Toolical © 2026

AI Detector

Detect whether a given text was written by AI or a human. Paste your content and get an instant AI detection result.

Result
Please check your inputs.
Copy the text you want to analyze (article, essay, email, etc.). Paste the content into the input field on the tool page. Click the 'Detect' button to start analysis. Wait a few seconds for the result, which shows a percentage likelihood of AI authorship. Review the highlighted sections and confidence score to decide your next step.

๐Ÿ“– How to Use This Tool

Copy the text you want to analyze (article, essay, email, etc.).
Paste the content into the input field on the tool page.
Click the 'Detect' button to start analysis.
Wait a few seconds for the result, which shows a percentage likelihood of AI authorship.
Review the highlighted sections and confidence score to decide your next step.

๐Ÿ“ What Is AI Detector?

An AI detector is a tool that analyzes text to determine whether it was written by an artificial intelligence model or a human. It works by looking for patterns typical of AI-generated content, such as uniform sentence structure, low perplexity (predictability), and lack of natural variation. This matters because AI-generated text is increasingly used in academic, professional, and creative contextsโ€”knowing its origin helps verify authenticity, avoid plagiarism, and maintain trust. For educators, editors, and businesses, an AI detector acts as a first line of defense against undisclosed AI use, ensuring that human effort and integrity are properly valued.

๐Ÿงฎ Formula

The tool uses a machine learning model that outputs a probability score: P(AI) = f(perplexity, burstiness, token statistics). Perplexity measures how surprised the model is by the textโ€”lower values indicate more predictable (AI-like) writing. Burstiness captures variation in sentence length and structure; human writing tends to have higher burstiness. Token statistics include the frequency of certain words or phrases common in AI output. These three factors are combined into a single score between 0 and 100, where higher numbers mean greater likelihood of AI generation.

๐Ÿ’ก Tips for Best Results

โœจ๐Ÿ” Use the detector before publishing or submitting content to catch accidental AI usage.
โœจโœ๏ธ For best accuracy, test longer texts (100+ words) โ€” short snippets yield less reliable results.
โœจ๐Ÿ“Š Combine results with manual review โ€” no tool is 100% perfect, especially with heavily edited AI text.
โœจโšก If you need to rewrite flagged AI content, inject your own voice and vary sentence length to reduce detection.

โ“ Frequently Asked Questions

Is the AI detector 100% accurate?
No, but it is highly reliable on longer texts and typical AI writing patterns. Like all detection tools, it can occasionally misclassify human writing as AI or vice versa, especially with very short or highly edited content.
Can I fool the AI detector by rewriting AI text?
Partially. The detector looks for deeper patterns beyond simple word swaps. Adding personal anecdotes, varying sentence length, and introducing minor errors can reduce detection, but the core statistical signature may still be caught.
Does the tool work with non-English texts?
It is optimized for English, where the training data is strongest. Support for other languages is limited and accuracy may drop significantly. We recommend using it primarily with English content for reliable results.

๐Ÿ”— Related Tools