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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.
Authorship VerificationPreserve originality and transparency
Detect AI-generated content in any text as you browse the internet. GPTZero's free AI detector Chrome extension supports better writing.
Pricing
The World's #1 AI Content Detector with over 8 Million Users
For teachersFoster academic integrity in the classroom
Try our AI grading assistant that ... your students.Try it for free ยท All data is secured by industry leading data protections such as AICPA, FERPA, and SOC2. ... Detect AI use in student writing. With 99% accuracy, use the worldโ€™s best AI detector to identify AI-generated ...
Plagiarism CheckerDetect content from outside sources
In our tests and third party studies, our AI detectorโ€™s accuracy is over 99% in identifying pure AI-generated content. Yes. GPTZero offers a free plan that covers up to 10,000 words per month.
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Scribbr
scribbr.com โ€บ home โ€บ free ai detector
Free AI Detector
August 15, 2023 - Scribbrโ€™s AI Detector can confidently detect most English texts generated by popular tools like ChatGPT, Gemini, and Copilot. Our free AI Detector can detect texts written using GPT2, GPT3, and GPT3.5 with average accuracy, while our Premium AI Detector has high accuracy and the ability to detect GPT4.
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?
Speaking from experience, digital magic wand's detector works surprisingly well (released a couple of days ago) More on reddit.com
๐ŸŒ r/Professors
230
72
March 30, 2025
[ Removed by moderator ]
US Constitution was written by AI as per AI Detector Tools. They're useless and waste of time More on reddit.com
๐ŸŒ r/Blogging
41
4
August 15, 2023
AI Detector
Honestly, your approach sounds solid! DMW AI is another detector worth testing might surprise you with its accuracy. Excited for your results! More on reddit.com
๐ŸŒ r/DataRecoveryHelp
97
235
June 16, 2025
Anyone have a recommendation for a good AI detector?
Require direct quotes from sources in the paper. When you suspect an AI-generated paper, go to the citations and see if the quotes exist. Itโ€™s not foolproof, but itโ€™s pretty good. More on reddit.com
๐ŸŒ r/Professors
143
11
November 5, 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 doesnโ€™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 โ€บ home โ€บ ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
What models can the AI Detector detect?

Copyleaks can detect content from:

  • GPT-5, GPT-4, ChatGPT
  • Claude
  • Gemini
  • DeepSeek
  • Llama (Meta)
  • Bloom
  • Rytr
  • Jasper

โ€ฆand more.

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copyleaks.com
copyleaks.com โ€บ home โ€บ ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
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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.
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QuillBot
quillbot.com โ€บ ai-content-detector
AI Detector - Advanced AI Checker for ChatGPT, GPT-5 & Gemini
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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YouScan
youscan.io โ€บ ai detector
Free & Accurate AI Detector | YouScan
Our free AI detector verifies text authenticity, and the LinkedIn Post Analyzer helps improve the reach of your LinkedIn posts.
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Grammarly
grammarly.com โ€บ ai-detector
AI Detector: Free AI Checker for ChatGPT, GPT5 & Gemini
1 week ago - 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.
Find elsewhere
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Copyleaks
copyleaks.com โ€บ home โ€บ ai detector
AI Detector - Free AI Checker for ChatGPT, GPT-5, Gemini & More
Itโ€™s the highest free scan allowance you can get. Copyleaks uses a combination of linguistic modeling, deep learning, and our proprietary AI Logic to detect generative content with unmatched precision. ... Go beyond a simple ChatGPT detectorโ€”get detection for all AI models, including Gemini, Claude, DeepSeek, and any new models as they are released.
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MyDetector
mydetector.ai
Free AI Detector - Accurate AI checker for chatGPT & More
With the MyDetector AI detector with upload file features, you can quickly analyze documents, presentations, and PDFs for AI content. This seamless process eliminates the need for tedious manual checks, making AI checker faster and more efficient ...
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Paperpal
paperpal.com โ€บ tools โ€บ ai-detector
AI Detector: Free AI Checker for ChatGPT, GPT-5 & Gemini | Paperpal
Paperpal AI Detector is a free AI checker to detect AI-generated text from ChatGPT, GPT-5, Claude, Gemini, and other AI tools with high accuracy.
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Pangram Labs
pangram.com
AI Detector โ€” Verified AI Content Checker | Pangram
Next ยท Pangram detects them ยท 02 ยท 02 ยท Pangram detects them ยท Pangram's AI detector uses natural language processing and a massive data set of human and AI writing to analyze patterns in AI generated text created by popular models like ...
Published ย  March 27, 2025
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Humanize AI
humanizeai.pro โ€บ detector
Free AI Detector - Advanced AI Checker for ChatGPT, Gemini & More
Best free AI detector & checker for AI content. Check ChatGPT, Gemini, GPT-4, GPT-5 & other AI-generated content and instantly get an overall AI score.
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Illinois
prowriting.web.illinois.edu โ€บ ai-detection
AI Detection | Program in Professional Writing | Illinois
Scribbr: A free AI detector that highlights the percentage of text written by humans and AI.
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NoteGPT
notegpt.io โ€บ ai-detector
AI Detector & Checker - Trusted, Free for ChatGPT, Claude, Gemini
In seconds, the AI Detector will reveal whether your content is AI-generated, providing precise results and a percentage of AI presence. Try our free online AI Detector to check text, images, and content for AI generation. No login required, ...
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EduBirdie
edubirdie.com โ€บ ai-content-detector
AI Detector Free - EduBirdie.com
Use Our AI Text Detector Free To Identify Content Generated โœ๏ธ By ChatGPT ๐Ÿ–‹๏ธ Gemini ๐Ÿ–‹๏ธ Copilot. Edubirdie's Free AI Detection Tool Available For Everyone
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editGPT
editgpt.app โ€บ ai-detector
Free AI Content Detector - Check if Text is AI-Generated
Free AI Content Detector - Check if Text is AI-Generated | editGPT | editGPT
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FinalScanPro
finalscanpro.com โ€บ home โ€บ free ai content detector โ€” ai or human? check instantly
Free AI Content Detector โ€” AI or Human? Check Instantly
December 8, 2025 - Free AI content detector to scan your writing for machine-generated text, preserve authenticity, and ensure trust.
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Originality AI
originality.ai
AI Detector - Most Accurate AI Content Checker for ChatGPT - Originality.ai
Originality.ai's Free AI Detector - Use our free AI checker to identify if text was generated from a popular AI platform like ChatGPT, Gemini, Claude, Grok and others.
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Reddit
reddit.com โ€บ r/professors โ€บ 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?
r/Professors on Reddit: 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?
March 30, 2025 - I can put in text either written by myself completely or an AI-generated prose, and each detector varied from 0-100% wildly. The ones with the higher percent were free... technically... but they were attempting to sell a service or app at the end of the detection, if that tells you anything.
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Wow1
wow1.com โ€บ home โ€บ ai detector - check if text is ai-generated free | wow1
AI Detector - Check if Text is AI-Generated Free | Wow1
Free AI detector checks if text was written by ChatGPT or AI. Get probability score, see highlighted AI sentences. No signup required.