Frequently asked questions
Straight answers about the tools, plans, your data and AI detection. Still stuck? Contact us.
Using the tool
What does HumanizerGPT do?
It rewrites text, usually drafts from ChatGPT, Claude, Gemini or other AI writers, so it reads like a person wrote it. It keeps your meaning, facts and keywords while changing sentence rhythm, structure and word choice.
Which modes are available?
The humanizer has Standard, Academic, SEO Blog and Casual modes. The paraphrasing tool has Standard, Fluent, Formal, Simple and Creative, and the AI rewriter has Standard, Formal, Casual, Persuasive and Concise. You can also set the rewrite level to Light, Balanced or Max.
Can I keep certain words unchanged?
Yes. Add brand names, technical terms or keywords to the Keep field. They come back in the output exactly as you typed them.
Which languages are supported?
The tools work in more than 50 languages. The output is always in the language of your input.
Can I upload a file?
Yes. Upload a .docx, .pdf, .txt or .md file up to 10 MB, or drop it on the input box. The text is read in your browser and placed in the input box, so you can check it before you process it. Scanned PDFs without selectable text cannot be read.
Plans and billing
Is HumanizerGPT free?
Yes. You can process up to 500 words a day without an account, and a free account adds 1,000 bonus words. The daily allowance is shared across the humanizer, paraphrasing tool, AI rewriter and grammar checker.
How much do the paid plans cost?
Basic is $9.99 a month, or $4.99 a month billed yearly, for 5,000 words a month. Pro is $19.99 or $9.99 yearly for 15,000 words and the advanced model. Ultra is $39.99 or $19.99 yearly for 30,000 words. Unlimited is $79.99 or $39.99 yearly, with fair use.
Can I cancel at any time?
Yes, from your account page. Cancelling stops the next renewal, and you keep access until the end of the period you already paid for.
Do you offer refunds?
You can request a refund within 14 days of purchase if you have used fewer than 500 words on the paid plan. The refund policy page has the details.
Is there an API?
An API for teams and agencies is coming soon, planned from $99 a month for 200,000 words. You can join the waitlist on the API page.
Privacy and data
Is my text stored?
No, whether or not you are signed in. Your text is sent to our AI model provider to produce the result and is not kept by us. We store only usage metrics such as word counts, never the text itself. Uploaded files are read in your browser and never reach our servers.
Do you use my text to train AI models?
No. We never use your text to train models.
What do you store to enforce the free limit?
A salted hash of your IP address that changes every day, together with the number of words used that day. Raw IP addresses are not stored, and these records are deleted after about a week.
How do I delete my account?
Open your account page and use Delete account at the bottom. It removes your account, balance and sign-in history right away. You can also email us at the address on the contact page; the privacy policy explains your rights.
AI detection
Does HumanizerGPT bypass Turnitin or other AI detectors?
No tool can guarantee that. Detectors change often and score text differently. Instead of promises, we are preparing a public benchmark that shows how our output scores across widely used detectors.
Do you have an AI detector?
No. We focus on rewriting, and we publish benchmark results from widely used third-party detectors instead of building our own.
Are the benchmark numbers on the site real?
Not yet. The numbers currently shown are sample data that illustrate the format. They will be replaced with real results from our first published benchmark run.
Can I use HumanizerGPT for school work?
Follow your school's rules on AI tools. Many institutions restrict them, and our responsible use policy does not allow using the tools to break those rules.