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ZeroGPT
zerogpt.com
AI Detector - Trusted AI Checker for ChatGPT, GPT5 & Gemini
AI Content Detector and ChatGPT Detector, simple way with High Accuracy. AI Checker & AI Detector Free for AI GPT Plagiarism by ZeroGPT.
Powerful AI-powered chat model available to everyone
The best AI assistant alternative to ChatGPT. ZeroGPT Chat is a conversational AI chatbot like ChatGPT but built with superpowers and deep intelligence
Text Summarizer
ZeroGPT summarizer trusted by millions, Summarizes long texts, documents, articles & papers. Reduce Your Reading Time & Get main information quickly
Text Paraphraser
ZeroGPT Free Paraphraser trusted by millions. Rephrase sentence, paragraphe, document & article with the help of AI.
Free Online Word Counter Tool
Count words, characters w/o spaces, sentences, paragraphs and pages in real time. Check top keywords density. Spelling and Grammar checker tool
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Scribbr
scribbr.com β€Ί home β€Ί free ai detector
Free AI Detector
May 20, 2025 - Start detecting AI-generated content instantly with our free AI Detector, without having to create an account.
Discussions

Can someone here PLEASE tell me what is the best FREE AI Detector that actually works/ if there isn't one: are your colleges helping fund it?
There will never be a reliable one. More on reddit.com
🌐 r/Professors
181
53
March 30, 2025
What's a good AI detector?
US Constitution was written by AI as per AI Detector Tools. They're useless and waste of time More on reddit.com
🌐 r/Blogging
41
4
August 15, 2023
Which is the best AI detection tool or website?
There are no accurate AI detectors, free or paid. Why do you want one? More on reddit.com
🌐 r/SEO
117
21
January 18, 2025
AI Detector
Here are the 11 best and most popular (not sure best) AI checkers I want to test: (How did I check popularity? I simply used SEO tools to estimate their traffic and sorted them by that. If any AI detectors are missing here, it’s because they don’t work, users don’t like them, or they’re not investing in marketing, haha, so… sorry!) If you want to avoid high detection and humanize ai content - read my tutorial How to Humanize AI & Best AI humanizers Best AI Humanizers with proofs reviewed here: https://www.reddit.com/r/DataRecoveryHelp/comments/1oqwdib/best_ai_humanizer 🎁 If you need to Humanize AI right away try this: https://aihumanizer.net - 100% Free Ai humanizer (nice human score in ZeroGPT & GPTZero, simple language) https://www.zerogpt.com/ -Β ZeroGPT CheckerΒ (My top choice. Easy to fool when you rewrite content in a conversational style.) https://gptzero.me/ -Β GPTZero AI DetectorΒ (Very inconsistent results. Since the September update it has become unstable - some texts score 0%, others 100% AI, with no clear logic.) https://quillbot.com/ai-content-detector -Β Quillbot AI CheckerΒ (Works fairly well. Can be fooled by using natural language and avoiding a rigid, formal tone.) https://www.scribbr.com/ai-detector/ -Β Scribbr AI DetectorΒ (Just an iframe of Quillbot’s checker.) https://www.grammarly.com/ai-detector -Β Grammarly AI CheckerΒ (Very weak detector, easy to trick.) Less popular AI detectors: https://originality.ai/ai-checker Originality AI CheckerΒ (Feels scammy. Almost always shows 100% AI, but if you add intentional errors it marks them as human. Very odd.) https://undetectable.ai/ Undetectable AI Detector https://decopy.ai/ai-detector/ Decopy AI Detector https://notegpt.io/ai-detector NoteGPT AI Detector https://copyleaks.com/ai-content-detector Copyleaks AI Detector https://gowinston.ai/ Winston AI Detector I would not review each pros and cons and plans intentionally. Who cares? You can look yourself. I will only get scores before and after and share with you. Reddit allows you to attach only one image per post, so, sorry! What AI detector do colleges & students use? It’s definitely Turnitin AI Checker. There’s no free way to check it without registration. I tried, and it asked whether I’m a student, instructor, or teaching assistant. I didn’t want to lie, so I quit. But I’ve read a lot of Reddit discussions, and both students and teachers give the same answer to the question: β€œHow accurate is Turnitin AI Detector?” The simple answer: Not accurate. Haha! Lots of false positives and easy to manipulate with special prompts. Ok let’s do a simple test of the rest popular best AI detectors and checkers: For this test, I’ll generate a simple essay titled β€œWhat is an AI Detector and How Do They Work?” (500 words). Then I’ll show you the score before and after some basic humanization using simple prompts.I’m intentionally skipping web-based AI humanizer tools because I already covered those in this tutorial.I’ll use ChatGPT 4.1 Mini – fast and cheap. I assume a lot of writers and students might be using this specific model. More on reddit.com
🌐 r/DataRecoveryHelp
75
182
June 16, 2025
People also ask

