Our AI detector and AI checker are 99.8% accurate and 100% free to use. Check any text for AI-generated content from ChatGPT, Claude, Gemini, and more.
Used by over 3 million users
Phrasly is trusted by writers and professionals around the world who need to ensure their writing sounds natural, authentic, and meets academic standards.
Our AI detector and AI checker deliver results you can trust. Here's what makes Phrasly different:
Phrasly's AI checker achieves 99.8% accuracy in detecting AI-generated text from the latest models including ChatGPT, Claude, Gemini, and other AI writing tools. Our proprietary models are trained on over 1 million real human articles - not synthetic AI content - giving us deep understanding of authentic human writing patterns.
This training on genuine human writing means our AI detector can distinguish between:
Get your AI detection report in under 10 seconds. Our AI checker processes your text instantly and provides detailed results showing exactly which sections appear AI-generated. No waiting in queues, no slow processing - just immediate, actionable feedback.
Unlike other AI detectors that advertise "free" but limit you to 250-500 characters, Phrasly's AI checker is genuinely unlimited. Check as many essays, articles, or documents as you need. No character caps, no scan limits, no pressure to upgrade.
When we say free, we mean completely free.
Your content stays completely private. All text analyzed by our AI detector is processed securely and deleted immediately after analysis. We don't store your writing, we don't share it, and we don't use it to train our models.
No account required, no tracking, no data retention. Your intellectual property remains yours.
Our AI checker doesn't just give you a percentage - it shows you precisely which sentences triggered the detection. Review highlighted sections to understand what patterns our detector identified, making it easy to address flagged content if needed.
This transparency helps educators have informed conversations with students rather than relying on a simple number.
Our AI checker detects content from all major AI writing tools:
Whether your students used ChatGPT or a newer tool, our AI detector identifies the patterns.
Phrasly's AI detector is designed specifically for educational contexts. We understand that AI detection is part of a larger conversation about academic integrity, not a gotcha tool. Our checker helps:
We believe in using AI detection responsibly - as one signal in holistic assessment, not the final word.
Spot ChatGPT and other AI-generated text instantly. No signup required - just paste your text and get results in under 10 seconds.
Step 1
Add your content: Copy and paste any text you want to check for AI writing.
Choose your language: Works with English, Spanish, French, and German text.
Minimum length: Make sure your text is at least 30 words long for accurate results.
Step 2
Click "Check for AI": Press the 'Check for AI' button at the bottom of the tool.
See your score: Get a clear percentage showing how much text is AI-generated.
View detailed breakdown: See exactly which sentences our AI detector flagged.
Step 3
Check highlighted parts: Red highlights show text that looks AI-generated.
Rewrite if needed: Edit flagged sections to make them sound more human.
Test again: Run another check to see your improvements.
Our AI checker is built on proprietary models trained exclusively on millions of real human writing. We understand authentic human writing patterns at a fundamental level - not just AI patterns to avoid.
Unlike other AI detectors that rely on third-party technology, our AI checker is built on proprietary models trained exclusively on over 1 million real human articles. This means we understand authentic human writing patterns at a fundamental level - not just AI patterns to avoid.
Most detection tools analyze what AI writing looks like. Phrasly's AI detector understands what genuine human writing looks like. That difference matters for accuracy.
We've invested in building our own AI detection technology from scratch. While other AI checkers simply repackage existing tools, our detector uses models developed entirely in-house. This gives us complete control over:
When ChatGPT or other AI tools evolve, we can update our AI checker immediately because we control the entire system.
False positives can have serious consequences for students and writers. Our AI checker is specifically built to reduce incorrect flagging:
Our goal isn't to catch people - it's to provide accurate, fair assessment of whether content is AI-generated or human-written.
As new AI writing tools emerge (GPT-5, advanced Claude models, next-generation Gemini), we update our AI detector to maintain accuracy. Because we control our own technology rather than licensing third-party systems, we can adapt quickly to changes in the AI landscape.
Our research team monitors developments in AI writing technology to ensure our checker stays current and reliable.
