Free AI Detector

Free AI Text Detector

Check any text for AI-generated content — instantly, for free, with no account required. Our AI detection tool analyzes your text across multiple linguistic dimensions and returns a detailed probability score in seconds. Your text is never stored or shared.

How to Use the Free AI Detector

Getting started takes less than 30 seconds. No registration, no email, no credit card. Just paste and analyze.

Step 1: Paste Your Text

Copy the text you want to analyze and paste it into the detector input box on our homepage. The text can be anything: an essay, article, email, report, blog post, or any other written content. You need a minimum of 25 words for the analysis to run, though we recommend 150 words or more for the most accurate results.

Step 2: Click “Check for AI”

Once you have pasted your text, click the “Check for AI” button. Our system will analyze your text across multiple linguistic signals including perplexity, burstiness, and consistency patterns. The analysis typically completes in 2-5 seconds depending on text length.

Step 3: Review Your Results

You will receive a detailed results panel showing:

• AI Likelihood Score: A percentage indicating how likely the text is to have been generated by an AI model. Higher percentages indicate stronger AI signals.
• Perplexity breakdown: How predictable the text is from a language model’s perspective.
• Burstiness breakdown: How much variation exists in sentence structure and complexity.
• Consistency breakdown: How uniform the writing style is across the text.

These individual breakdowns let you see exactly which signals contributed to the overall score, giving you the context to make an informed judgment rather than relying on a single number.

What You Get with the Free Tool

• Instant analysis: Results delivered in seconds, not minutes. No queues, no waiting.
• No sign-up required: Use the tool immediately. No account creation, no email verification, no friction.
• Full signal breakdown: See perplexity, burstiness, and consistency scores alongside the overall AI probability. Other free tools often hide this detail behind a paywall.
• Privacy-first design: Your text is processed in real time and immediately discarded. We do not store, log, index, or share any text submitted to our free tool.
• Unlimited basic checks: Run as many analyses as you need for personal and educational use.
• No watermarking or tracking: We do not inject watermarks, tracking pixels, or any identifiers into your text or results.

Who Is This Tool For?

Our free AI detector serves a wide range of users who need quick, reliable AI content analysis:

Educators and Academic Professionals

Screen student submissions for AI-generated content as one input in your assessment process. Use the signal breakdown to identify which aspects of the writing raised flags, and combine detection results with your professional judgment and knowledge of the student’s capabilities.

Students

Check your own writing before submission. If you used AI tools for brainstorming or outlining but wrote the final text yourself, our detector can help you confirm that your work reads as authentically human-written. Understand how detection tools evaluate text so you can advocate for yourself if questions arise.

Content Creators and SEO Professionals

Verify the originality of content from freelance writers, content agencies, or your own team. Ensure that published content meets your editorial standards for authenticity. Screen content before publication to maintain quality and trust with your audience.

Editors and Publishers

Add an AI detection check to your editorial workflow. Quickly screen submitted articles, guest posts, and contributed content to ensure it meets your publication’s standards for original, human-crafted writing.

Recruiters and Hiring Managers

Evaluate cover letters, writing samples, and other application materials. While AI detection should never be the sole factor in a hiring decision, it can provide useful context when evaluating candidate submissions.

Technical Capabilities

Our free AI detector is built on the same core technology as our full platform. Here are the technical specifications:

Supported Text Types

• Essays, articles, and blog posts
• Academic papers and research writing
• Business reports and professional correspondence
• Creative writing and fiction
• Technical documentation
• Cover letters and resumes
• Marketing copy and website content

Text Length Requirements

• Minimum: 25 words. Below this threshold, there is insufficient data for meaningful statistical analysis.
• Recommended: 150-500 words for best accuracy. This range provides strong signal extraction across all four analytical dimensions.
• Maximum: 15,000 characters per analysis (approximately 2,500 words). For longer documents, we recommend analyzing representative sections separately.

Language Support

Our models are optimized for English-language text (American and British English). The tool will process text in other languages, but accuracy is significantly lower for non-English content. We are actively expanding multilingual support and will update this page as new language models are added.

AI Models Detected

Our detection system is trained to recognize text generated by all major large language models, including GPT-4, GPT-4o, GPT-3.5, Claude (all versions), Gemini, LLaMA, Mistral, and other widely used models. Because our approach is based on statistical text analysis rather than model-specific watermarks, it also works on text from less common or open-source models.

Our Privacy Commitment

Privacy is not a feature we added — it is a foundational design principle. Here is exactly what happens to your text:

1. You paste text into the detector.
2. The text is sent to our analysis server over an encrypted (HTTPS) connection.
3. Our models analyze the text and generate a score.
4. The score and breakdown are returned to your browser.
5. The submitted text is immediately discarded from server memory. It is not written to any database, log file, or storage system.

We do not use submitted text to train our models. We do not share text with third parties. We do not retain any record of what was analyzed. For complete details, see our Privacy Policy.

When to Consider Premium

The free tool covers individual use cases well. You may want to consider a premium plan if you need:

• API access: Integrate AI detection into your own platform, LMS, or content management workflow.
• Batch processing: Analyze multiple documents at once rather than one at a time.
• Extended text limits: Process longer documents beyond the 15,000-character free limit.
• Team features: Shared dashboards, usage tracking, and collaborative workflows for organizations.
• Priority processing: Guaranteed fast response times during high-traffic periods.
• Detailed reports: Downloadable PDF reports with full analysis breakdowns for documentation purposes.

Visit our Pricing page for current plan details and to explore whether a premium plan fits your needs.

Common Questions About the Free AI Detector

Is the free tool really free?

Yes. The free tier of AI Text Detector requires no payment, no credit card, and no account registration. You can use it immediately and as often as you need for personal and educational use. We offer premium plans for teams and organizations that need advanced features, but the core detection tool is genuinely free.

How accurate is the free version compared to premium?

The free tool uses the same core detection models as our premium plans. The underlying analysis is identical. Premium plans offer additional features like API access, batch processing, and extended limits — not a different or better detection engine.

Can I use the free tool for professional or commercial purposes?

The free tool is designed for individual and educational use. If you are integrating AI detection into a commercial workflow, processing large volumes of text, or need API access for your platform, we recommend reviewing our premium plans, which include commercial usage rights and higher throughput limits.

What happens if the tool gives an incorrect result?

No AI detection tool is 100% accurate. If you receive a result that seems incorrect, consider the factors that affect accuracy: text length, editing level, writing style, and writer background. We always recommend using detection results as one data point among several, never as sole evidence. Read our Accuracy & Limitations page for detailed guidance on interpreting results responsibly.

Do you support languages other than English?

Our models are primarily trained on English text and deliver the best results for English-language content. The tool will accept and process text in other languages, but accuracy is significantly reduced. We are actively working on expanding our multilingual capabilities and will announce new language support as it becomes available.