Best Free AI detection AI tools

Undetectable AI scans text and images for signatures of models like GPT‑4, Gemini, and Claude, combining multiple engine results into a probability score. It handles paraphrased content, supports 50+ languages, and offers a Chrome extension and API.

Copyleaks delivers AI text and image detection, plagiarism checking, grammar correction, and text moderation in 30+ languages. It integrates via API, LMS, browser extensions, and Google Docs, supports major LLMs, and ensures secure, compliant workflows for education and enterprise.

Decopy is a free AI content detection tool with 99% accuracy, capable of identifying AI-generated text, providing detailed reports, and enhancing text quality. It supports multiple languages and is user-friendly and versatile.

MyDetector is a free tool that detects AI-generated text and humanizes it to ensure authenticity. It supports multiple languages, offers 99% accuracy, and refines content to match human-like quality.

Detector.io is an AI detection tool that scans text to identify AI-generated passages, providing a score and highlighted segments. It includes integrated tools like an AI humanizer and plagiarism checker to help refine content for authenticity.

Dechecker AI is an AI content detector that identifies text generated by models like ChatGPT, Claude, and Gemini. It provides sentence-level analysis with highlighted passages and offers rewriting suggestions to enhance originality and readability.

ZeroGPT detects AI‑generated text from models such as GPT‑4, LLaMA, Claude, and Jasper. It returns a percentage of AI content, sentence‑level flags, and a readability score, helping educators, writers, and SEO professionals verify authenticity.

The AI content checking tool uses image recognition technology with 93% accuracy rate to classify potentially indecent content and offers camera and blur protection. It can be accessed through GitHub and has a mobile demo available.

Free AI Image Detector analyzes images for AI generation with high accuracy in under 10 seconds. It supports JPEG, PNG, WEBP, and HEIC formats, providing a confidence score and authenticity explanation without storing uploaded files. No registration is needed.

TrueMedia.org offers AI-driven tools to detect political deepfakes on social media platforms, helping users assess the authenticity of video and audio content. It promotes informed discussions and addresses the challenges of misinformation in the digital landscape.

AIScanner.io is a tool that detects AI-generated text from major models like GPT and Claude, providing a 0–100 authenticity score in seconds. It identifies paraphrased content and mixed samples with continuous model updates, helping educators and professionals verify content originality.

Analyzes if an image is safe for work or not using AI.

Checkforai is an AI tool that detects AI-generated content in written text, ensuring authenticity and helping prevent plagiarism and search engine penalization.

ContentDetector.AI is a free tool that identifies AI-generated written text, including Chat GPT and GPT 3 content, and provides an estimated percentage score of AI generation likelihood.

Ai‑Spy analyzes MP3/WAV files to distinguish human from AI‑generated speech. It offers drag‑and‑drop uploads or link input, instant authenticity scores, word‑level breakdowns, exportable reports, and a SOC 2‑certified API for workflow integration.

Advacheck employs an AI engine to detect machine‑generated text from models like ChatGPT, Gemini, Llama, etc., flagging AI authorship and plagiarism with <0.5% false positives. It offers daily‑updated detection, academic integrity tools, and Moodle integration.

Detectordeia is a sophisticated tool designed to analyze texts, distinguishing between AI-generated content and human-written material by evaluating writing patterns, structure, and style.

AI Detector analyzes texts of at least 80 words to identify AI-generated content from various models. It produces detailed reports with confidence scores, aiding educators and students in evaluating academic submissions across multiple languages.

Detector AI is a free text detector that identifies AI-generated text from models like ChatGPT, Claude, and Gemini using advanced NLP algorithms. It offers a user-friendly interface for analyzing content, highlighting AI vs. human contributions, and ensuring originality for students, researchers, and creators.

AIDetector.review is an AI text detection tool that identifies AI-generated content with detailed reports and confidence scores. It offers fast, 99.2% accurate analysis for academic, publishing, recruitment, and business use cases.

HumanizerBench is a public benchmark and leaderboard that evaluates AI text humanizers on detector bypass rate, meaning preservation, and readability. It provides reproducible methodology with open-source prompts, outputs, and scoring scripts for independent verification.

Cleverhumanizer is a Clever AI Detector that estimates the probability a text was AI-generated by analyzing statistical markers like wording predictability, rhythm uniformity, and machine-like phrasing. It returns an overall probability score with sentence-level signals and confidence indicators, offering explainable probabilistic guidance rather than a binary verdict.