AI tools are useful, but they're not your private diary. Whatever you type goes to a company's servers, and how it's handled varies. You don't need to be paranoid — just sensible. Here's how to use AI safely and avoid the mistakes beginners commonly make.

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The golden rule: don't paste secrets

Treat an AI chat like a postcard, not a sealed letter. Avoid pasting things like passwords, full bank or card numbers, government ID numbers, or other people's private details. If you wouldn't want it stored somewhere outside your control, don't put it in.

Understand what happens to your input

Many AI services may use conversations to improve their models, unless you opt out. Most major tools now offer settings to turn off training on your data or to delete your history. It's worth spending two minutes in the settings of whatever tool you use.

  • Look for a "Data controls" or "Privacy" setting.
  • Turn off "use my data for training" if you prefer.
  • Clear your chat history periodically.
Four habits cover most of the risk. None of them requires a paid plan.
HabitDo thisSkip this
SecretsTreat chat like a postcardPasswords, card numbers, other people's private details
SettingsOpen Data controls / PrivacyLeaving training-on-your-chats on if you dislike that
WorkUse the approved work toolPasting company files into a personal account
AccuracyVerify health, legal, money and factsTrusting a confident wrong answer

Be careful at work

Don't paste confidential company information into personal AI accounts. Many employers have rules about this for good reason. If your workplace offers an approved AI tool, use that for work tasks.

Watch out: sketchy "free" AI apps and browser extensions can harvest what you type. Stick to well-known tools from our leaderboard, and read how to spot AI scams.

Don't trust blindly

Safety isn't only about privacy — it's also about accuracy. AI can state wrong things confidently. For anything that matters (health, legal, financial, factual claims), verify with a reliable source. Our routine for this is in how to fact-check AI.

Protect kids and accounts

If younger family members use AI, set expectations together and check the tool's age guidance. And secure your AI accounts like any other: a strong, unique password and two-factor authentication where available.

The balanced takeaway

You can get enormous value from AI while staying safe. Don't paste secrets, check your privacy settings, stick to reputable tools, and verify important answers. Do those four things and you've handled 95% of the risk. For more common slip-ups, see 9 common AI mistakes beginners make.