AI Tools: Free AI Detector

Surfer AI Detector is a powerful free tool that identifies AI-generated text from models like ChatGPT and Gemini by analyzing patterns in tone, repetition, and structure using machine learning and statistical models. It delivers instant probability scores, grammar checks, style suggestions, and basic plagiarism signals, helping users maintain content authenticity effortlessly. Trusted by over 150,000 users including Shopify and Zapier, it's invaluable for SEO professionals, educators, and compliance teams seeking reliable initial screening in English text.

YouScan AI Detector is a free, privacy-focused tool that instantly analyzes text for AI generation, providing an authenticity score and actionable feedback to make content sound more human. Supporting multiple languages and formats with no data storage or sharing, it helps ensure genuine communication in a world flooded with AI content. Ideal for marketers, writers, developers, and anyone refining drafts before publishing on platforms like LinkedIn.

Originality.ai is a leading AI and plagiarism detection suite tailored for publishers, educators, marketers, and writers seeking to verify content authenticity. It delivers top accuracy in detecting output from advanced models like GPT-5, GPT-4, ChatGPT, Claude, and Gemini, complemented by a plagiarism checker boasting nearly 99.5% accuracy across the web. With multiple specialized detection models, seamless integrations such as Chrome extensions and APIs, plus tools for fact-checking, grammar, and readability, it empowers teams to maintain high standards in content quality and compliance. This comprehensive platform is essential for professionals prioritizing trust and originality in digital publishing.

Check-Plagiarism.com AI Detector is a free online tool designed to identify AI-generated text from major language models like ChatGPT, Gemini, and Copilot by analyzing linguistic patterns and semantics. It provides quick percentage scores distinguishing human from AI content, supports multiple languages, and handles various formats via simple paste or upload. Ideal for educators spotting cheating in assignments, content moderators tackling spammy posts, and anyone needing accessible AI verification without costs.

Smodin AI Detector is a rapid, multilingual tool that scans text and documents to identify AI-generated content with claimed 95-99% accuracy across 100+ languages. It delivers real-time results, highlights suspicious passages, and offers sentence-level analysis, all while prioritizing user privacy by not storing data. Ideal for educators, students, content creators, and professionals seeking quick originality checks to uphold authenticity amid rising AI use.

Summarizer.org AI Detector is a free, user-friendly tool that identifies AI-generated, human-written, or mixed content using advanced AI and NLP models trained on outputs from ChatGPT, Gemini, Claude, and more. It provides instant, color-coded reports with detection scores for long-form text, helping maintain content authenticity without any signup or privacy risks. Ideal for SEO teams, bloggers, and educators needing quick originality checks before publishing.

14-day free trial / Stop bots and human abuse / Privacy focus / Frictionless user experience - From $99/month

Free trial / AI Voice Generation / Voice Cloning / Deepfake Detection - From $5/month

/ Protect your LLM-powered applications / Safeguard against prompt injection attacks, hallucinations, data leakage, toxic language

Securely Erase / Anti Spy / Antivirus AI - From $3.00 SGD for Bee Sponsorship

2-minute chat / Social Turing Game / Identify human or AI bot

Up to 3 printers free / Remote Access / AI Failure Detection / Notifications - From $5.99/month