Recent research indicates that the global AI market could hit $1.5 trillion by 2030, reflecting its growing importance in various fields.
As AI becomes more prevalent, distinguishing between human-written and AI-generated content is crucial. A study by the Pew Research Center found that 35% of American adults think that AI will have adverse effects on the nation in the coming twenty years, whereas only 15% of experts share this concern. This has led many, including educators and writers, to turn to AI detection tools to maintain the integrity of their work.
In this article, We’ll explore effective AI detectors that can help you identify AI-generated content, ensuring your writing remains authentic and reliable. Let’s go through the best options quickly.
Table Of Contents 👉
Best And Free AI Detection Tools
1. ZeroGPT
ZeroGPT is a reliable tool that helps identify text written by AI. It highlights sentences that are detected as AI-generated and shows how much of the text is AI content with a percentage gauge. This makes it easy for users to see how much AI is in their writing.
Besides detecting AI text, ZeroGPT offers several useful features. Users can use tools like a Plagiarism Checker, Paraphraser, Summarizer, Grammar Checker, Translator, and Writing Assistant. This means it helps with writing in many ways, not just detection.
The tool is highly accurate and works in multiple languages, ensuring it can detect AI-generated content no matter the language. It also creates PDF reports for each detection, which can be useful for proving that a text is free of AI influence.
ZeroGPT can handle texts in all languages and allows users to upload multiple files at once for checking.
For businesses, there is an easy-to-use API that lets them integrate ZeroGPT’s features into their own systems. Overall, ZeroGPT is a complete solution for identifying AI-written text while providing extra help for writing tasks.
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2. QuillBot AI Detector (One Of The Best AI Detectors)
QuillBot’s AI Detector is a free, user-friendly tool designed to help you determine whether a piece of text was written by a human, generated by AI, or refined using AI tools.
However, it’s important to note that no AI detector is 100% reliable, so it should not be the only source for making important decisions regarding a person’s career or academic standing.
The AI Detector is designed to distinguish between text created by generative AI tools and text refined with assistive tools like paraphrasers and grammar checkers. This helps reduce false positives and ensures fair treatment for non-native English speakers using writing aids.
QuillBot’s tool is suitable for various projects, including work documents, blog posts, research papers, and class assignments.
Using QuillBot’s AI Detector is straightforward. Users can upload or paste their text, choose a language, and ensure the text is at least 80 words long.
After clicking the “Detect AI” button, they receive a detailed report within seconds, showing both the overall score and specific sections of text that may be AI-generated. Users can then revise any highlighted areas and re-scan their text if needed.
QuillBot’s AI Detector is free to use and can analyze any type of text. It not only identifies AI-generated content but also offers additional tools like a paraphraser, grammar checker, summarizer, citation generator, plagiarism checker, and translator.
3. Scribbr Free AI Detector
Scribbr’s AI Detector is a free tool designed to identify text generated by AI, such as ChatGPT and Copilot. It offers a highly accurate detection service for various languages, including English, German, French, Spanish, and Dutch.
Users can check short texts for free, up to 1,200 words, while a premium version allows checks for longer texts, up to 100,000 words, with unlimited scans for a year.
The tool uses advanced algorithms to differentiate between human-written content, AI-generated text, and text that has been refined using AI tools. This helps users understand how AI may have influenced their writing.
Scribbr’s AI Detector is user-friendly and does not require an account to start using it. It guarantees confidentiality, meaning users’ submissions are not stored or shared.
In addition to detecting AI-generated content, Scribbr’s AI Detector provides detailed feedback at the paragraph level, highlighting specific areas that may have been influenced by AI. This feature helps users revise their work more effectively.
The tool is particularly useful for students and professionals who want to ensure their writing is original and free from unintentional AI influence.
4. GPTZero AI Checker
The AI Detector by GPTZero is a tool designed to identify AI-generated content, particularly in educational settings. It emphasizes that results from the tool should not be used to penalize students, as there can be instances where AI is misidentified as human writing and vice versa.
Instead, educators are encouraged to use detailed writing reports for a more comprehensive assessment of student work and to create assignments that are difficult for AI to solve.
The accuracy of the AI Detector improves with the amount of text submitted. It is more reliable when analyzing entire documents compared to shorter sections like paragraphs or sentences.
The model is trained on a diverse dataset primarily consisting of English prose written by adults, which enhances its effectiveness on similar texts.
However, the tool has limitations. It may struggle to identify AI-generated text that has been significantly altered after its initial generation.
Additionally, it might incorrectly flag other types of machine-generated content as AI-written. Therefore, it is best used on more descriptive and less procedural text to yield accurate results.
5. Grammarly AI Detector
The AI Detector by Grammarly is a tool designed to help users identify AI-generated content in their writing. It provides a clear score that indicates the percentage of text that appears to be written by AI, allowing users to ensure their work is authentic before submission.
This tool is part of Grammarly’s broader suite of writing assistance features, which aim to promote responsible AI use.
Grammarly’s AI Detector can quickly assess text generated by popular AI tools like ChatGPT, Google Gemini, and Claude. It helps users understand where to refine their writing to make it sound more natural and personal.
Additionally, Grammarly offers features for plagiarism detection and citation generation, ensuring that users can submit original work with proper acknowledgment of any AI assistance.
The tool prioritizes transparency by categorizing text according to its origin, whether it was input by the user, generated by AI, or sourced from an online database. This feature allows users to clearly showcase their writing process and uphold academic integrity.
While the AI Detector is a useful resource, it’s important to note that no AI detection tool is 100% accurate. Results should be interpreted as estimates rather than definitive conclusions.
Grammarly encourages users to combine the AI Detector with other writing tools to achieve a comprehensive understanding of their work’s originality.
