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Top-rated AI Humanizer · Loved by 50,000+ writers

AI Content Detector

Detect AI-generated content from ChatGPT, Claude, Gemini and more. Get zero AI score with MultipleChat — analyze, humanize, and publish with confidence.

Sentence-level highlighting · Upload documents · Detect & humanize in one platform

Important: No AI detection tool is definitive. Results are statistical estimates, not proof. Scores should never be the sole basis for academic, employment, or other consequential decisions.

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Supports .txt, .docx, .pdf, .rtf

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Your text is analyzed in your browser and is not stored or shared. Privacy policy

50K+
Writers trust us
12M+
Words humanized
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AI models in one place
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User rating

How Our AI Detector Works

Advanced multi-signal analysis to estimate AI involvement in any text.

Perplexity Analysis

Measures how predictable each word is. AI chooses statistically likely words. Human writing is more surprising and varied.

Burstiness Measurement

Evaluates variation in sentence length. Humans write in bursts. AI tends toward uniform, consistent sentence structure.

Vocabulary Fingerprint

Detects 60+ overused AI phrases, hedging language, formulaic transitions, and structural patterns common in LLM outputs.

Why MultipleChat AI

Other tools just detect. We detect and fix. Get zero AI score with the only platform that combines detection, humanization, and multi-model collaboration.

Detect + Humanize

Don't just find the problem — solve it. Detect AI patterns, then humanize your text to get zero AI score. All in one workflow, one platform.

6 AI Models, One Chat

ChatGPT, Claude, Gemini, Grok, Llama, Mistral — use them simultaneously. Compare, collaborate, get better results than any single model.

Transparent Prompts

Unlike black-box tools, every humanization prompt is editable and visible. You control the process. No hidden rewrites. No surprises.

Sentence-Level Highlighting

See exactly which sentences are flagged. Color-coded results let you target revisions precisely — fix what matters, keep what works.

Upload Any Document

Upload .txt, .doc, .docx, .pdf, or .rtf files directly. No copy-paste needed. Analyze full documents in seconds.

Private & Secure

Your text stays in your browser. Nothing is stored, logged, or used for training. Swiss-operated. GDPR compliant. Learn more.

Text Flagged? Get Zero AI Score.

Being flagged doesn't mean you did anything wrong. Here's how to fix it.

1

Add your voice

Inject personal anecdotes, opinions, and specific examples. Detectors look for generic patterns — your unique perspective breaks them.

2

Vary your rhythm

Mix short sentences with longer ones. AI text is uniform. Break that pattern. One word. Then a long winding thought that goes somewhere unexpected.

3

Replace AI vocabulary

Words like "furthermore," "crucial," "delve," "leverage," and "tapestry" are AI fingerprints. Use your own words instead.

4

Humanize with MultipleChat

Our AI Humanizer uses multi-model collaboration to restructure cadence, vary patterns, and genuinely improve writing quality — get zero GPT score.

Humanize Your Text

AI Detector FAQs

How accurate is this AI detector?

No AI detection tool is 100% accurate — this includes ours and every other tool. Our detector analyzes statistical patterns in language to estimate the likelihood of AI involvement. Results should be interpreted as estimates, not conclusions. False positives and false negatives occur with all detection tools.

Can I use these results as evidence in academic or professional settings?

We strongly advise against using any AI detection tool — including this one — as the sole basis for decisions affecting someone's academic standing, employment, or reputation. Always pair automated analysis with human judgment and other evidence.

Why do AI detectors flag human-written text?

Formal, academic, or technical writing shares statistical characteristics with AI output. Non-native English speakers are disproportionately affected. This is a documented limitation across all detection tools, not specific to any one product.

What types of AI content can this detect?

The detector analyzes patterns found in text from ChatGPT, Claude, Gemini, Llama, Mistral, and other large language models. As AI evolves, outputs increasingly resemble human writing, which affects detection accuracy across all tools.

How can I get zero AI score on my text?

Use MultipleChat's AI Humanizer after detection. Unlike simple paraphrasers, it uses multi-model collaboration to restructure cadence, vary sentence patterns, and genuinely improve writing quality. Many users achieve significantly lower detection scores after humanization.

What file formats can I upload?

You can upload .txt, .doc, .docx, .pdf, and .rtf files directly into the detector. The text content is extracted and analyzed instantly. For best results, documents should contain at least 50 words of prose.

Is my text stored or used for training?

No. Text is analyzed entirely in your browser and is not sent to any server, stored, or used to train models. MultipleChat is operated by NLP GmbH in Switzerland under strict data protection standards. See our privacy policy.

What is perplexity and burstiness in AI detection?

Perplexity measures how predictable text is — AI text is more predictable. Burstiness measures variation in sentence length — humans write in bursts with mixed lengths, while AI tends toward uniform structures. Both are key signals used by all major AI detection tools.

How is MultipleChat different from ZeroGPT or other detectors?

Most AI detectors only detect. MultipleChat detects and solves the problem — our AI Humanizer uses 6 AI models collaborating to genuinely improve your writing, not just paraphrase it. Detect, humanize, and publish from one platform. Get zero AI, zero GPT score with MultipleChat.

How does the AI Humanizer differ from a paraphraser?

Paraphrasers just swap synonyms — detectors still catch them. MultipleChat's AI Humanizer uses multi-model collaboration with transparent, editable prompts to restructure cadence, vary patterns, and genuinely transform writing quality. You control every step.