10 Best AI Humanizer Tools to Make Text Sound Natural

AI-generated content is trending in the market. But it’s also become a headache for people who crave that human touch. No matter where you’re scrolling on the internet, you’re bombarded with content that looks and feels robotic.

AI humanizers are becoming necessary now more than ever. Businesses recognize that they can’t scale permanently with AI-generated text, so they are constantly searching for ways to humanize AI text.

I’ve been in the writing domain for years, and that’s where I’ve understood it’s not just about the information you provide. In reality, it’s about making your content sound like a real person wrote it because no one wants to read anything written by bots.

Be it for SEO, marketing, or academic purposes, it’s becoming way too important for texts to bypass AI detection these days. AI humanizer tools are here to do the job for you and make every piece of robotic content sound natural and more relatable.

I’ll help you explore some of the best AI humanizer tools (including FREE ones) so that you don’t have to worry about AI detection anymore.

Top AI Humanizer Tools Comparison

Tools	Free allowance	Starting price	Registration needed?	Additional features
Humanize AI	200 words	$12/month	NO	An “Ultra run” feature to make content undetectable for all AI Detectors
Ahrefs AI	Unlimited	Free	NO	Option to select the number of variants for the same output
WriteHuman	200 words/request	$12/month	NO	Ideal for storytelling content types
AIHumanize.io	300 words	$14.9/month	NO	Simple text paraphrasing to bypass all the top-notch AI detectors
HumanizeAI.io	300 words	$20/month	NO	Ability to change readability levels based on the type of output you need
StealthWriter	300 words/request	$20/month	YES	Option to change every sentence from different variants in the output
AskYourPDF	1000 words/request	Free	NO	Option to make an text turn into university readability level for academics
Writesonic	200 words/request	Free	NO	Different tones to choose from and get the desired output
SurferSEO AI	500 words/request	$29/month	NO	You can easily humanize long student essays as well with SurferSEO
Undetectable AI	30,000 characters/request	$14.99/month	YES	Select the purpose to make your output more human-like in the right direction

1. Humanize AI: Best for AI Detection-Proof & SEO-Friendly Content

Humanize AI is a free AI humanizer tool that makes all your AI-generated text more relatable and humane. You can convert outputs from ChatGPT, Bard, Jasper, and most other AI tools (based on my trials). Plus, the humanized output you get is 100% undetectable, even for some pro tools like Turnitin, GPTZero, and more.

I took the tool for a spin, and here’s what the test results look like:

Based on the test, here’s what I found:

• Rewording level: Almost 70-80% of the words are paraphrased
• Complexity: Language got pretty simplified for anyone to understand (even with more descriptions)
• Tonality change: I tried different commands and still found the text to be more conversational & humane.
• Factual data: The facts & important information are preserved.

Humanize AI is an excellent tool for humanizing AI text with a clean output.

What I don’t like about Humanize AI?

The biggest downside I experienced with a few trial runs is that it made some small paragraphs very complex and wordy. Plus, it even tones down the language, making your impactful claims sound like normal statements.

Pricing

• Free (200 words/day)
• $12/ month (unlimited words/day)

2. Ahrefs AI: Ideal for AI-to-Human Text Conversion for SEO

Ahrefs also joined the race to make AI writing tools for SEO. I tested it for blog content, social media posts, and even emails, and I found it to work accurately for all of them.

Here’s what the test looked like:

And the results amazed me up to some extent:

• Rewording level: A good amount of rewording is seen, with changes visible in at least 30% of every sentence.
• Complexicomplex difficult words are made easy to understand to tone down the complexity.
• Tonality change: A slight shift is visible to make the phrases sound smooth & flow through the sentences.
• Factual data: Minor word changes exist, but they don’t tamper with the facts.

Ahrefs AI doesn’t just smoothen the phrases, but it also maintains clarity through text paraphrasing.

What do I like the most about Ahrefs AI?

The ability to generate 1, 3, or 5 variants for the same text with a single click is my favorite feature here. It makes it easy to compare and determine which output I like the most.

