ZeroGPT
Free AI content detector for text analysis
💎Freemium
🌐Web
About
ZeroGPT is an AI detection tool that identifies text generated by large language models. This helps educators maintain academic integrity by flagging potentially AI-written student submissions, while also allowing students to verify their work's originality.
How to Use
- Navigate to zerogpt.com — no account required for basic use. Create a free account to unlock history, batch scanning, and API access.
- Paste your text into the detection box (up to 15,000 characters on the free plan) or upload a .txt, .doc, .docx, or .pdf file.
- Click 'Detect Text'. ZeroGPT returns an overall AI-content percentage, a sentence-level breakdown with colour-coded highlighting, and separate scores for common LLMs (ChatGPT, GPT-4, Bard, LLaMA).
- Use the sentence-level view to understand which specific passages triggered the AI flag — this is more useful than the overall percentage for having targeted conversations with students.
- For higher volumes, the ZeroGPT API lets developers submit text programmatically and retrieve structured JSON results for integration into automated workflows or LMS plugins.
- Cross-check results with the 'Paraphrase Detector' feature (available on paid plans) for text that may have been AI-generated and then manually edited to reduce detection signal.
Available On
web
✓ Pros
- •Generous free tier — 15,000 characters per scan with no account required makes it the most accessible AI detector for one-off checks by students and educators.
- •Sentence-level colour-coded highlighting with per-LLM attribution (ChatGPT, GPT-4, Bard, LLaMA) gives more specific results than tools that return only an aggregate score.
- •Multi-language support across 50+ languages broadens usefulness beyond English-dominant institutions.
- •Public API is available on free and paid plans, enabling developers and researchers to integrate ZeroGPT into custom tools without an enterprise contract.
✗ Cons
- •Accuracy benchmarks are self-reported and not independently verified — third-party evaluations show higher false-positive rates than more specialised tools like GPTZero or Turnitin's AI Writing Indicator.
- •No LMS integration or class management features, limiting practical usefulness for teachers managing regular submission workflows.
- •Free plan lacks export functionality — reports cannot be saved as PDF or shared directly, requiring manual screenshot or copy-paste for documentation.
- •The brand and domain (zerogpt.com) can cause confusion — it is a third-party detector, not affiliated with OpenAI or any official AI vendor.
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Frequently Asked Questions
How does ZeroGPT distinguish between different AI models?▾
ZeroGPT's detection engine is trained on text samples from multiple LLMs and uses pattern-based classification to attribute passages to specific models (ChatGPT, GPT-4, Google Bard, Meta LLaMA). This attribution is probabilistic — the model identifies the stylistic signatures most consistent with a given LLM's training distribution, but a high-confidence attribution to one model does not rule out others.
Is ZeroGPT affiliated with OpenAI?▾
No. ZeroGPT is an independent third-party AI detection service with no affiliation to OpenAI, Google, Meta, or any LLM provider. The name references GPT as the most prominent AI writing technology when the tool launched, but it is a standalone product built by a separate team.
What is a safe threshold score to act on in ZeroGPT?▾
ZeroGPT does not publish an official recommended threshold, but common practitioner guidance is to treat scores above 50% as warranting further investigation and scores above 80% as strong signals of AI involvement. Regardless of score, documented context (draft history, student explanation, oral follow-up) should accompany any formal academic-misconduct process.
Can ZeroGPT detect AI content in non-English languages?▾
ZeroGPT supports detection in 50+ languages including French, Spanish, German, Arabic, and Chinese. Accuracy for non-English content is generally lower than for English due to smaller training datasets in those languages, but it remains one of the broader language-coverage options among free AI detectors.
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🌍Global👩🏫Teachers👨🎓Students🎯Ethics & Detection📚General