What is the best AI detector?
GPTZero is consistently rated the most accurate and reliable AI detector across various use cases. Reliability: In 2025, G2 ranked GPTZero the #1 most trusted and reliable AI tool, above Grammarly. Accuracy: GPTZero is the most accurate AI detector with 99% accuracy rates across diverse datasets, independently reviewed by AI labs at top institutions. Independent reviewers, including Tom's Guide, testing all popular detectors named GPTZero the most accurate. Best Interpretability: GPTZero is the only detector that explains exactly why text is AI with natural language. GPTZero also has the most
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gptzero.me
gptzero.me
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
What is the best AI Detector?

Copyleaks is an industry leader in accuracy, scalability, integration, and security. 

Several significant differences exist between our AI content detection tool and the rest of the market. For example:

  • We use large-scale, credible data with machine learning to understand text patterns, resulting in over 99% accuracy.
  • We offer seamless API and LMS integrations.
  • The detector can analyze and identify AI-generated code, even if altered.
  • Our AI checker doesn’t flag non-AI features of Grammarly, like spell check and grammar, unlike other tools.
  • All Copyleaks products are fully GDPR-compliant and certified to SOC 2 and SOC 3 standards.
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copyleaks.com
copyleaks.com β€Ί home β€Ί ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
Can the AI content detector tool suggest improvements for my content?
Noβ€”Scribbr’s AI Detector will only give you a percentage between 0% and 100% that indicates the likelihood that your text contains contains AI-generated, AI-refined, or human-written content.
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scribbr.com
scribbr.com β€Ί home β€Ί free ai detector
Free AI Detector
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GPTZero
gptzero.me
AI Detector - Free AI Checker for ChatGPT, GPT-5 & Gemini
Best free AI detector - simply paste your text to instantly get an overall AI score and advanced sentence by sentence detection.
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Grammarly
grammarly.com β€Ί ai-detector
AI Detector: Free AI Checker for ChatGPT, GPT5 & Gemini
Use Grammarly's free AI detector to identify content generated by ChatGPT, GPT5, and Gemini. Our AI checker provides reliable and free results, no sign-up needed.
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QuillBot
quillbot.com β€Ί ai-content-detector
AI Detector & AI Checker - Detect ChatGPT, GPT-5 & Gemini Text
QuillBot's Free AI Detector - Use our AI checker to analyze text and identify content generated from ChatGPT, GPT-5, Gemini, Claude, and other AI platforms.
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Surfer
surferseo.com β€Ί ai-content-detector
Free AI Detector | Surfer
Surfer's AI content detector uses algorithms and machine learning techniques to analyze writing patterns, use of language, and other linguistic elements that are characteristic of AI generated content writing.
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Originality AI
originality.ai
AI Detector - Most Accurate AI Content Checker for ChatGPT - Originality.ai
Most Accurate AI Detector for all AI writing tools. Try now for free. ... See if text has been plagiarized from anywhere on the internet. ... AI-powered content optimization that helps your content predictably rank better in Google.
Find elsewhere
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BypassGPT
bypassgpt.ai
BypassGPT: Free AI Detector & Undetectable AI Bypasser
Our AI bypasser goes beyond bypassing AI detectors and helps you rank higher with keyword-rich, SEO-friendly content. We don't just help you bypass AI detection. Our AI humanizer gives you high-quality AI content that sparks interest and drives ...
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NoteGPT
