Description
Unfox AI is a free AI content detector that identifies AI-generated text and highlights the subtle patterns that separate machine writing from human writing. It is built to flag content from ChatGPT, Claude, Gemini and other models, and works even on text that has been rewritten or polished to hide its origin.
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The detector is powered by a proprietary large model that analyzes signals such as perplexity and burstiness, then returns a sentence-level report that marks each sentence as AI-suspected or human-written rather than only a single score. It supports 17 mainstream languages and automatically identifies the input language before analyzing it.
Unfox is aimed at educators, content teams, recruiters and website operators who need to review text authenticity — checking student essays, editorial copy, cover letters or full-site content. It offers bulk document uploads and an API so detection can be embedded into existing workflows, and it is free to use with no registration.
- CategoryAI Content Detectors
- Pricing ModelFreemium
- DeploymentCloud
- PlatformsWeb
Unfox AI's Core Features
Deep-learning AI detection engine analyzing perplexity and burstiness
Sentence-level highlighted report marking AI-suspected vs human-written text
Detects output from ChatGPT, Claude, Gemini and other models
Multilingual coverage across 17 mainstream languages
Real-time automatic language identification
Bulk document uploads for high-volume review
API integration to embed detection into workflows
Free to use with no sign-up required
How to use Unfox AI?
Paste your text: Enter or upload the content you want to check.
Run the detector: Unfox analyzes the text and identifies the language automatically.
Review the report: See an overall confidence score with each sentence marked AI-suspected or human-written.
Act on results: Revise flagged passages or scale up with bulk uploads and the API.
Unfox AI's Use Cases
- Education
- Content creation
- Recruitment & due diligence
- Website operations
