AI Detector
99% accuracy backed by independent third-party studies
Learn more about our enterprise solutions suite
For writers and students, certain platforms, like Grammarly, use ChatGPT and other genAI models for key functionalities and can be flagged as potential AI content. Read the article
Detect AI-Generated Content
The Copyleaks AI text detector helps you find AI-written content with over 99% accuracy, even when it’s carefully blended with human writing. Our award-winning AI detector will help you better understand and utilize AI assistance on your blog post, essay, resume, or social caption.
With over 30 supported languages and detection for ChatGPT, Gemini, Claude, and more, Copyleaks is the go-to free AI text checker for students, writers, professionals, and creators.
With the AI Detector and award-winning Plagiarism Checker, Copyleaks provides the ultimate content integrity suite.
AI Logic: Detection. Source-backed insights. Confidence.
AI Logic demystifies detection by showing you why text has been flagged as AI-generated. AI Phrases identify text that appears in the document, displaying the statistical frequency with which it originates from AI, rather than human-generated sources. And AI Source Match identifies when any part of the submitted text already appears in content published elsewhere.
Learn more about AI Logic.
AI Detector Extensions & Integrations
AI Detector Browser Extension
Bring AI Detection Into Chrome and Edge Browsers
Scan for AI-written content instantly as you work on web editors, learning platforms, and publishing sites. The Copyleaks Browser Extension integrates directly into your workflow, helping you spot and revise flagged text before you hit “publish.”
Use Google Docs with AI Detection
Real-Time AI Detection Built Into Your Writing Flow
Quickly detect AI-written content as you work and maintain originality throughout your writing process with the Copyleaks Google Docs Add-on.
Enterprise AI Detection via API
Integrate Powerful AI Detection Into Your Own Workflow
Bring the power of the Copyleaks AI Detector to your native platform with seamless, fully white-labeled API integration.
LMS AI Detector Integration
Purpose-Built for Educators and Students
Simple LMS integration empowers student learning and originality while keeping everything educators need in one convenient place—available for Canvas, D2L, Moodle, Blackboard, Schoology, Edsby, and Sakai.
Use The AI Detector Across Multiple Languages
Copyleaks boasts one of the largest language databases for AI content detection, supporting over 30 languages with low false-positive rates for non-native English text. Whether you’re scanning content in English, French, German, Italian, Portuguese, Spanish, Japanese, Chinese (Simplified and Traditional), Russian, Dutch, or beyond, you can trust our AI Detector to deliver consistent, reliable results.
We continually retrain and refine our models to stay ahead of evolving AI technologies, particularly in the languages most widely used globally. That means accuracy you can count on, no matter the context or language.
Backed by rigorous testing, our technology leads the industry in multilingual accuracy, ensuring you can detect AI-generated content and verify originality across borders. The graphic to the right illustrates how our latest model performs in our most commonly used languages.
Want to dive deeper? Explore our AI Detector Testing Methodology.
English:
99.97% (human), 99.20% (AI)
French:
99.88% (human), 96.18% (AI)
German:
99.94% (human), 95.63% (AI)
Italian:
99.88% (human), 97.00% (AI)
Portuguese:
99.95% (human), 93.08% (AI)
Spanish:
99.85% (human), 98.02% (AI)
How to Use Copyleaks AI Detector
Step 4: Refine Your Content
Revise with confidence: Use the feedback to rewrite flagged phrases in your own words.
Re-scan your text: Make edits and run another scan to see how your changes impact the results.
Step 4: Refine Your Content
Revise with confidence: Use the feedback to rewrite flagged phrases in your own words.
Re-scan your text: Make edits and run another scan to see how your changes impact the results.
Use the Best AI Detector
Most Accurate AI Detection Tool
With over 99% accuracy and an industry-low .03% false positive rate, Copyleaks leads the field in trusted detection.
Highest Free Scan Limit
Scan up to 25,000 characters for free—more than any other major AI detector on the market.
