Unfox AI Content Detector

Check whether your text is likely AI-generated or human-written with Unfox AI Detector. Get clear AI detection results with sentence-level analysis for content from ChatGPT, Claude, Gemini, DeepSeek, and other AI models.

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Built to check AI traces from ChatGPT, Claude, Gemini, and multilingual writing workflows

ChatGPT and OpenAI
Claude
Gemini
DeepSeek
Grok
Qwen
Kimi
Doubao
ChatGPT and OpenAI
Claude
Gemini
DeepSeek
Grok
Qwen
Kimi
Doubao

Understanding Your AI Detection Results

An AI detection score is a probability-based signal, not proof of who wrote the text. Unfox analyzes writing patterns across your content and shows how strongly different sections resemble AI-generated or human writing.

AI

Text marked as AI shows stronger patterns commonly associated with AI-generated content. A higher AI score means the detector found more signals consistent with machine-generated writing.

Suspected AI

Suspected AI indicates that the writing contains mixed or less conclusive signals. This can happen with heavily edited AI text, highly structured human writing, or content that combines human and AI-assisted writing.

Human

Text marked as Human shows patterns more consistent with human-written content. This does not certify authorship, but indicates that the AI detector found fewer signals associated with AI-generated writing.

AI detection, explained

What Is an AI Content Detector?

An AI content detector analyzes text to estimate whether it is more likely to be AI-generated or human-written. It looks for linguistic and statistical patterns commonly associated with AI writing rather than searching for copied text or specific words.

Unfox AI Detector helps you check for AI across essays, articles, reports, marketing copy, and other written content. It provides an overall detection result along with sentence-level signals, giving you more context than a single AI score.

How Does Our AI Detector Work?

Unfox uses AI detection models to analyze writing patterns and identify signals associated with AI-generated and human-written text.

01

01 — Analyze the Text

The AI detector examines linguistic and structural patterns throughout the submitted text rather than judging individual words in isolation.

02

02 — Identify Writing Patterns

The system evaluates patterns such as predictability, sentence variation, and other statistical signals that may differ between AI-generated and human writing.

03

03 — Generate Detection Results

Unfox turns these signals into an overall AI detection result and sentence-level analysis, helping you identify which parts of the text may deserve closer review.

AI detection results are probability-based signals, not proof of authorship.

Core Features of Unfox AI Detector

Get more than a simple AI check. Unfox combines detailed text analysis with practical tools for individual users, content teams, and larger workflows.

Sentence-Level AI Detection

Go beyond one overall percentage. Unfox highlights sentence-level signals so you can quickly identify which parts of your text are more likely to contain AI-generated patterns.

Multi-Model Detection

Check writing from major AI models, including ChatGPT, Claude, Gemini, and DeepSeek. Unfox is designed to identify AI writing patterns across different generative AI systems.

Multilingual AI Detection

Use the AI checker across 17 supported languages, including English, Chinese, Japanese, German, French, Spanish, Korean, and more.

Batch Detection & API

Need to check more than one document? Use batch detection for larger content volumes or integrate the Unfox AI detection API into your own platform and workflow.

Built for the Way You Review Content

Whether you're checking your own writing, reviewing someone else's work, or managing content at scale, Unfox gives you a practical way to see where AI-generated patterns may appear.

Students and educator reviewing work in a classroom

Students & Educators

Students can review essays, assignments, and other academic writing before submission. Educators can use AI detection as one additional signal when reviewing student work, especially when questions about authorship or AI assistance come up.

Writer reviewing content on a laptop

Writers & Freelancers

Check drafts, articles, and client work to see whether AI-assisted writing or editing may have changed the way the content reads. It can be useful as a final review step before delivering or publishing content.

SEO planning notes arranged on a desk

SEO & Content Teams

Review blog posts, landing pages, outsourced articles, and other marketing content before they go live. Teams can use detection results to flag content that may need a closer look rather than relying on a simple AI or human label.

