ZeroGPT.cc
ZeroGPT · AI Detection
ZeroGPT.cc is a free AI detector that scores any text, highlights the sentences that read like machine writing, and checks ChatGPT, GPT-5, Claude, Gemini and other models right in your browser.
About ZeroGPT.cc
What Is ZeroGPT.cc
ZeroGPT.cc is a free online tool that reads a passage of text and tells you how much of it looks like it came from an AI model. You paste your text, click Detect AI Text, and get a percentage plus a sentence-by-sentence breakdown that colors each line yellow, orange, or red depending on how strongly it reads as machine writing. There's no account to make and no cost.
The tool targets the same problem publishers, teachers, and marketers keep running into: it's getting hard to tell a human draft from a generated one, and the stakes are real in classrooms and on company blogs. ZeroGPT.cc leans on a mix of machine learning and language analysis to guess where a text came from, and it covers a wide range of models, including GPT-3, GPT-4, GPT-5, LLaMA, Claude, Gemini, and Grok.
The honest limits matter as much as the features. Detectors work on style, not proof. A high AI percentage from this AI checker doesn't confirm a machine wrote the text, and a low one doesn't clear it. Short passages carry too little signal to judge well, and formal or heavily polished writing tends to trip the checks. The site claims accuracy above 99% based on its own tests, so treat that as the vendor's number and not an independent result.
Getting Started
- Open zerogpt.cc. Nothing to install and no signup step.
- Paste the text you want to check into the box, up to roughly 1,000 words per run.
- Click Detect AI Text. The overall AI percentage and the sentence highlights appear at once.
- Read the sentence breakdown to find the lines that scored highest, since those are the ones worth rewriting.
- Run the text through the readability checker or the split tool if you want a closer look before you edit.
Product Information
A quick look at ZeroGPT.cc's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Students
- Teachers and professors
- Content marketers and SEO writers
Tasks
- Checking a draft before it goes live
- Spotting the passages that read most like AI
- Comparing two versions of the same text
- Confirming a document wasn't tool-written
Scenarios
- A student wants a second read on an assignment before the deadline, without paying for a subscription.
- An editor filters a stack of freelance pitches and needs a reason to push one back to the writer.
- A blogger checks a post for the flat, machine-like tone that readers and search engines both punish.
Key features
AI Percentage With Sentence Highlights
This AI content detector returns one overall score and then breaks it down line by line, marking each sentence in yellow, orange, or red to show how strongly it reads as AI. That per-sentence view is the part most people act on, since it turns a vague percentage into a short list of lines to fix. A few flagged sentences in an otherwise human draft usually points to a pasted or machine-polished passage rather than a fully generated one.
Support for Many AI Models
ZeroGPT.cc says it can spot text from most of the major language models, not just ChatGPT. The list includes GPT-3, GPT-4, GPT-5, LLaMA, Claude, Gemini, Grok, and tools built on top of those models. It also handles multiple languages, which matters if you work with mixed-language content. Language support is a broad claim, and the site doesn't publish per-language accuracy figures.
Readability Score
A separate readability checker tells you how simple your sentences are. Shorter, cleaner sentences score higher, and dense or compound ones push the reading level up, which hints that the text may be hard for readers to follow. It's a useful companion to the AI score, since both point at the same thing: writing that reads too smooth or too tangled.
Split Tool for Long Text
The detector caps a single run at around 1,000 words. If your document is longer, the split tool cuts it into sections so you can check each one without trimming the text by hand. That's a small convenience, but it's the difference between being able to check a full article and having to leave parts of it out.
API Integration
The team offers an API so you can plug detection into your own apps, workflows, or systems and automate the checks. The site sells this as a way to fold AI detection into a larger content pipeline rather than running every piece by hand. Availability is advertised, but the pricing and quota details live behind a request step, so small teams should ask before planning around it.
Works in the Browser With No Signup
You open the page, paste your text, and get a result without creating an account or installing anything. The site says it processes checks in real time and doesn't store the text you submit once the result comes back, which helps with unpublished or client material. There's no word limit on how many checks you can run, only on how much text goes into a single one.
Pros and cons
Pros
- Free to use with no signup and no cap on how many checks you run.
- Sentence-level highlights turn a vague percentage into a short list of lines to fix.
- Covers a wide range of models, including GPT-5, Claude, Gemini, and Grok, plus multiple languages.
- Readability score gives a second angle on why a passage reads too smooth or too dense.
- The split tool lets you work through long documents instead of trimming them first.
Cons
- It reads style, not authorship, so a high percentage is a signal you still have to interpret.
- Short passages carry too little signal, and false positives climb on them.
- Formal, technical, or edited writing gets flagged more often, which can hurt honest work.
- The 1,000-word cap per run means long documents need the split tool before you can check them whole.
- The 99% accuracy claim comes from the company's own tests, not an independent study.
Frequently asked questions
Yes. The checker is free to use with no signup and no cap on the number of checks, and it includes the readability checker and split tool at no cost.
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