What I don’t like about Ahrefs AI?

I tried different AI humanizers, but I found Ahrefs to keep the text very simple and never try out any creative angles with the text. So, I found it to be boring after using it for more content pieces.

3. WriteHuman: AI Detection Removal

Are you trying to write stories that connect on deeper levels using AI? Well, you need WriteHuman by your side to make it sound natural, resonating, and humane at the same time. WriteHuman allows you to add that emotional touch to every content piece.

Here’s the test I conducted:

And the results were pretty convincing:

• Rewording level: I can say that almost 90% of the text is paraphrased with more word additions.
• Complexity: Even small words that could be complex for someone are replaced with simpler terms.
• Tonality change: AI-generated content is turned into more like a storytelling one.
• Factual data: No tampering is visible with all the facts & information.

If you know your audience really well, then you can use WriteHuman in the best ways and get outputs that hit the emotional mark.

What do I like the most about the tool?

I like the customization option, which allow me to set the tone of content.

What I don’t like about the tool?

I tried it with technical content, and it gave me a very wordy output, lacked proper use of technical terms, and was even wrong to some extent.

Pricing

• Free (200 words/request)
• $9/month (600 words/request)

4. AIHumanize.io: Bypassing AI Detectors Like Turnitin & GPTZero

Looking to bypass AI detection from all the top detectors like Turnitin, Originality, GPTZero, and more? AIHumanize.io can help you do this with proper authenticity and preserve your message simultaneously.

I conducted the below test:

And here’s what the results concluded:

• Rewording level: Less rewording was seen, but I saw many sentences shortened to great extents.
• Complexity: Not only words, but even the sentences in the output weren’t complex.
• Tonality change: The tone felt abrupt, and the output was more in the past tense with no clear emphasis.
• Factual data: The factual data is not lost at any point.

AIHumanize.io is highly trained on a large corpus of writing data that is visible in its outputs.

What do I like the most about the tool?

The way it can bypass all the top AI detectors with simple text paraphrasing is pretty good. I found the accuracy remarkable for the text outputs and how it can help with AI content writing.

What I don’t like about the tool?

I will not prefer this tool for every AI-generated write-up because it just makes it all in the past tense and even shortens every sentence (which sometimes loses that impact).

Pricing

• Free (300 words)
• $5/month (15,000 words/month)

5. HumanizeAI.io: 100% Undetectable AI-Generated Content

With a success rate of 99.54%, HumanizeAI.io is one of the best AI humanizer tools in the market. Whether your text is generated through ChatGPT, Claude, DeepSeek, Gemini, Jasper, or any other AI tools, you can convert that AI text to human text with HumanizeAI.io.

So, I took it for a spin and see what output I got:

The results were pretty convincing:

• Rewording level: Plenty of rewording, with ~90% change in the original words given in the input.
• Complexity: Some words were made easy to grasp, while I still saw some sentences that were made more complex.
• Tonality change: The tone is pretty simplified in the output and has a flowing nature.
• Factual data: No changes in the factual data or figures.

If you’re looking for clear explanations and more details about anything, you should try this tool!

Pricing

• Free (300 words)
• $4/month (50,000 words/month)

6. StealthWriter: Instant AI-to-Human Text Conversion

Get 100% human content with StealthWriter (that is what they claim, and I kind of agree with them). Plus, you don’t have to worry about SEO because it also takes care of that. The content you get from StealthWriter is plagiarism-free, free of errors, with no odd or senseless paraphrasing, and completely undetectable for top AI detectors.

Here’s what the test ride got me:

The results and the interface fascinated me:

• Rewording level: I saw approximately 50-60% of rewording that made complete sense at every place.
• Complexity: The output is smooth and easy because it feels like an “explain to a 5-year-old” prompt.
• Tonality change: The tonality is made to flow through the entire text.
• Factual data: I saw some small errors where the tool added figures that weren’t even in the input.

Whether your final output is completely humane, you can know it all with StealthWriter!

What do I like the most about the tool?

The option to select the model I want for the output and how I can replace every AI sentence from the output are game-changing features.