Our AI checker examines your text for patterns commonly found in AI-generated content:
Human writers naturally vary their sentence lengths, paragraph structures, and transitions. AI tends to follow more predictable patterns. Our detector identifies when text feels formulaic versus organically developed.
AI-generated content often uses safe, generic phrasing and avoids risks in word choice. Human writers include personal touches, cultural references, and unexpected expressions. Our AI checker recognizes these authenticity markers.
While AI can maintain surface-level coherence, it often lacks the depth of context and subtle idea development that characterizes human writing. Our detector evaluates how naturally ideas connect and evolve throughout your text.
AI writing often maintains unnaturally consistent quality, tone, and style throughout a document. Human writing includes natural variations, corrections, and style shifts. Our AI detector identifies these patterns.
Our tool goes beyond basic editing—it's your complete solution for creating polished, reader-friendly content.
Before submitting, run your paper through our AI detector to make sure it won't get flagged by plagiarism checkers.
Phrasly's AI Detector can help you avoid false positives by identifying AI-generated text and allowing you to make necessary adjustments.
With Phrasly, you can make sure you're publishing quality SEO content that feels human and resonates with readers.
Use AI to create reports and presentations, then use Phrasly to ensure the final product meets quality standards.
Not all AI detection tools work the same way. Here's what makes Phrasly's AI detector different:
Most AI checkers in the market simply repackage existing detection technology from third parties. Phrasly has built our own AI detection models from scratch, trained on over 1 million real human articles.
This means:
When you use our AI detector, you're using technology built specifically for accurate, fair detection - not a reskinned version of someone else's tool.
Many AI checkers advertise as "free" but hide character limits that make them unusable for real documents:
Phrasly's AI checker is truly unlimited:
Free means free. Check your entire dissertation if you want.
The quality of an AI detector depends entirely on its training data. Our AI checker is trained exclusively on over 1 million authentic human articles - not synthetic content, not AI-generated text mixed in.
Other detection tools often train on a mix of human and AI writing, or use publicly available datasets that may include low-quality content. Phrasly's proprietary training on verified human writing gives our detector a fundamental advantage in accuracy.
When you check text with our AI detector:
Many other AI checkers require accounts, store your submissions, or use your content to improve their models. Not Phrasly.
Our AI checker is built specifically for educational and professional contexts where fairness matters. We provide:
Instead of saying "This IS AI-written," we give you percentage likelihoods. This acknowledges that no detection is perfect and encourages informed judgment.
Our AI detector distinguishes between text completely generated by AI versus human writing that used AI tools for grammar checking or editing assistance.
See exactly which parts triggered detection, so you can make informed decisions rather than relying on a black-box algorithm.
This approach helps educators, students, and professionals use AI detection as a tool for dialogue and improvement - not as a punishment mechanism.
An AI detector is a tool that analyzes text and estimates how much of it was written by an AI model such as ChatGPT, Claude, or Gemini. It looks at sentence structure, word choice, and how predictable the writing is, then returns a percentage score showing how likely the content is AI generated. Phrasly runs this check in seconds and shows you a clear result.
You can use an AI detector to review essays, articles, emails, or any document before you publish or submit it. Phrasly is free, needs no signup, and has no word limit, so you can check long pieces in a single pass.
Paste your text or upload a document and Phrasly reads through it line by line. It highlights the parts most likely to be AI generated and gives an overall AI score for the whole document, so you see exactly where a detector would raise a flag rather than just a single number.
Phrasly works on plain text, essays, and full documents with no character cap. No account is required and there is no limit on how many checks you run, so you can test a draft, edit it, and check again as often as you need.
An AI scanner and an AI generator checker do the same job as an AI detector. They read your text and tell you whether it reads as human written or machine generated. If you searched for an AI scanner, an AI tester, or an AI generator checker, Phrasly covers all of them in one place. Paste your content and it returns an AI score in seconds.
The scan works on any length of text, from a few lines to a full report. Phrasly is free, requires no signup, and sets no word limit on what you can scan.