Editor reviewing a publishing interface

Editors & Publishers

Scan submitted articles, manuscripts, and other written content for potential AI signals. Sentence-level results can help editors identify sections worth reviewing more closely.

Business team reviewing creative work together

Businesses & Agencies

For teams handling content across multiple clients, departments, or projects, Unfox can help bring AI detection into an existing review workflow. Batch detection and API access can make it easier to check larger volumes without adding a separate manual step for every piece of content.

Supported Languages

Covering Global Mainstream Languages

Unfox AI detector supports 17 mainstream languages worldwide, providing accurate AI content detection results regardless of your language.

🇨🇳简体中文
🇺🇸English
🇯🇵日本語
🇩🇪Deutsch
🇫🇷Français
🇪🇸Español
🇧🇷Português
🇷🇺Русский
🇸🇦العربية
🇳🇱Nederlands
🇨🇿Čeština
🇮🇳हिन्दी
🇮🇩Bahasa Indonesia
🇮🇹Italiano
🇰🇷한국어
🇹🇷Türkçe
🇻🇳Tiếng Việt

Real-time Multilingual Detection

Enter text in any language and the system will automatically identify the language and provide precise AI detection results.

Accuracy & context

AI Detection Accuracy & False Positives

AI detection is not a simple yes-or-no judgment. Detection models look for patterns commonly associated with AI-generated writing, so results are best understood as signals rather than absolute proof.

Unfox continuously evaluates and refines its detection models as AI writing tools, editing techniques, and writing styles continue to change. Results can vary depending on factors such as text length, writing style, AI-assisted editing, paraphrasing, and highly structured or formulaic content.

What About False Positives?

A false positive happens when human-written content shows patterns that resemble AI-generated writing. This can sometimes occur with academic, technical, or highly structured text, where consistent phrasing and predictable patterns are more common.

That’s why Unfox is designed to give you useful evidence to consider—not a verdict to accept blindly. Use the result alongside the original writing, context, and your own judgment for a more informed assessment.

View AI Detection Testing Methodology
Unfox AI detection test report showing sentence-level signals and detection results
Example detection reportSentence-level analysis

Built for Real-World Content Review

AI detection is most useful when it helps you review content with more context and confidence.

Know What to Review

Unfox helps you spot sections that may deserve a closer look. Use the result as a helpful signal—not a final verdict on who wrote the content.

Keep Your Content Private

Checking an essay, client draft, or internal document? Your content is not stored after detection and is discarded after analysis.

Check More When You Need To

Review multiple documents with Batch Detection, or connect the Unfox API when AI detection needs to become part of your own workflow.

Learn More About AI Detection

Curious about AI detection? Explore practical guides to help you understand AI detection and make better use of your results.

View all AI detection guides
Accuracy
99.8%

In a test set of millions, our AI detector's false positive rate is below 0.2%.

Detections Daily
5 Million+

The AI checker trusted by users worldwide.

Data Security
100%

We never store your content. It is immediately discarded after detection. Your privacy is safe the moment you hand it to our AI content detector.

Testimonials

What Users Say About Our AI Detector

Writers, educators, and content teams rely on Unfox to review AI-generated text with clarity.

"I run student essays through Unfox before I review them, and it still catches lightly rewritten AI sections without overreacting to normal edits."

Dr. Elena Moore
University professor

"For our SEO team, the AI content detector is a fast first pass. It helps me catch filler paragraphs before they reach publish."

Nina Patel
SEO editor

"The confidence score gives me a clear starting point. It is much easier to triage a long article with a signal like that."

Marcus Chen
Content operations lead

"We work in two languages, and Unfox has been surprisingly consistent on both English and Chinese drafts. That matters in localization review."

Sara Kim
Localization manager

"The privacy-first workflow is a big deal for us. I can check client copy and internal docs without worrying about content being retained."

