector is available solely in a complimentary format, making it impossible to expand the text-checking capacity. It is often suggested to use this application along with similar tools, checking text paragraph by paragraph. By breaking down the article into smaller parts for examination, one can ensure each section convincingly resembles human-written prose.

Contrary to the services discussed earlier, this instrument also possesses the capability to scrutinize online text using its URL. Regarding accuracy, this AI content detection tool delivers highly precise results. Apart from being offered in the format of a webpage, the instrument is also available for usage through an API.

Furthermore, the FAQ page elucidates the process by which it determines if the text seems to be crafted by a human or generated by a machine, providing users with deeper insights into its functionality. Specifically, the AI content detector inspects if the supplied text, in response to a question or input, appears to adhere to a similar word pattern that a large language model is likely to generate.

5. AI Text Detector from

AI Text Detector from

Here’s another example of an AI content detector. It has a familiar interface and delivers results in a verbal format. When you hover over specific paragraphs, it also provides a percentage chance that the paragraph was generated by a human. Unlike previous instruments, this one also offers a Google Chrome extension. Once you install the plugin, you can select text on a webpage in your browser and click on the icon of the Copyleaks detection tool in your extensions toolbar.

Upon registration, users unlock additional options including Enhanced Features that extend the tool’s capabilities. These features encompass detection in 12 different languages, faster results for rapid analysis, increased text capacity for larger volumes of content, prioritized detection to expedite the process, and the bonus of 5x additional daily scans. The utility and convenience offered by these extended features make this AI writing detector popular among teachers and students who often need to check the quality of the content in their academic pursuits.

Key Takeaways: What is the best AI detector?

In today’s technologically advanced world, the importance of high-quality textual materials cannot be overstated. It is crucial to be able to identify whether an article has been generated by AI or written by a human, as this greatly affects reader engagement.

There are various AI writing detectors available, each with its own distinct characteristics. In this write-up, we have highlighted several top-notch free solutions that stand out in the market. Additionally, there are other alternatives, but they are merely clones of the tools already listed. Therefore, mentioning these copycats with similar functionalities would add no additional value to the overview.

Now, let’s summarize the main takeaways from the article:

  1. The AI Text Classifier from OpenAI is an accessible, free instrument for detecting the “robotic” nature of texts. It might occasionally yield false positives, but the absence of declared limits on the content size is an indisputable advantage.
  2. GPTZero allows direct Word document uploads for analysis, in addition to the familiar web interface. However, its free version has a 5,000-character limit.
  3. Sapling’s AI writing detector provides automatic analysis and returns a percentage result. However, the free trial period imposes a more stringent limit of up to 2,000 symbols per query.
  4.’s detector allows URL scrutiny and offers a comprehensive FAQ for better understanding. The tool also has an even more stringent character limit.
  5. offers a Chrome extension and additional features upon registration, appealing to those in academic environments.

While these AI writing detectors provide valuable insight, they are merely guides in your quest for quality content. None of them are infallible, and they can occasionally misjudge human-written content as robotic or vice versa. It is essential to maintain a balanced perspective when using these tools and not rely solely on them to determine content quality.

Moreover, bear in mind that AI-generated content, despite potential criticisms, can often surpass human-made articles in grammatical accuracy and factual correctness. The goal isn’t to eliminate AI-generated texts but rather to guide them to mimic the depth, variability, and beauty of human language more effectively.

Ultimately, as AI technology continues to evolve, so too will the instruments used to evaluate it. Whether you’re a developer, content creator, or an everyday user, staying informed about these advancements will help you navigate this rapidly growing landscape. Generative AI is a powerful invention that, with careful use and sensible application, can add significant value to our digital lives.

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