Phrasly's ChatGPT checker is built to catch text produced by ChatGPT, including newer GPT-5 output. Paste any passage and it shows how likely it is that ChatGPT or another model wrote it. Teachers use this to review submissions, and writers use it to confirm their own work reads as human.
Phrasly checks against a range of AI models, not only ChatGPT. The current list covers ChatGPT, GPT-5, Claude, Gemini, Perplexity, DeepSeek, Grok, and all major AI models.
Students use Phrasly to check essays and assignments before handing them in. If you used AI to draft or edit part of your work, an AI content detector for essays shows how an instructor's tool might score it, so you can revise anything that reads as machine generated. Phrasly gives a clear AI percentage and points to the sections that need attention.
Phrasly is free, with no word limit, so you can check a full essay in one go. It helps you confirm that your final submission reflects your own writing.
Guides from the Phrasly blog on how schools check for AI, why detectors flag human writing, and what to do about it.
68% of colleges now use AI detection and most students don't know it's already scanning their work. Find out which schools check, what tools they use, and how to protect yourself before you submit.
Read more: Do Colleges Check for AI? What Students Must Know (2026)Law schools now use AI detectors on personal statements, diversity essays, and assignments. The consequences of being flagged go beyond a rejection. From admissions certifications to bar admission risks, here is exactly what law schools check, which tools they use, and what to do before you submit.
Read more: Do Law Schools Use AI Detectors? What Applicants and Students Must KnowTurnitin flagged your essay as AI but you wrote every word yourself. False positives are real, even Turnitin admits it. Learn why it happens, what triggers the detector, and how to appeal with evidence that actually works.
Read more: Why Turnitin Flags Human Writing as AI (And How to Fix It)NoRedink doesn't detect AI. It only tracks copy-paste behavior through Originality Insights. Learn the key difference between paste detection and true AI detection, and what it means for students and teachers.
Read more: Can NoRedink Detect AI? Here's What Teachers and Students Should KnowWe tested 5 AI detection tools to find the best one. Here's our verdict for students, educators, and businesses in 2026.
Read more: Best AI Checker Tools 2026: Complete Comparison GuideGot flagged for AI writing? Here's why it happens, how to fix it fast, and what to do if your professor gets involved. Free tool included to check your score before you submit.
Read more: Why Is My Essay Detected as AI? Here’s What to DoAbsolutely not! Phrasly is committed to protecting your privacy. We do not store any of your content on our servers. All content is deleted immediately after you close the tab. We do not share content with third parties, and we do not use it for any purpose other than to check for AI.
There is no limit to how many times you can use the AI Detector. You can use it as many times as you'd like, however, text highlighting is only available to signed-in users.
Our AI writing detector is the most accurate in the industry, with an accuracy rate of 99.8%. Although we are constantly improving our algorithms, please note that no method of detection is 100% accurate. False positives are inevitable, but we are working hard to reduce them as much as possible.
To cite Phrasly's AI Detector in academic papers, you can use the following format: Author Name (Year). 'Title of the Software: Phrasly AI Detector.' Publisher, Version.
The terms "AI detector" and "AI checker" are used interchangeably and refer to the same technology. Both describe tools that analyze text to determine if it was written by artificial intelligence (like ChatGPT, Claude, or Gemini) or by a human. Phrasly's AI checker examines linguistic patterns, sentence structure, word choice predictability, and semantic flow to identify AI-generated content with 99.8% accuracy. Whether you call it an AI detector or AI checker, the functionality is identical.
Yes, our AI checker can detect content generated by ChatGPT, Claude (all versions), Google Gemini, Meta Llama, Jasper, Copy.ai, and most other large language models. The detector analyzes universal patterns in AI-generated text rather than tool-specific signatures, making it effective across different AI platforms. As new AI writing tools emerge, we update our detection models to maintain accuracy.
