Free AI Detector – Verify Human & AI-Generated Text

Detect AI-generated content instantly with our advanced checker. Paste text from ChatGPT, GPT-4, GPT-5, Gemini, Claude, or Llama to analyze authorship, burstiness, and probability scores. 100% free and confidential.

Input Content for Analysis
0 characters 0 words
AI Detection & Authorship Analysis
-- %

Probability of AI-Generated Content

AI-Generated --%
Human-Written --%
Awaiting text input for verdict...
AI Humanizer Humanize AI Text

Advanced AI Detection & Content Analysis Features

Experience industry-leading accuracy with our free AI checker. Designed for students, educators, and SEOs to verify authenticity, detect plagiarism, and identify LLM outputs like ChatGPT and Gemini.

How to Check for AI Content

Analyze Text Now

Frequently Asked Questions about AI Detection

1. What is an AI detector and how does it utilize NLP?

An AI detector is a tool that uses Natural Language Processing (NLP) to analyze text for patterns typical of Large Language Models (LLMs) like ChatGPT, GPT-4, and Gemini. It evaluates metrics like perplexity and sentence structure to determine authorship.

2. How does the AI checker distinguish between human and AI text?

Our checker analyzes 'burstiness' (sentence variation) and 'perplexity' (unpredictability). Human writing is bursty and unpredictable, while AI text is statistically probable and uniform. We assign a confidence score based on these linguistic markers.

3. How do I use this tool to bypass AI detection?

  1. Paste your draft to identify high-probability AI sentences.
  2. Rewrite the highlighted sections to increase variance and personal insight.
  3. Re-scan to verify that the content now reads as human-written.

4. How accurate is the detector for GPT-5 and mixed content?

While no tool is 100% perfect, our detector achieves high accuracy rates for major models. It is specifically tuned to identify 'mixed content' where human writers have used AI for editing, helping you understand the nuance of the text.

5. Can I use these results for academic integrity verification?

Yes, our tool is widely used by students and teachers for academic verification. However, we recommend using the results as a preliminary check alongside other methods, as false positives can occur with heavily edited text.

6. Does this AI detector store or save my text/data?

No. We adhere to strict privacy standards. Text submitted for analysis is processed in real-time via volatile memory and is never stored, archived, or used to train our models. Your data is deleted immediately after the session.

7. Which AI models (ChatGPT, Claude, etc.) can it detect?

Our algorithms are updated weekly to detect the latest models, including ChatGPT (all versions), GPT-4, GPT-5, Claude 3, Gemini (Bard), and Llama 3. We also detect text from rephrasing tools.

8. How long does the AI analysis process take?

Analysis is near-instantaneous. Most texts are processed in under 2 seconds. Longer documents (over 1,000 words) may take slightly longer as we perform deep-level linguistic analysis.

9. Does it support AI detection in other languages?

Yes. AIDetectorTool.io supports multilingual detection including Spanish, German, French, Portuguese, and Russian, utilizing language-specific training data for maximum accuracy.

10. Can I download the AI probability report?

Yes. After analysis, you can download a comprehensive report in TXT or DOC format, detailing the AI probability score and highlighting specific sections for review.