AI detector free tool: Catch AI content with our thorough AI checker
Detect AI-written, AI-paraphrased, and human text in seconds. Use this reliable AI checker to get sentence-level analysis with clear explanations — all for free.
What Is an AI Detector
An AI detector tool catches telltale signs of AI-generated writing in the text you provide. With it, you can see which passages are likely to be AI-generated and which ones are likely human-written. Educators often turn to AI detectors to verify that their students wrote their papers themselves, without turning to ChatGPT or its likes.
AI detection is, at its basis, pattern recognition, since AI writing tools create highly predictable text. Human-written content, in turn, is more unpredictable and random.
Our free AI detector analyzes sentence structure, length, word choice, and overall text variability to make a judgment call.
How to use the AI Detector
Our AI detection tool applies sophisticated analysis to find AI content in your text. Here is how to detect AI writing in four simple steps. The process is fast, safe, and requires no account or sign-up.
1. Add your text
Paste your text in the box or upload a file with your paper. Our AI checker free tool supports texts up to 12,000 characters and files up to 10 MB (.txt, .pdf, .docx).
2. Hit "Check text"
Press the button to detect AI content in your text. Our tool will catch AI "tells" (if there are any) and calculate the score; it'll take several seconds.
3. Get your score
Our AI detection tool returns an AI content score, which is the share of the text likely generated by AI. You'll also see an analysis summary that will explain why the score is high or low.
4. Browse sentence-level analysis
Check out the sentence-by-sentence breakdown below the score. It'll highlight AI-generated, AI-paraphrased, and human-written sentences in different colors. A detailed breakdown below it will tell you why this or that sentence is likely AI-generated.
How Our AI Detector Identifies AI-Generated Text
Human writing is more unpredictable, context-specific, and, yes, random than AI content. So, to calculate how likely this or that text is to have come from AI, our AI detection tool analyzes it for predictable patterns. If the text lacks variability in sentence structure, vocabulary, or content itself, that's usually a sign of AI content.
Besides, certain phrases like "In today's fast-paced world" are frequently used by AI writing tools. So, our AI text detector will flag sentences with them as likely AI-generated. On the other hand, surprising turns of phrases and word choices will mark the sentence as likely human-written.
AI detectors tend to work best when presented with longer texts. So, try to avoid checking short snippets.
Why Use Our AI Detector
Get a quick analysis of your text's authenticity with our AI writing detector.
Sentence-by-sentence breakdown
See which exact sentences are likely to be generated or paraphrased by AI with our AI detection tool. Use our tool's analysis to improve them.
Mixed content detection
If parts of your text were paraphrased using AI tools, you'll be able to spot them. Our tool also returns an AI score for the whole text.
Easy-to-grasp explanations
Understand why this or that passage was flagged as AI-generated or AI-paraphrased with our tool's detailed sentence analysis.
Built to detect AI writing in academia
Check your writing before submitting the paper without a single worry. We fine-tuned our AI writing detector for academic style and conventions.
How to interpret the results
Don't overthink it. Our AI checker provides three separate categories so you can quickly interpret the analysis and take action.
Human-written content
Human writing is more random and unpredictable than machine-generated text. It relies less on formulaic phrases and more on rich, often simpler vocabulary.
- Smooth flow of ideas and consistent tone
- Simpler word choice, without formulaic phrases
- Natural variation in word choice and sentence structure
- Context-specific details that enhance the text's key points
AI-generated content
Tools like ChatGPT, Claude, and Gemini create text that reads banal and lacks specifics. Our ChatGPT checker detects those "tells" like way too many transitional phrases and sophisticated, overly polished word choice. View our detailed AI check results to understand which "tell" our tool caught.
- Lack of a common thread throughout the text
- Reliance on stock phrases and formulaic sentences
- Lack of specifics; banal and generic wording
- No references to concrete examples
AI-paraphrased content
Some sentences may preserve the writer's original idea but still carry signs of AI involvement. Our tool highlights them as well — and adds a confidence score for each sentence.
- Synonym swapping (even when unfit for context)
- Pattern-based sentence-level restructuring
- Active-passive voice swapping (even when inappropriate)
About confidence scores
Every analysis includes an overall AI score from 0 to 100 percent. A score closer to 0 suggests the text is predominantly human-written. A score closer to 100 suggests it is predominantly AI-generated. Scores in the middle range indicate mixed content or content where the AI detection system has lower certainty. No AI detection tool is 100 percent accurate, and results should be used as one data point among many when evaluating content authenticity. We encourage a responsible attitude and recommend against using any single score as the sole basis for important decisions.
Who uses DetectMy?
Even if you're not a student who prefers to cut corners with AI-generated essays, you might still want to run a check to avoid false alarms. Here's who stands to benefit from our AI detector.
Students who use AI for outlining or research
Relying on AI tools to get ideas, find sources, or prepare outlines? They save you tons of time, but you still risk tripping an alarm — even if you did all the writing yourself. Run a check to weed out the parts that could come across as AI-generated.
Students who refine their writing with AI tools
Do all the research yourself but turn to AI assistants to improve your rough drafts? That might leave those pattern-like traces that indicate AI involvement. Use DetectMy to catch and remove them before submitting your paper.
Students who need an originality checker for peace of mind
Do all the writing yourself, no AI tools in sight or in mind? The sad reality is, your papers might still get falsely flagged as AI if the text is too predictable. You're especially at risk if English is your second language or your field's conventions mandate formulaic sentences. Run an AI scan to minimize the risk of unfair accusations.
Educators looking for an AI checker for student papers
Have a sneaking suspicion a student's paper may have been created or changed with AI? Run a scan on it before discussing it directly with them — but keep in mind that its results are a hint, not solid proof.
Reviews for our AI detector are in!
Students and educators alike can have peace of mind thanks to our tool. Here's what they think about DetectMy.
High School Student
"I'm so grateful for the detailed analysis, it tells me what exactly I should change to improve my text. With other tools, I just have to guess."
English Teacher
"It's probably the most thorough detector I've seen so far, with its explanations and confidence scores."
Law Student
"So happy I can just upload my paper to have it checked!"
MBA Student
"good for international students, turnitin often says my writing is ai but it's not, i prevent it with this detector now, it helps"
Pre-Med Student
"A super great AI scanner, it tells me where to add specifics or change wording, and it's free!!!"
History Professor
"For a free tool, DetectMy is quite accurate and very transparent re: why it thinks a sentence is AI."
Frequently asked questions
Everything you need to know about how to detect AI writing and how to interpret your results from DetectMy.
Separate authentic writing from AI content with DetectMy
Make sure your text comes across as human-written with an AI detector built to be confidential, transparent, and accurate. DetectMy's AI detection capabilities can catch even edited AI-generated text and the use of AI paraphrasers.
Privacy-first detection
We don't retain your texts after our tool analyzes them for AI content, nor do we use them for any purpose besides AI content detection.
Confidence scores
Know exactly how accurate our tool's AI detection and analysis are with confidence scores for every sentence.
Free for everyone
Check up to 12,000 characters for free, no account necessary. Run as many checks as you need to submit your paper with peace of mind.
Detailed breakdown
Stop guessing why your own writing doesn't pass an AI detection check. Find out how to improve it from DetectMy's clear explanations for each sentence and the whole text.