False positives can occur when human writing happens to match patterns common in AI-generated content. This might happen if you:Write in a very formal, academic style with consistent sentence structureUse predictable phrasing or common expressionsWrite about technical topics with standardized terminologyAre a non-native English speaker writing in simple, clear sentencesIf our AI detector flags your original work, try adding more personal examples, varying your sentence lengths, or including conversational elements. Then run the check again.
If our AI checker shows a high AI probability for your human-written text, try these strategies:For students and academic writers:Add specific examples from your personal experienceVary sentence lengths (mix short and long sentences)Include relevant anecdotes or observationsUse more diverse vocabularyRead your text aloud to ensure natural flowFor professional content:Include industry-specific insights that AI wouldn't knowAdd data or statistics with proper citationsUse active voice more than passive voiceBreak up long paragraphsInclude transitional phrases that show your thought processAfter making revisions, run the text through our AI detector again to verify improvements.If you're working with AI-generated content that you want to improve, you can use Phrasly's AI Humanizer to transform the text into more natural-sounding writing that's less likely to trigger detection.
Yes, educators frequently use our AI checker to assess student assignments. However, we strongly recommend using AI detection as one part of a holistic evaluation, not as the sole basis for academic integrity decisions. Consider:The detection percentage (higher scores warrant more attention)The student's typical writing style and abilityWhether the assignment explicitly prohibits AI useThe possibility of false positives, especially for ESL studentsHaving a conversation with the student about their writing processOur AI detector is a tool to inform judgment, not replace it. Many institutions now have clear AI usage policies that distinguish between acceptable AI assistance (grammar checking, brainstorming) and unacceptable use (having AI write the paper). Make sure students understand these boundaries.
Our AI checker achieves 99.8% accuracy, which is comparable to or better than other leading AI detection tools in the market (which typically report 95-98% accuracy for content entirely written by AI). The key differences:Accuracy: Phrasly offers industry-leading accuracy for fully AI-generated contentCost: Phrasly is 100% free with no limits; many alternatives require paid subscriptionsAccess: Anyone can use Phrasly instantly; some tools require institutional licensingPrivacy: Phrasly doesn't store content; some platforms retain submissions in their databasesDetection scope: Phrasly detects all major AI models (ChatGPT, Claude, Gemini, etc.)For students wanting to check their work before submission, Phrasly offers professional-grade AI detection technology without requiring institutional access, paid subscriptions, or compromising privacy.You can also explore our other tools: AI Humanizer to improve AI-generated text, Content Generator to create original content, and Citations Generator for proper source attribution.
AI detectors look at patterns in your text, such as how predictable each word is and how the sentences are built. AI models tend to write in statistically predictable ways, so a detector measures how closely your text matches those patterns and returns a score. A higher score means the text looks more likely to be AI generated.
Many colleges and universities now check submitted work for AI generated content, often through detection built into the tools instructors already use. Policies vary by school and by instructor, so the safest step is to confirm your own work reads as human before you submit. You can run your essay through Phrasly for free to see how it scores.
Turnitin uses its own built in AI writing detection rather than a third party tool, and it scores how much of a submission it believes was AI generated. Results can differ between tools, so checking your work in more than one detector before submitting gives you a clearer picture.
Canvas and SafeAssign focus mainly on plagiarism matching, and whether they flag AI content depends on how each school has set them up. Some institutions add separate AI detection on top. If you are not sure what your school uses, check your own work for AI content first.
Phrasly is considered as the best ai detector for students and educators because it offers unlimited free detections. Accuracy for AI checkers depends on the text and on which models are being detected, and no detector is right every time. Phrasly reports a 99.8% accuracy rate and checks against multiple AI models, which lowers the chance of a missed result. Running a second check after editing is the best way to confirm a score.
Whether AI use counts as cheating depends on the rules set by your school, instructor, or workplace. Some allow AI for brainstorming or editing but not for full drafts, and others restrict it completely. The clear approach is to follow the stated policy and use a detector to confirm your final work meets it.
Join 3,000,000+ students and writers who use Phrasly's AI content tools to write faster and more efficiently.
