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Is it safe to share personal information with ChatGPT?

Updated , 7-minute read

Short answer: it's safest not to. What you type into ChatGPT is stored in your account, may be used to train future models unless you turn that off, and can be read by people in some cases. That doesn't mean you can't use AI for personal or work tasks. It means the real names, numbers and details shouldn't be in the prompt. The AI almost never needs them to help you.

What happens to what you type

When you press Send, your message leaves your browser and goes to the AI company's servers. From there, a few things can happen to it:

  • It's stored with your account. Your chats are saved so you can come back to them. Deleting a chat in ChatGPT schedules it for deletion within 30 days, unless OpenAI has to keep it longer for security or legal reasons.
  • It may be used for training. On consumer plans, OpenAI says it may use your content to train its models unless you turn off "Improve the model for everyone" in your settings. Claude and Gemini have similar settings (here's how to change all three).
  • People may read it. Google says a subset of Gemini conversations is reviewed by human reviewers, and that reviewed conversations can be kept for up to three years even if you delete your activity. Google's own advice is not to enter information you wouldn't want a reviewer to see.
  • "Private" modes still keep a copy. ChatGPT's Temporary Chat doesn't appear in your history, but OpenAI may keep a copy for up to 30 days for safety purposes. With Gemini's activity setting turned off, conversations are still kept for 72 hours.

None of this is unusual or hidden. It's in each company's help pages. But most people never read them, and it's easy to forget once you're in the middle of a task.

What counts as personal information

Anything that identifies a real person, directly or in combination:

  • Full names, especially with an employer, city or job title
  • Email addresses, phone numbers and home addresses
  • ID numbers: passport, driver's license, social security, national ID
  • Credit card numbers, bank accounts, IBANs
  • Health information, case details, salaries
  • Other people's details: clients, patients, colleagues, family members

The last one is the one people underestimate. Pasting an email thread "to get a summary" usually means sharing several other people's names, addresses and signatures, without their knowledge.

The real risks, without the hype

Your data becomes training data. If training is on, your conversations can be used to improve future models. AI companies filter training data, but you have no control over what happens to it after you send it.

People can see it. Human review exists to improve quality and safety. Reviewed conversations are separated from your account, but the content itself can still contain the names and numbers you typed.

Your account is a target. Every saved chat is a record of what you've shared. If someone gets into your account, or a device you're signed in on, your chat history goes with it.

Work data isn't yours to share. In 2023, Samsung banned generative AI tools on company devices after employees reportedly uploaded internal source code to ChatGPT. A 2025 report by LayerX found that employees who paste into AI tools paste sensitive company data almost four times a day on average, and that most AI use at work happens on personal accounts, outside company controls. For lawyers, HR, finance and healthcare this can also mean breaking professional rules (more on that here).

How to get the help without the risk

  1. Turn off training in each AI tool you use. It takes two minutes and is worth doing anyway (step-by-step guide).
  2. Use placeholders instead of real details. "Write a follow-up email to [CLIENT] about invoice [NUMBER]" gets you exactly the same email. You fill the real details in yourself afterwards (how to anonymize a prompt).
  3. Keep a short "never paste" list in your head: IDs, card numbers, passwords, health details, other people's contact details (full checklist).
  4. Check before you send. Most leaks aren't decisions, they're habits: pasting a whole document without reading every line.

Settings only control what the company does with your data after it arrives. Placeholders mean the real data never arrives at all, which is why they're the stronger protection.

Where SafePrompt fits

Replacing details by hand works, but it's slow and easy to forget. SafePrompt is a free Chrome extension that does it automatically on ChatGPT, Claude, Gemini, Grok, Copilot and DeepSeek. When you press Send, it spots names, emails, phone numbers, IDs and card numbers and offers to swap them for placeholders like [[SP_EMAIL_1]]. When the answer comes back, it puts the real values back on your screen. Everything happens in your browser: SafePrompt never sees your prompts.

Key takeaways

  • What you type into AI chatbots is stored, may be used for training, and can sometimes be read by people.
  • Turning off training helps, but your data is still sent and stored.
  • The AI almost never needs real names or numbers to help you. Use placeholders.
  • Be most careful with other people's data: clients, patients, colleagues.

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