AI Detector
Estimate AI-written probability
Paste text, get confidence scores, and humanize weak sections.
Input text
Detection results
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Run the detector to see AI probability and detailed analysis.
AI Detector
Add text to ParaphraserPro's AI Detector and get a detailed report on how AI tools may have been used to create the content.
Paraphrasing and grammar checking tools are ethical uses of AI writing technology. They help millions of non-native English speakers and writers refine their text and express their ideas fluently. But most AI detectors can't tell the difference between text that's been created with generative AI tools—such as ChatGPT, Gemini, Claude, and others—and text that's been refined using assistive tools. This leads to false positives and cultural bias. So we built a more reliable AI detector.
Why choose ParaphraserPro's AI Detector
Detailed analysis
Know exactly which part of the text appears to be AI-generated with line-by-line breakdown and comprehensive scoring.
High accuracy
Advanced models trained on millions of texts for highly accurate AI detection results you can trust.
Downloadable reports
Download in-depth PDF reports for every detection with complete analysis and breakdown.
Multilingual support
Supports all major languages including English, Spanish, French, German, and more with accurate detection.
Fast
Receive your AI detection report within seconds using state-of-the-art machine learning algorithms.
Smart Detection
Distinguishes between AI-generated content and ethically refined text using assistive writing tools.
The Technology Behind ParaphraserPro's AI Detector
ParaphraserPro's AI Detector analyzes patterns to estimate the likelihood that a text is human written or AI generated. Instead of flagging individual words, our detector notices structural signals like repetition, generic language, and lack of variation in tone. Our detector works because it is trained on large sets of human- and AI-written texts. It uses metrics such as perplexity (how predictable the text is) and burstiness (how much sentence length varies) to identify writing patterns typical of machines. When the result is unclear, our model tends to classify texts as human written, which reduces false positives.
How to use AI Detector
Add content
Input your text and prepare it for AI detection analysis.
- •Upload or paste your text into the AI Detector
- •Select language: Choose English, French, German, or Spanish
- •Check length: Make sure your text is at least 80 words
Run scan
Analyze your text with our advanced AI detection algorithms.
- •Press the "Detect AI" button at the bottom of the tool
- •Get detailed results in just a few seconds
- •Receive a total score and line-by-line report
Review & Edit
Interpret results and make necessary revisions to your content.
- •Review any highlighted sections of text
- •Rewrite any AI-generated sections if needed
- •Run another scan to double-check your revisions
Perfect for any project
Work projects
The last thing you want is to turn something in to your boss that wasn't created by you. Use our AI Checker to update your project with your original work.
Blog posts
Make sure your content reaches its audience. Algorithms will penalize your text if it contains too much AI. Originality sets you apart, grows your following, and builds trust.
Research papers
Important papers you write for school or work should let your original writing shine. With ParaphraserPro's AI Detector, you can feel confident that the text you turn in meets your standards of ethical AI usage.
Class assignments
Take the stress out of analyzing your students' work with our AI checker for teachers. By clearly distinguishing between AI-generated and AI-refined text, you can avoid false positives and biases.
Supporting writers at top institutions