Get Even More Scans with a Free Account
Create a free account to unlock more monthly credits for scans. It’s the highest free scan allowance you can get.
How Our AI Detector Works
Copyleaks uses a combination of linguistic modeling, deep learning, and our proprietary AI Logic to detect generative content with unmatched precision.
Our Process:
- Trained on trillions of human-written documents
- Identifies statistical patterns left behind by LLMs
- Separates AI-generated text from human input, even when mixed
ChatGPT Detection & Beyond
Go beyond a simple ChatGPT detector—get detection for all AI models, including Gemini, Claude, DeepSeek, and any new models as they are released.
Plagiarism & Paraphrased AI Detection
Have complete visibility of your content, identifying potential plagiarism or paraphrasing within AI-generated text.
Looking for an API or LMS solution?
Detect AI with Unprecedented Accuracy
The AI Content Detector is trained to recognize human writing patterns, flagging text as potential generative AI when it detects deviations from known human patterns and specific AI signals.
It’s Not AI Evasion—It’s AI Education
We’re not here to help you bypass AI detection—we’re here to help you understand it. Whether you’re a student checking if your paper might raise red flags or a writer making sure your content doesn’t read like low-effort AI, Copyleaks gives you the tools to work with AI responsibly, ethically, and transparently.
This isn’t about evading detection—it’s about learning how to utilize AI effectively and responsibly. Our all-in-one platform helps you analyze, refine, and verify your content with clarity and confidence, so you can ensure originality while still embracing AI’s potential.
An AI Detector Designed for Your Needs
For Students
Ace your assignments with confidence
Concerned that your professor might flag your paper as AI-generated? Run it through the AI Detector before you submit. Get instant clarity on what reads like AI and revise flagged phrases to make sure your work reflects your voice and effort. Stay ahead, stay original.
For Professionals
Protect your reputation and your work
Whether you’re submitting a report, proposal, or résumé, AI-generated text can raise red flags. Copyleaks helps you ensure everything you share is polished, professional, and unmistakably human. Avoid accidental AI signals and own every word you write.
For Writers
Keep your creative voice intact
From novels to newsletters, your writing deserves to sound like you. Use our AI Detector to check if AI influence is sneaking in through editing tools or drafting assistants. Get feedback, make intentional revisions, and preserve your unique tone.
For Content Creators
Stay authentic in an AI-driven world
Posting blogs, captions, or video scripts? Build trust with your audience by ensuring your content stays original. Whether you’re creating with or without AI, our detection tools help you review, refine, and maintain integrity across every platform.
Enterprise AI Detection for Businesses, Education, and More
Enterprise AI Detector Features & Benefits
Free AI Detection for Time-Sensitive Analysis
Quickly scan and detect AI-written content in any text using our powerful AI detection engine—free for up to 25,000 characters per scan.
AI Model Training
Protect the integrity of your AI systems by ensuring training data is sourced exclusively from verified human-written content.
Academic Integrity
Ensure authenticity in essays, source code, and other student work with high-accuracy detection tailored for educational use cases.
Governance
Establish guardrails for GenAI adoption. Mitigate risk, enforce policy, and maintain brand and legal compliance across your organization.
IP & Copyright
Detect unauthorized reuse and protect your intellectual property with full copyright and licensing compliance coverage.
Unauthorized LLM Usage
Ensure your proprietary content isn’t being used to train third-party language models without your consent.
Enterprise-Grade Security
Copyleaks meets the highest data protection standards, including enterprise-grade encryption, GDPR compliance, and SOC 2 & SOC 3 certification.
Customizable Sensitivity Levels
Fine-tune detection thresholds to reduce false positives or uncover more nuanced AI rewrites, perfect for complex enterprise needs.
AI-Generated Source Code Detection
Scan and verify AI-generated code for licensing violations, improper reuse, or potential vulnerabilities with our advanced code detection engine.