Daniel Reed
Agency director

"When writers use AI for brainstorming, I still need to know which sections need a human rewrite. This makes editorial review faster."

Maya Thompson
Editorial manager

"I tested it on paraphrased, polished text and it still surfaced the patterns I was looking for. That is the signal I need in QA."

Owen Brooks
Quality reviewer
FAQ

Questions About AI Detection?

Here are answers to some of the questions we hear most often.

01How accurate is the Unfox AI Detector?

Unfox analyzes linguistic and statistical patterns to estimate whether text is more likely to be AI-generated or human-written. Like any AI detection tool, it cannot guarantee 100% accuracy. Results can vary depending on text length, writing style, paraphrasing, AI-assisted editing, and other factors. We recommend using the detection score and sentence-level results as signals for further review rather than definitive proof of authorship.

02Can AI detectors be wrong?

Yes. AI detectors can produce both false positives and false negatives. Human-written content may sometimes show patterns associated with AI, particularly when the writing is highly structured, formulaic, or heavily edited. Similarly, AI-generated text may not always be identified correctly. For this reason, an AI detection result should be considered alongside the writing context, source material, and other available evidence.

03Can Unfox detect ChatGPT, Claude, Gemini, and DeepSeek?

Yes. Unfox is designed to identify AI writing patterns associated with major generative AI systems, including ChatGPT, Claude, Gemini, and DeepSeek. AI models continue to evolve, so detection systems also need to adapt to new writing patterns. Results indicate how strongly submitted text resembles AI-generated writing rather than proving which specific model created it.

04What does an AI detection score mean?

An AI detection score represents how strongly the submitted text shows patterns associated with AI-generated writing. A higher AI score indicates stronger AI-associated signals, while a higher Human result indicates patterns more consistent with human writing. The score is a probability-based signal, not a definitive statement about authorship. Sentence-level results can provide additional context by showing which parts of the text contributed to the overall result.

05Can Unfox detect mixed human and AI writing?

Yes. Unfox can analyze text at the sentence level, which helps identify sections that show stronger AI-associated patterns within a larger document. This can be useful when human-written content has been combined with AI-generated or AI-assisted passages. However, mixed writing can be more difficult for any AI detector to classify consistently, so individual sentence results should still be reviewed in context.

06Can I use Unfox to check an essay or academic paper?

Yes. Unfox can be used to review essays, assignments, papers, and other academic writing for patterns associated with AI-generated content. Students can use it as a self-check before submitting work, while educators can use it as one input during content review. AI detection should not be used alone to determine academic misconduct or make decisions that could significantly affect a student's academic standing.

07Do I need to sign up to use the AI Detector?

Unfox is designed to make AI detection accessible without unnecessary steps. If your current free detector allows users to run a check without creating an account, you can paste or upload your content and start the detection directly. Any usage limits or account requirements should be clearly shown in the detector interface so users know what to expect before running a check.

08Does Unfox store my text?

Unfox is designed with a privacy-first detection workflow. According to the current product policy, submitted content is not stored after detection and is discarded after analysis. This allows users to review essays, unpublished articles, client drafts, and other sensitive content with greater confidence. For specific retention, security, or enterprise requirements, users should also refer to Unfox's current privacy and data-handling policies.

09What languages does Unfox support?

Unfox supports AI detection across 17 languages, including English, Simplified Chinese, Japanese, German, French, Spanish, Portuguese, Russian, Arabic, Dutch, Czech, Hindi, Indonesian, Italian, Korean, Turkish, and Vietnamese. The system can identify the language of supported content and analyze it for patterns associated with AI-generated writing.

10Can an AI detector prove who wrote something?

No. An AI detector can estimate whether text contains patterns associated with AI-generated writing, but it cannot establish who actually wrote the text or prove that a specific person used AI. Detection results are best used as one part of a broader review that may include writing history, drafts, source material, and other relevant evidence.

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