notegpt.io β€Ί ai-detector
AI Detector & Checker - Trusted, Free for ChatGPT, Claude, Gemini
Finding it hard to identify AI-generated text, images, or content? Our free online AI Detector is the perfect solution. No login required! Easily check AI-generated materials with accuracy, whether it's text, images, or other content.
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Copyleaks
copyleaks.com β€Ί home β€Ί ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
Scan up to 25,000 characters for freeβ€”more than any other major AI detector on the market. Create a free account to unlock more monthly credits for scans. It’s the highest free scan allowance you can get.
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Gowinston
gowinston.ai β€Ί home
The Most Trusted AI Detector | ChatGPT Detection Tool
December 27, 2022 - Color coded visualization of your content that sounds synthetic and that might be triggering AI detectors. Our Chrome Extension is easy to use and will help you check AI content generated anywhere you go on the web. Get 1,000 extra free credits when you install it.
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Smallseotools
smallseotools.com β€Ί ai-content-detector
AI Content Detector - Detect AI Text (Free, No SignUp)
The AI checker free tool is here to assist you in detecting AI-generated content. You can paste the text you want to inquire about on this AI check tool and get to know if some or all parts of it are generated through Chat GPT AI.
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GPTinf
gptinf.com β€Ί detector
Free & Unlimited AI Content Detector | Check Text for AI Patterns
Free AI content checker that analyzes writing structure and patterns to estimate AI usage. Instant insights, no registration required.
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SciSpace
scispace.com β€Ί home β€Ί ai detector
AI Detector & Checker for Text, PDFs | Fast & accurate - SciSpace
SciSpace AI Detector instantly spots ChatGPT, GPT-4, Gemini, Llama and Claude’s text, rates originality, and explains risky lines. Proven to outperform GPTZero, ZeroGPT, and Grammarly.
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WRITER
writer.com β€Ί ai content detector
AI content detector | ChatGPT detector & AI checker for GPT-4 - WRITER
October 14, 2025 - Check what percentage of your content is seen as human-generated with this free AI content detector tool. Paste in text or a URL to find out.
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Undetectable AI
undetectable.ai
AI Detector & AI Checker for ChatGPT (Free) - Undetectable AI
One of the best ways to check if AI wrote something is to use Undetectable.ai, which is entirely free and provides a comprehensive detection score across 8 different detector models ...
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Ahrefs
ahrefs.com β€Ί writing-tools β€Ί ai-content-detector
Free AI Content Detector
Detect AI-generated content and rewrite it to sound human with our AI Content Detector. Paste your text and get accurate, human-like results in seconds!
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AI Detector
isgen.ai
AI Detector | The Most Accurate AI Checker for ChatGPT & More
To do this, simply paste the text ... and use the relevant model for processing. Indeed, you may check for AI-generated content using the free AI detector provided by Isgen.ai....
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BrandWell
brandwell.ai β€Ί ai-content-detector
The AI Detector is a Real-time AI Checker and ChatGPT Detector |
October 22, 2024 - The AI Detector detects content marketing done with ChatGPT, Gemini, and Claude. Built-in plagiarism scanner. 100% free. Start your AI Checker scan now.
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Quetext
quetext.com β€Ί ai-detector
AI Detector | AI Content Detector for ChatGPT, GPT4 & Gemini
September 23, 2022 - Quetext AI detector can identify text generated by AI platforms, like ChatGPT, Gemini & more. We use the most up-to-date NLP for AI content detector.