Oakland University AI Detector Case Study
Learn how Oakland University adopted Copyleaks and changed the conversation around AI and plagiarism among their faculty and staff.
Campaign KPIs
Ease of use & Integration, Cost-effectiveness, Customer Support, Security
Get Started Today With the Copyleaks AI Detector Tool
AI Detection FAQs
How does AI detection work?
When a Large Language Model writes a sentence, it uses all its pre-training data to create a response or an output based on statistical modeling. AI detectors can recognize this pattern and flag certain content as AI-generated because it significantly differs from the way humans write.
AI detectors can be trained on human-written content samples, so the presence of an AI text generator becomes clearer compared to human writing.
What models can the AI Detector detect?
Copyleaks can detect content from:
- GPT-5, GPT-4, ChatGPT
- Claude
- Gemini
- DeepSeek
- Llama (Meta)
- Bloom
- Rytr
- Jasper
…and more.
Does Copyleaks offer a free AI detector?
Every new user receives a limited number of free credits to explore our AI and plagiarism detection tools before committing to a paid plan.
Our Personal and Pro plans both include full access to AI detection, plagiarism checks, detailed reports, and our explainable AI Logic feature. You can find detailed pricing information on our pricing page.
For education institutions or enterprise teams that require API access, LMS integration, or customized pricing, please contact our sales team to discuss a tailored solution.
How was the Copyleaks AI detection model trained?
Using AI technology, the detector can accurately recognize AI-generated text and the signals it leaves behind, adding a layer of accuracy.
Learn more about our AI Detector testing methodologies.
What is the best AI Detector?
Copyleaks is an industry leader in accuracy, scalability, integration, and security.
Several significant differences exist between our AI content detection tool and the rest of the market. For example:
- We use large-scale, credible data with machine learning to understand text patterns, resulting in over 99% accuracy.
- We offer seamless API and LMS integrations.
- The detector can analyze and identify AI-generated code, even if altered.
- Our AI checker doesn’t flag non-AI features of Grammarly, like spell check and grammar, unlike other tools.
- All Copyleaks products are fully GDPR-compliant and certified to SOC 2 and SOC 3 standards.
Why is there a minimum and maximum text requirement for some AI Detector content scans?
Our models need a certain volume of text to determine AI presence accurately. More characters improve detection confidence.
AI Detector Browser Extension
- Minimum: 350 characters
- Maximum: 25,000 characters
AI Detector Web-Based Platform
- Minimum: 255 characters
- Maximum: 2,000 pages (no character max)
How Accurate is Copyleaks AI Detector?
The likelihood of human-written content being mistakenly labeled as AI-generated is .03%—one of the lowest among AI detectors.
We’re committed to digital trust and accuracy. To minimize false positives:
- Our algorithms distinguish human-generated text specifically.
- We utilize user feedback to enhance our models.
- New model detection is only introduced after extensive testing.
What is the most accurate AI detector?
According to Cornell University, the answer is Copyleaks AI Detector. In July 2023, a study published on arXiv by Cornell Tech researchers declared Copyleaks AI Detector the most accurate for detecting LLM-generated text.
Further independent studies have validated its accuracy and efficiency.
Does the Copyleaks AI Detector flag writing tools like Grammarly as AI content?
Not all writing tool features are flagged. Grammarly’s AI-based rewriting features may trigger detection, while basic grammar and spell-check functions typically do not.
The AI Detector is designed to distinguish between minor edits and generative rewriting, helping ensure fair and accurate analysis.
What data protection does Copyleaks have?
At Copyleaks, we prioritize data privacy and compliance. Current certifications include:
- SOC2 & SOC3
- GDPR
- PCI DSS
- NIST RMF
Visit our Compliance and Certifications and Security Practices pages to learn more.
Can the AI Detector detect mixed text where human-created text has been amended with AI-generated text?
Yes. Our detection report identifies specific elements written by humans and distinguishes them from AI-generated text, even when mixed.