AI bypassing detection is innovation and yet it is also a problem. Teachers find it a nuisance when their AI detection tool gives false negatives. Students struggle with having false positives on turnitin. Creative individuals struggle with their masterpieces being valued less because “with AI, anyone can do what they can do”.
That is why people look towards AI-detection tools like GPTZero and JustDone AI. However, many users are skeptical about their performance, GPTZero vs JustDoneAI, and whether there are even better options out there. Let's get into it.
What are GPTZero and JustDone AI？
I’ve had quite a few requests to cover GPTZero and JustDone AI. Both of them are great contenders as AI detection tools. They have their strengths and weaknesses. Let’s go over each one.
GPTZero
GPTZero is a popular choice as an AI content detection tool. It is designed to identify whether any content has the markers of being generated using an artificial intelligence model like ChatGPT, Gemini, or GPT-4.
It can also tell whether or not the text is human-written, but how well does it do that? Let’s go over some of the key features, pros, and cons.
Going over the GPTZero reviews and testing it out for myself as well, I can say that it has pretty high accuracy. Their claim is about 98.8% accurate results, but the consensus is 70-85% accuracy.
GPTZero is also multilingual, it can detect text in various languages and determine the use of AI in that text, making this tool globally accessible.
It performs real-time analysis, which is also a plus for me. I prefer immediate results, and I’m sure you would too. The best part is that it is free and has unlimited uses.
Pros
High-detection accuracy for large language models.
User-friendly dashboard.
Free to use.
Provides perplexity and burstiness metrics.
Cons
May falsely flag nuanced or technical human writing as AI.
Limited integration and export options.
How to Use
GPTZero is available as a website and a Chrome extension. As of 2025 there is no mobile app but hopefully that will be rectified in the near future. For now, here is how to use GPTZero on your devices.
If You’re on a Computer
If you have a PC, be that a laptop or desktop, this is how you use GPTZero for AI-detection.
Step 1: Head over to the GPTZero website on your web browser of choice.
Step 2: You will be prompted to log in or sign up. You can use your Google account or email. There’s a free plan if you just want to try it out without an account.
Step 3: You will then be taken to a page with a text box. You can either paste your text in that box or upload a Word doc or a PDF file.
Step 4: Click “Scan”. GPTZero will then start your scan. This part took me a few seconds.
Step 5: You will be given the results. I also noticed the sentence-by-sentence breakdown along with a confidence score about the likelihood of that text being AI.
If You’re on Your Phone
Follow these steps to learn how you can use GPTZero on your phone.
Step 1: On your phone, you can open your browser, whether that’s Safari or Chrome.
Step 2: Type gptzero.me. It works the same way it does on the desktop.
Step 3: Same procedure as the PC. Paste or upload your text, OR upload your Word/PDF file.
Step 4: Tap on the “Scan” button. The results will load just as they did for your computer.
If You Want the Chrome Extension
This feature only works with Google Chrome for obvious reasons. Here is how you can add and use it as a Chrome extension.
Step 1: Open Chrome and type in “GPTZero extension”.
Step 2: Amongst the search results, you’ll find the Chrome Web Store link. Click it.
Step 3: Click, add to Chrome, as you would for any other extension.
Step 4: Now that you’ve gotten the extension, you can log in to your GPTZero account.
Step 5: Open a Google Document. You’ll notice a GPTZero button in the toolbar; click it.
Step 6: The extension will then scan your document and give you results based on the written material in the Google Doc.
Is it a great multilingual, reasonably accurate AI tool? Is it possible to have false flag detections on a few writing styles, as well as be limited in functionality? Also, yes. Each AI tool has its nuances.
JustDone AI
JustDone AI is probably the name you’ve all heard of at least once when looking for an AI checker. It is a very well-known tool amongst students, and perhaps that is owed to JustDone AI’s marketing. How does it fare in a side-by-side comparison to GPTZero? Let’s have a closer look.
It is a multifaceted tool, more famously used for content creation, but it also has AI detection as a feature. Students use it for rewriting and summarizing, while creators might use it for SEO optimization. Like GPTZero can detect text generated by ChatGPT, GPT-4, and more.
Pros
It is an All-in-one content tool to write, check, and optimize. All on one platform.
Clean interface.
