AI detection tools
13 tools available
CheckforAi—an AI detector developed by a high school student, a free legend with a 99% accuracy rate that puts commercial giants to shame.
CheckforAi is a high-precision AI text detection tool created in 2023 by Stanford online high school students. Utilizing Transformer neural networks and hard negative sample mining techniques, it achieves 99% accuracy and an extremely low false positive rate in comprehensive benchmark tests. Completely free to use, it offers risk scoring and in-depth analysis capabilities, aiming to help educators and content creators maintain originality.
Proofig – a guardian of research integrity who uses AI to perform "CT scans" on academic papers, leaving no room for image fraud.
Proofig is an AI-powered academic image integrity detection platform designed specifically for scientific publications. It automatically identifies image tampering, duplication, plagiarism, and AI-generated images, and compares manuscripts against over 155 million publicly available images on PubMed. It is used by top publishers such as the Science family of journals for pre-submission image screening to maintain research integrity.
StudyCorgi ChatGPT Detector—a completely free AI detection tool that uses "word color" to tell you which words look too much like AI writing.
StudyCorgi ChatGPT Detector is a free AI detection tool designed for students and teachers. It identifies machine-generated content by analyzing the probability of each word in a text being used by AI. It provides visual color-coding, allowing users to view the AI generation probability and possible alternative words word by word, with no usage restrictions. It is suitable for academic use in detecting AI-generated content in papers and assignments.
Winston AI – the "gold standard" of AI content verification, boasting 99.98% accuracy, is a content verification tool used even by teachers and HR professionals.
Winston AI is a self-proclaimed industry-leading AI content verification tool used to identify whether text and images are AI-generated. It boasts a 99.98% accuracy rate, supports multiple languages including Simplified Chinese, and offers OCR text extraction, browser plugins, and detailed verification reports. It is suitable for educational institutions, SEO professionals, publishers, and individuals who need to verify the authenticity of content.
Writer AI Content Detector—a completely free AI-powered "seven-dimensional scoring" tool, even GPTZero users use it as a backup.
Writer AI Content Checker is a completely free online tool for identifying whether text was generated by AI. It evaluates text across seven dimensions, providing a clear probability of whether it was written by a human or AI. No registration is required, there are no usage limits, and a convenient Chrome extension is also available. It's ideal for teachers, editors, and content creators who need to quickly and frequently screen content.
Sapling AI Content Detector—a "truth serum" from a former Google researcher—can it see through the tricks of GPT-5 and Claude 4.5?
Developed by a former Google researcher, Sapling AI Content Detector is a tool for identifying whether text is generated by AI. It claims a detection rate of over 97% for AI-generated content and a false positive rate of less than 3% for human text. It supports the latest models such as GPT-5, Claude 4.5, and Gemini 2.5, can process PDF and DOCX files, and offers a browser extension for convenient on-the-go detection on web pages.
Writecream AI Content Detector—an AI content detector boasting 99% accuracy—is it a sharp eye or Schrödinger's cat?
Writecream AI Content Detector is an online tool that identifies whether text is generated by AI, claiming an accuracy rate of up to 99.12%. It can detect content generated by models such as ChatGPT, providing real-time analysis, originality scoring, and automated reporting. It is primarily aimed at SEO, academia, and the publishing industry.
Zhuque AI Detection Assistant: Tencent's Free AIGC Content Recognition Tool
Zhuque AI Detection Assistant is an AI generated content detection tool heavily developed by Tencent's hybrid security team Zhuque Laboratory. It can identify the text content generated by the mainstream big models such as ChatGPT, Claude, DeepSeek, ERNIE Bot, Tongyi Qianwen with high accuracy, and
Copyleaks: A professional AI content detection and plagiarism detection tool
Copyleaks is an AI based originality detection platform. Its core capability is the ability to accurately distinguish between human written and AI generated content (such as ChatGPT, Gemini, Claude, and other models), while comparing massive databases to identify plagiarism and similarity in text,
Originality.ai - Professional AI Content Detection and Quality Control Platform
Originality.ai is an AI content detection and quality control platform designed specifically for web publishers, content marketers, and SEO professionals. It was launched in November 2022, just a few days before the public release of ChatGPT, and is one of the earliest commercial AI detectors on
Smodin - Multi in One AI Writing and Content Detection Platform
Smodin is a multi in one AI writing platform launched in 2017, integrating AI writing, text rewriting, AI detection, humanized processing, plagiarism detection, translation, summarization and other tools into one workspace. The platform supports over 100 languages and has over 1 million global
AISEO - the world's leading AI content generation and GEO optimization platform
AISEO is an AI content generation platform that focuses on SEO and GEO (Generative Engine Optimization). Unlike traditional AI writing tools, AISEO not only helps users quickly generate high-quality blog posts and web content, but its core capability lies in its "AI Humanizer" feature - the ability
GPTZero is a globally leading AI content detection and academic integrity platform
GPTZero was founded by Princeton Chinese alumni Edward Tian and Alex Cui in January 2023, and is a leading global AI content detection platform. It can accurately detect whether text, images, audio, and video are generated by AI, and supports recognition of mainstream models such as ChatGPT, GPT-4,