ChatGPTCheckerChatGPT Checker & AI Content Detector
Paste any text and instantly find out if it was written by a human or generated by ChatGPT, GPT-4, Gemini or Claude. A fast, accurate, free GPT detector — no login, no word limits, no catch.
AI detection gives a probability estimate — use it as a helpful signal. Your text is never stored.
What is a ChatGPT checker?
A ChatGPT checker is a tool that analyzes writing and estimates how likely it is to have been produced by an AI language model. As tools like ChatGPT and GPT-4 make it effortless to generate essays, articles, emails and social posts, telling human writing apart from AI writing has become harder than ever. This free AI content detector was built to close that gap in seconds.
Unlike a plagiarism scanner, an AI detector doesn't compare your text against a database of existing sources. Instead, our GPT detector studies the statistical fingerprints of the writing itself — how predictable each word is, how sentences are structured, and how much natural variation the text contains. Human writing tends to be less predictable and more varied, while AI-generated text is usually smoother and more uniform. Our model learns those patterns and turns them into a single, easy-to-read AI probability score.
Whether you need a ChatGPT detector to verify student submissions, an AI text detector to keep your blog authentic and Google-friendly, or you just want to check whether a message was written by a bot, this tool gives you a clear percentage and highlights the exact sentences that look AI-generated.
How the AI detector works
Check any text for AI in seconds — no account, no software to install.
Paste your text
Drop in an essay, article, email, cover letter or any writing you want to run through the ChatGPT checker.
Run the GPT detector
Our AI detector scores how likely each sentence was generated by ChatGPT, GPT-4 or another large language model.
Read your result
See the overall AI percentage instantly, plus every sentence highlighted by how likely it is to be AI-written.
Who uses this ChatGPT detector
From classrooms to newsrooms, anyone who needs to tell human writing from AI writing.
Teachers & educators
Screen student essays and assignments for ChatGPT and other AI before grading.
Students
Make sure your own writing reads as human and won't be falsely flagged by an AI checker.
Writers & bloggers
Keep your content authentic and protect your search rankings from AI-flagged text.
Editors & publishers
Quickly check freelance and guest submissions with a reliable GPT detector.
SEO & marketing
Verify that outsourced articles are genuinely written, not mass-produced by AI.
Recruiters & HR
Spot AI-written cover letters and applications during hiring.
Why use this ChatGPT checker
Instant results
Get an AI probability score and sentence-level highlights in a couple of seconds.
Free & unlimited
No sign-up, no credit card, no word caps. Run the AI content detector as often as you like.
Detects every major model
Works on ChatGPT, GPT-4, GPT-4o, Gemini, Claude, Llama and other large language models.
Sentence highlighting
See exactly which sentences are most likely AI-generated — not just a single number.
Multi-language
This AI text detector works across many languages, not only English.
Private by design
Your text is used only to run the check and is never stored or shared.
What makes our AI content detector different
Most AI detectors either hide the good stuff behind a paywall or hand you a single mysterious number. Our ChatGPT checker is completely free and shows its work: alongside the overall AI score, it highlights each sentence so you can see precisely where the AI writing is concentrated.
It's also built for real-world text. Writing is rarely 100% human or 100% AI — people edit ChatGPT drafts, and AI tools rephrase human notes. Instead of a black-and-white pass or fail, this GPT detector gives you a nuanced percentage plus sentence-level detail, so mixed documents are handled honestly. And because there's no login and no limit, you can check as much text as you need.
Tips for accurate AI detection
ChatGPT checker — frequently asked questions
Is this ChatGPT checker really free?
Yes — it's 100% free with no sign-up, no login and no usage limits. Check as much text as you want, as often as you want.
How accurate is the AI detector?
It gives a reliable probability estimate for most text, but no AI detector on the market is perfect. Treat the score as strong guidance rather than absolute proof, especially for short passages or heavily edited writing.
Which AI models can it detect?
Our GPT detector recognizes text from ChatGPT (GPT-3.5), GPT-4, GPT-4o, Gemini, Claude, Llama, DeepSeek, Mistral and most other large language models.
Can it detect GPT-4 and GPT-4o?
Yes. The AI content detector is tuned to catch the newer, more natural output from GPT-4 and GPT-4o, not just older models.
Does it work on paraphrased or humanized AI text?
It often does. Rewriting AI text lowers the score, so heavily humanized content may land in the middle range rather than at the top — the sentence highlights still help you see which parts read as AI.
Can teachers use it to check student work?
Yes, many teachers use it as a first-pass ChatGPT detector. Because no detector is 100% accurate, use the result as one signal alongside your own judgment before making a decision.
Does the AI detector work in other languages?
Yes. It detects AI-written content across many languages, not only English.
Is there a word or character limit?
There's no daily limit on how many checks you can run. Each individual check accepts long passages — just paste your text and hit Detect AI.
How is this different from a plagiarism checker?
A plagiarism checker compares your text to existing sources to find copied passages. This AI text detector instead analyzes the writing style itself to estimate whether it was generated by AI — two different problems.
Do you store the text I check?
No. Your text is only processed to return your result and is never saved or shared.