AI humanizer tools are important for many reasons.
ChatGPT was released a few years ago.
Since then, there has been an explosion in the number of tools that allow you to create all types of content. You can craft emails, blog posts, memos, and everything in between.
AI content can be comprehensive but it’s often bland and uninspired. That’s where AI humanizer tools come into play.
In this guide, you’ll learn the best AI humanizer tools of 2025, understand exactly what this type of tool is, and key features to look out for.
What is an AI humanized?
An AI humanizer is a software application designed to make AI writing more human-like. This is done for various reasons which include to bypass AI detection, making the writing more engaging, and preventing plagiarism.
The way AI humanizer tools are designed varies from one provider to the next. Some providers use prompt engineering to build on top of ChatGPT or Gemini. Others develop independent LLMs to write in a certain way. A few of the tools listed use a combination of existing LLMs and train them on specific data to get the desired result.
All AI detection remover tools claim to make your content more human-like so you can easily bypass AI detection and better engage your audience.
There’s something you need to be aware of. AI detectors are inherently flawed and the margin of error is relatively high. Some tools are wrong more than 50% of the time. The best ones are wrong between 20% – 30% of the time.
In this comparison of the best AI tools, we’ve used the tools to turn a random piece of AI-generated text into humanized text. We then used that AI detector ZeroGPT to figure out how much of it was considered AI-generated.
You can see the piece of AI-generated content here. It scored 97% AI-generated.
The goal of an AI humanizer is to reduce that to 25% or below.
Features to look out for in an AI humanizer tool
Before we rank the tools, there are a few features to look out for. They’re not too complex or amazing but essential. If the tool doesn’t have these then skip it immediately and look for something better.
- Maintains the meaning of your text.
It doesn’t matter if you pass AI detection if the core message you’re trying to deliver has been changed into something else. Whatever tool you decide to go with, make sure it focuses on preserving your meaning while changing the text.
- Doesn’t introduce grammar or spelling mistakes
A few AI Humanizer tools that are more focused on bypassing AI detection may cut corners and intentionally introduce errors.
Why?
Because when generative AI produces text it rarely misspells words. Grammar is a bit tougher but it makes few grammar mistakes either. This is much more common with human writing so the more mistakes there are the more likely it was written by a human.
This, of course, is problematic because when you fix the mistakes, the AI-written score will go back up. Choose a tool that focuses on making the text human-like without
- Fast turnaround
This should go without saying but it’ll be stated anyway. The entire process from beginning to end should be fast. You shouldn’t have to jump through a dozen hoops to arrive at humanized content. It should be one or two button clicks.
- Simple interface
This builds on the last point but it’s slightly different. The process of humanizing the content may be fast but the interface is a bit complex. You can do this, add that, remove something else, and so on. In the end, it starts to get complicated which helps no one.
It’s fine if there are some value-added features that you can access if you want but it’s not alright when you have to wade through all those things to get to the main interface.
Best AI humanizer tools
Humanize AI – best overall
Humanize AI is a newer AI humanizer launched in 2024. While new, it has quickly become a favorite of users and customers. The team built new technology to enhance its ability to humanize AI text and even trained high-quality models on over a million words of text.
It focuses on a core set of features and makes sure your text remains clear and the meaning is unchanged. It’s also fast. When using it, we only needed a few seconds to transform a few hundred words into human-like text.
We tested it out to see how well it was able to change the original text to human text and the results were exceptional. According to ZeroGPT, the text produced by Humanize AI was 0% AI-generated. It also did a good job of maintaining the original meaning and making sure the text was clear.
Humanize AI has a free plan with paid plans starting at $19/m.
Undetectable
Undetectable AI was one of the first AI humanizer tools available and has since come a long way. Like other tools, it’ll help you transform your text in a way that bypasses AI detection. Initially, it had a few hiccups such as intentionally adding misspelled words and poor grammar. Some of those issues have been ironed out but in some of our tests, we still experienced it.
When it messes up, it’s bad.
The tool combines humanizing AI content and detecting AI content in one place which can make it more convenient for users.
When we used it to rewrite our AI content and then run it through ZeroGPT, it scored 0% which we can’t complain about. With that being said, the sample we used did have some grammar errors which were noticed after the fact.
Undetectable AI starts at $14.99/m and the plans scale depending on the number of words you need to humanize.
Writehuman
Writehuman is an AI humanizer tool that grew fast and has shown its worth in multiple scenarios. It helps you convert your AI text into human text and has a built-in AI detector which will show you a score after you’ve transformed the text.
We noticed that it had issues preserving some headings and occasionally made grammar mistakes. It’s unclear whether this was intentional or a limitation of the software. Nonetheless, it preserved the meaning of the writing and got the AI score down.
We ran it through an AI detector and it was considered 0% AI written. This was after we corrected the grammar mistakes. We can’t complain about those results.
Pricing starts at $12/m and increases depending on the number of requests and words you need to convert to human text.
StealthGPT
StealthGPT is another entry on this list that has been around for a while. It provides a limited free plan that you can access and take advantage of to see how it works.
When you first log in, the interface is a bit confusing. There are multiple modes and options to choose from. While we can appreciate that they want to make the tool more comprehensive, it distracts from the core feature.
Once we found what we were looking for, I converted the text using the tool then plugged it into ZeroGPT and it came back with a score of 12% which is a solid entry.
It does the job it was designed to do and, as long as you double-check the output, you should be fine using it.
Paid plans start at $24.99/m and it has a built-in pricing reduction feature the longer you stay a customer.
Twixify
Twixify was founded in the middle of last year and has made solid strides when it comes to humanizing AI text. It offers a limited free plan to test it out and makes regular updates.
It’s one of the few tools on this list that focuses on the basics and does them well. It doesn’t add many bells and whistles which is fine because it’s able to deliver on its core promise.
It has a free plan but it’s so limited that it’s almost as good as not having one. You’re only able to humanize 150 words per request and you’re given 3 requests for a total of 450 words.
It’s also one of the cheapest (if not the cheapest) options on the list.
When we humanized the sample text and ran it through the AI detector, it scored 26%. It needed to be humanized again before it went below 25%.
The initial pricing plan comes in at $8/m.
Conclusion
Many AI humanizer tools are available right now, and more are popping up daily. Some of them do what they say while others attempt to play tricks.
We’ve gone through the best tools available and even tested the output to see if they deliver on their promise. Most of them do on the first try but some take a few more tries to get it right.
Humanize AI is our top choice with the other four being great options in most cases. All the entries on this list will produce results for you but it’s important to note that AI detectors are flawed tools and will just as easily flag 100% human-written content as AI content.