6. CopyLeaks AI Content Detector
The Copyleaks AI Detector is a tool designed to identify whether text has been generated by AI. It works by comparing writing samples to a vast database of human writing, allowing it to recognize patterns typical of AI-generated content.
This detector is particularly effective due to its extensive training on trillions of documents collected from universities and businesses worldwide.
One of the standout features of the Copyleaks AI Detector is its high accuracy rate, claiming over 99% accuracy. This is achieved through a combination of large-scale data analysis and advanced machine learning techniques. The tool is also capable of detecting AI-generated code and can identify plagiarism even if the code has been altered.
To ensure reliability, the Copyleaks AI Detector has specific minimum and maximum text requirements for scans. For example, the browser extension requires at least 350 characters, while the web-based platform can handle documents up to 2,000 pages long. This volume of text helps the model detect irregular patterns more effectively.
The tool is designed to minimize false positives, with only a 0.2% chance of human-written content being mistakenly flagged as AI-generated.
Copyleaks has implemented feedback mechanisms and thorough testing processes to continuously improve the accuracy of its detection models.
While some features of writing assistants like Grammarly may be flagged if they involve AI rewriting, basic grammar corrections typically do not trigger the AI Detector.
Copyleaks prioritizes user privacy and security, complying with global standards such as GDPR and SOC certifications, and ensuring that user data is handled responsibly.
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7. Undetectable AI
Undetectable AI is a web-based tool that lets you check whether a piece of text was written by an AI.
You simply paste your text into their AI Detector, click “Check for AI,” and within seconds you see how likely it is that your text would be flagged by major detectors like GPTZero, OpenAI’s detector, QuillBot, Copyleaks, Sapling, Grammarly, and ZeroGPT, all in one place.
If your content does get flagged as AI-generated, Undetectable AI’s AI Humanizer feature can automatically rewrite your text to sound more human.
With a single click, it adjusts sentence structure, word choice, and style so that your writing can achieve a 100% human-content score and bypass all major AI detection tools.
The platform is completely free to use and supports a wide range of languages beyond English, including Hindi, Spanish, Arabic, Chinese, and many more.
Its interface is designed to be intuitive, so both professionals and students can quickly navigate between detecting AI content and humanizing their text without any technical hassle.
Undetectable AI is trusted by over 15 million users worldwide and has been featured in outlets like Forbes, Business Insider, and BuzzFeed.
It’s especially popular among bloggers, SEO specialists, students, educators, and researchers who need to ensure their work stays authentic and undetectable by AI detectors.
8. Originality AI
Originality.ai’s AI Checker is a web-based tool that tells you how likely your text was generated by an AI model. You can paste your content into the checker on their website or install their free Chrome extension to analyze any text you encounter online.
The tool highlights each sentence with a probability score, so you can easily see which parts look machine-written and which parts look human-written.
Behind the scenes, Originality.ai uses a patented detection model that’s been tested against major LLMs like ChatGPT, GPT-4o, Gemini Pro, Claude 3.5, and Llama 3.1.
They focus their training on published web content and continuously update their system using “adversarial” datasets, text specifically designed to fool detectors to maintain over 99% accuracy and keep false positives below 1%.
Beyond AI detection, Originality.ai includes a full suite of content-quality tools: plagiarism checking, fact checking, readability analysis, and grammar correction.
For larger teams and enterprises, it offers API access, team management controls, end-to-end encryption, data opt-out options, and shareable reports, making it a one-stop solution for publishers, marketers, and agencies who need to verify content integrity at scale.
9. Turnitin’s AI content checker
Turnitin’s AI writing detection tool is designed to help educators identify portions of student work that may have been generated or altered using artificial intelligence tools like ChatGPT or paraphrasing software.
It provides a detailed report highlighting the percentage of text likely produced by AI, distinguishing between content that is directly AI-generated and content that has been AI-paraphrased.
This feature is integrated into Turnitin’s existing platforms, such as the Similarity Report, allowing for a seamless experience without requiring additional steps from instructors.
The tool is tailored specifically for academic writing, leveraging Turnitin’s extensive experience in analyzing student submissions to enhance its detection capabilities.
While Turnitin claims a high accuracy rate in detecting AI-generated content, it’s important to note that no detection tool is infallible.
There have been instances where human-written work was incorrectly flagged as AI-generated, particularly affecting non-native English speakers. So, use them with a pinch of salt.
10. Winston AI
Winston AI analyzes any text you provide and gives you a score from 0 to 100 indicating whether it’s human-written or AI-generated. It highlights each sentence so you can easily spot the AI-written parts.
You sign up for a free account, paste your writing or upload documents such as DOCX files or images such as PNG or JPG, and the tool uses optical character recognition to extract text from scanned files or photos before checking.
After analysis, Winston AI highlights sentences on a colored map so you can see which parts are likely AI-generated, and it also offers a plagiarism check in the same report so you can compare your text to existing sources.
This tool supports multiple languages including English, French, Spanish, German, Portuguese, Dutch, and Simplified Chinese, and there is a free Chrome extension that gives you extra credits to check web content directly in your browser.
For businesses and developers, Winston AI provides an API for easy integration into custom applications. The service keeps your data private under GDPR rules and updates its detection models every week to stay effective.
Conclusion
As AI technology becomes a bigger part of our lives, it’s essential to know whether a piece of writing comes from a human or an AI.
Thankfully, there are several free and effective AI detectors like ZeroGPT and QuillBot, that can help you spot AI-generated content. These tools are great for anyone looking to keep their writing authentic and trustworthy.
However, it’s important to keep in mind that no detection tool is perfect. To get the best results, consider using a combination of these tools.
This way, you can better understand how much AI influence is in your work and ensure that your writing remains genuine in a world where AI is becoming more common.
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