ZeroGPT

ZeroGPT is a free-to-start AI detector that scores pasted text or uploaded files for machine authorship, highlights the sentences it flags, and adds a PDF report for documenting the result. Around the detector sits a wider writing suite including plagiarism checking, paraphrasing, summarizing, grammar and a humanizer.

ZeroGPT is an AI content detector built around a check-and-highlight workflow. Text is pasted into the box on the homepage (up to 15,000 characters per run on the free tier) or uploaded as a file, and the model returns a percentage score estimating how much of the passage was machine generated. Detection is not limited to a single verdict: each sentence judged to be AI written is highlighted individually, so an editor can see exactly which lines triggered the score rather than guessing why a document failed. Paid plans raise the per-check limit to 350,000 characters and allow batch file uploads that queue in a dashboard. The engine behind the checks is branded DeepAnalyse. ZeroGPT describes it as a multi-stage method that moves from document-level signals down to sentence-level ones, trained on internet text, educational datasets and synthetic output produced across many language models. The site claims 98.4 percent detection accuracy, a false positive rate under 1 percent, and coverage of more than 35 LLM families including ChatGPT, Gemini, Grok, Claude, DeepSeek and LLaMa. It also claims support for all languages. Every detection can produce a PDF report, which is the feature aimed at people who need to document an originality check rather than simply read a score. The tool is aimed at a broad audience: teachers and admissions staff screening submissions, editors and publishers vetting freelance copy, SEO and marketing teams auditing content pipelines, and developers who want detection inside their own products through the API. ZeroGPT is less a single-purpose detector than a small writing suite, since the same account reaches a plagiarism checker, a paraphraser, a summarizer, a grammar checker, a translator, a humanizer and smaller utilities such as a word counter and citation generator. Image and video detectors extend the same question to visual media. Set against dedicated detectors, the appeal is breadth and price of entry rather than forensic depth. Rival tools often concentrate on a narrower set of models or a single media type. ZeroGPT bundles many checks in one place and in practice works well as a first-pass filter, provided results are treated as probabilistic signals rather than proof.