What happens when you paste sensitive data into AI?

AI is incredibly useful. But there is a privacy problem we don't talk about enough.

We paste customer information, API keys, emails, phone numbers, IP addresses and internal logs into AI tools every day.

Most of the time, the AI doesn't actually need that information.

So we built AI Prompt Anonymizer.

It automatically finds sensitive information in your prompt and replaces it before you send the prompt to ChatGPT, Claude or Gemini.

This is what the workflow looks like:

• Paste your prompt.

• Detect sensitive information.

• Choose how you want to mask it.

• Copy the anonymized version.

• Paste it into your AI assistant.

• Restore the original values later if needed.

The interesting part is that the anonymization happens directly in your browser.

Your original text isn't uploaded to our server.

No account. No extension. No complicated setup.

It can detect 18+ types of sensitive information, including emails, phone numbers, API keys, credit card numbers, IP addresses, IBANs, crypto wallet addresses, JWTs, URLs, MAC addresses, street addresses and names.

You can also add your own custom terms that should always be masked.

There are three masking options.

Token mode replaces sensitive information with labels such as [EMAIL_1].

Redaction mode completely hides the information.

Fake data mode replaces the original value with realistic fictional information.

The token mode is especially useful because you can restore the original values after getting your AI response.

For developers, this can be useful when sharing error logs, stack traces or API responses with AI coding assistants.

For support teams, it can help remove customer information from support tickets.

For businesses, it can help sanitize contracts, HR documents and internal information before using AI.

The goal isn't to stop using AI.

It's to stop sending AI information it doesn't actually need.

AI Prompt Anonymizer is part of ToolNova, a collection of free browser-based tools.

Try it here:

https://www.toolnova.org/ai-tools/ai-prompt-anonymizer

What do you think?

Should anonymizing sensitive information become a normal step before using AI?