The Humanify.pro AI Humanizer uses Google Gemini to rewrite text. Because the request goes directly from your browser to Google, you need to add your own Gemini API key before the tool can work.

A Gemini API key is a private code that connects the tool to your Google AI Studio project. Google provides a free tier for certain models, but free limits and model availability can change.

Open Google AI Studio API Keys Open AI Humanizer

Step 1: Open Google AI Studio

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Go to the API Keys page

Open Google AI Studio API Keys and sign in with your Google account.

For many new users, Google AI Studio automatically creates a project and key. When no key is shown, use the Create API key button.

Step 2: Create and copy the key

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Click Create API key

Select an available project if Google asks, create the key, and click the copy icon. Copy the complete key without adding spaces.

Keep it private

Do not publish an API key in a blog post, screenshot, public code repository or social-media message. If a key is exposed, delete or revoke it in Google AI Studio and create a replacement.

Step 3: Add the key to the AI Humanizer

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Paste and save

Return to the AI Humanizer, paste the key into the field at the top, and click Save key & continue.

The tool saves the key in that browser until you remove it. You can then paste your text, choose the content type and tone, and click Humanize text.

Your key is ready? Add it once and start rewriting your text.

Open AI Humanizer

Use your Gemini API key safely

  • Use the AI Humanizer on a device and browser you trust.
  • Do not paste the key into unknown websites.
  • Remove the saved key when using a shared computer.
  • Check your usage and quota in Google AI Studio.
  • Create a new key when Google blocks or revokes an old one.

On Humanify.pro, the key is stored in your browser. When you submit text, your browser sends the key and text directly to Google Gemini. The tool does not need to upload the text to a Humanify.pro processing server.

Common problems

Google AI Studio shows no key

Click Create API key. Google may ask you to create or select a project first.

The AI Humanizer says the key was rejected

Copy the complete key again, make sure there are no spaces, and save it. When the key remains invalid, create a new one in AI Studio.

You reached a quota or rate limit

Wait and try again later, or open the Usage section in Google AI Studio. Free-tier quotas depend on the model and may change.

You are using a shared computer

Use the Remove key option on the AI Humanizer before leaving the device.

Frequently asked questions

Google provides a free tier for certain Gemini models with limited quotas. Availability and limits can change, and higher usage may require billing.
A new account can begin on the Gemini API free tier without upgrading to paid usage. Google may show optional billing controls for higher limits.
Open the AI Humanizer, paste the key into the Gemini API key field at the top of the page, and click Save key & continue.
The AI Humanizer stores the key in your browser until you remove it. When you generate a rewrite, the browser sends the key and text directly to Google's Gemini API.
Copy the complete key again without spaces. If Google still rejects it, create a new key in AI Studio and replace the saved key in the tool.

Official Google resources

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