GPT-Minus1 is a free, browser-based tool that modifies text by replacing random words with synonyms. It helps users make AI-generated text appear more natural or evade detection algorithms. While useful for quick edits or content transformation, the output may require human review to maintain clarity and coherence. It’s ideal for casual use, content experimentation, or students seeking an AI paraphrasing layer.
AI Cheat Check is a fast and educator-friendly AI detection tool built to identify GPT-written text in academic settings. It boasts high accuracy, an easy-to-use interface, and real-time results — all while remaining free to try online. Ideal for teachers verifying student originality, especially in essay-style responses. Institutions can request advanced access for broader deployment.
Detect GPT is a free Chrome extension that tells you if text on a webpage was likely written by AI. It runs in the background, highlights AI-generated content, and lets you manually check any paragraph. It’s simple, fast, and perfect for students, teachers, and anyone curious about AI-written content.
WasItAI is a tool that checks whether an image was made by a human or generated by AI. Just upload or paste a link, and it gives you a score showing how likely it is to be AI-generated. It’s fast, easy to use, and doesn’t store your images. Developers can also use its API to check images automatically in their apps.
GPTZero is an AI-generated text detection tool that identifies whether content was written by a human or AI. It offers sentence-level analysis, document scoring, and real-time browser scanning. Free users get 10,000 words/month. Paid plans unlock higher limits and team features. Accessible via web, Chrome extension, and API, GPTZero is widely used in education, hiring, and content verification.
Copyright Check AI is a fully automated, end-to-end solution to protect brands from costly copyright infringement in social media content. It audits historical and new posts, monitors influencer collaborations, delivers actionable reports, and sends timely alerts. Users report significant risk reduction, estimating avoidance of tens of millions in potential lawsuits.
Polygraf AI Content Detector is a web-based tool that detects if text is written by AI or a human. It highlights AI-generated parts, analyzes writing flow, and works automatically. A free plan is available (2,500 characters/month), with paid upgrades for more features .
Grimly AI is a security platform that protects LLMs from prompt injection, jailbreaks, and semantic threats. It filters inputs in real time, supports custom rules, audit logging, and integrates with major LLMs, offering cloud or on-premise deployment.
Originality.ai is a content authenticity tool for publishers, marketers, and educators. It detects AI-generated text and plagiarism, offers real-time scanning, browser and WordPress integration, and API access. It supports teams, offers both subscription and credit-based pricing, and includes a free plan with 3 daily scans (up to 300 words each).