What I don’t like about the tool?

Unnecessary additions of factual data are a big turn-off for me about this tool.

Pricing

• Free (300 words/request)
• $20/month (400 words/request + additional features)

7. AskYourPDF: Best for Converting AI-Written Texts into University-Level Text

AskYourPDF uses intelligent AI technology to convert all your AI-generated content into readable and relatable content. The best part is the option to make it pass the university readability levels.

Here’s what the test looked like:

And the results:

• Rewording level: Swapping between key phrases is visible, along with moderate rewording.
• Complexity: It uses simpler, shorter, and easily understandable sentences.
• Tonality change: The output’s tone is casual, with no formal word usage.
• Factual data: No damage is done to the key figures or information.

Because of accurate humanizing, you can rely on AskYourPDF to work as your natural AI content generator.

What I don’t like about the tool?

You will instantly feel like the output is not polished enough in some places, making it lack fluency.

8. Writesonic: Best for E-Learning & Training Module Humanization

Writesonic’s free AI humanizer tool helps you transform the robotic AI-generated text into human-like content with a single click. Whether the input is from ChatGPT, Claude, Gemini, or any other AI tool, you will get accurate output through text paraphrasing.

Here’s what my test looked like:

And the results were good, up to some extent:

• Rewording level: Very few words are reworded from the input, majorly replacing only the difficult ones.
• Complexity: The text is simplified enough with easy-to-understand synonyms, even for the technical terms.
• Tonality change: The tone of the content doesn’t look very confident and impactful.
• Factual data: No changes were seen to the factual data.

What do I like the most about the tool?

Choosing from several tonalities makes it pretty easy to get different outputs for the same AI-generated text input, and that’s the best part about this tool.

What I don’t like about the tool?

The output is mostly similar to the input because it does not change many words, which didn’t quite fit the readability score I was looking for. But, hey, it is free so can’t complain much.

9. SurferSEO AI: Use for SEO Article

Take content from any AI software like Jasper, Claude, Gemini, ChatGPT, or others, and you can get back content that sounds like a real human with SurferSEO AI. Whether you want to humanize simple blogs or student essays, you can do it here with a single click.

Here’s the test I conducted:

And here’s what the results have to say:

• Rewording level: Found only a few words were changed, and I found it pretty ineffective.
• Complexity: The level of complexity hasn’t changed much when I compared the input with the output.
• Tonality change: There’s no visible change in the tone. It remained the same.
• Factual data: No factual data errors or changes.

What I don’t like about the tool?

SurferSEO AI Content Humanizer is still not up to the mark. I tried different inputs, but I still got outputs that had minor changes, no complexity removal, and even missing out on the tonality part in many ways.

10. Undetectable AI: Bypass ChatGPT, Gemini, Jasper, Llama

No need to worry about AI detectors anymore because you can use Undetectable AI to bypass every tool, from Turnitin to Copyscape and GPTZero. It even helps turn your AI-generated content into keyword-rich text that’s more relatable and humane.

I took it for a ride, and here’s what it got me:

And the results were something like this:

• Rewording level: Almost 80-90% of the original text is reworded to provide a fresh output.
• Complexity: Short forms like NLP are written along with their full meaning (Natural Language Processing) to decrease the complexity level of the entire text.
• Tonality change: The text is toned down, and I saw a reduced authority.
• Factual data: The data and figures remain as they are.

What do I like about the tool?

The way it shows whether the generated output will look like a human or not on some of the major AI detection tools is the best part of Undetectable AI.

What I don’t like about the tool?

I noticed it turned the entire paragraph into a single sentence by adding more conjunctions and punctuation. This reduces readability levels, making it very much wordy as well.

Pricing

• Free (30,000 characters/request)
• $14.99/month (15,000 words/month)

Conclusion

AI content is rising everywhere, and the time is near when people will get bored with it and crave that human touch. This is where some of these free AI humanizer tools can help you out with content moderation and convert AI text to human text.

Which one is your favorite tool among the ones mentioned above?