Is multilingual as well.
Cons
It has a lower detection accuracy than GPTZero.
It can be overwhelming to use because it has a lot of tools packed together.
How to Use
You can access JustDone AI on your PC and your phone.
On Your Computer
Here is how you use the web version on your desktop or laptop.
Step 1: Head to the website JustdoneAI on your browser of choice.
Step 2: You can then sign up to create a free account. Log in if you already have one.
Step 3: Choose the AI detection tool, or any other tool of your choice if that’s not what you’re here for. For now, let’s use the AI-detector.
Step 4: Enter your text by either pasting it or uploading a document.
Step 5: Click “Check for AI Content” and wait for it to process your text.
Step 6: The tool will then highlight all sections of your text that it recognizes as AI.
On Your Phone
Follow these steps to access and use JustDone AI on your phone
Step 1: Similar to the PC version, visit the website justdone.com on your phone browser.
Step 2: You can then sign up to create a free account or log in.
Step 3: Choose the AI detection tool.
Step 4: Enter your text by either pasting it or uploading a document.
Step 5: Click “Check for AI Content” and wait for it to process your text.
Step 6: The tool will then highlight all sections of your text that are recognized as AI.
Comparison of GPTZero and JustDone AI
To summarize our analysis of both tools, here is a side-by-side comparison.
Aspect | GPTZero | JustDone AI |
|---|---|---|
Primary Function | AI-generated content detection | Content creation with AI detection features |
Detection Accuracy | High accuracy with detailed analysis | Moderate accuracy. More general-purpose |
User Interface | Intuitive and user-friendly | Designed for ease of use across various applications |
Integration | Primarily web-based | Primarily web-based. Limited 3rd party integration |
Customization | Offers adjustable detection thresholds and detailed reports | Limited options for customizing detection parameters |
Pricing | Free tier + Premium Plans | Free + Premium with more paid tools |
This should help you visualize the key differences when it comes to GPTZero vs JustDone AI. They have their own payment plans for their premiums and tools that you can go over on their official website and choose the one that meets your needs while remaining in your budget.
Top AI Detector Alternative – Toolsmart’s Free Undetectable AI Tool
GPTZero or JustDone AI? You don’t have to pick because Toolsmart combines the best of both tools. Not only is it a powerful, accurate, and easy-to-use AI detection software, but it is also a multipurpose one. Its specialty lies in its ability to detect and humanize AI content, helping it bypass detection tools. It serves as both a GPTZero Alternative and a JustDone AI Alternative.
Purpose-Built for Humanization
While people debate GPTZero AI Detector vs JustDone AI detector, Toolsmart came up with a free Undetectable AI designed specifically to rewrite AI-generated content in a way that evades AI detection tools. Unlike GPTZero, which only identifies AI-written text, or JustDone AI, which includes general rewriting features.
Toolsmart is fine-tuned for making content appear genuinely human, which means Toolsmart delivers higher success rates in passing AI detection, making it the go-to choice for authentic, original, and undetectable content.
Free and Accessible
While JustDone AI and GPTZero have premiums, Toolsmart is free and offers more features than both of them combined. It is suited to students, bloggers, and everyday users who don’t want to buy and cancel subscriptions over and over.
Tailored Writing Modes
It comes with not one, not two, not three, but eight writing modes to choose from. You can pick amongst Standard, Fluency, Formal, Academic, Simple, Creative, Expand, or Shorten.
Fast and User-Friendly
The rewrite takes about 10 to 30 seconds. The interface is probably the most dynamic of all the options I’ve explored thus far.
FAQs
1. What is the main difference between GPTZero vs JustDone AI?
GPTZero specializes in detecting AI-generated content with high accuracy, while Justdone AI offers detection alongside additional features like workflow optimization and reporting.
2. Can I bypass AI detectors with a humanizer tool?
Yes! Using smart rewording and organic changes applied by AI Humanizer, like Toolsmart, you can rewrite text to make it more difficult for AI detectors to detect.
3. What customization options are available for Toolsmart’s Undetectable AI Rewriter?
Toolsmart’s Undetectable AI Rewriter provides eight distinct modes, including Standard, Fluency, Formal, Academic, Simple, Creative, Expand, and Shorten. These modes allow users to tailor the text according to their specific needs.
