Security / Data breach check

Check if your data has been leaked

Check for free if your email address is included in a known data breach, and what you should do if so.

Data Breach Check

Are you a victim of a data breach?

Have you been the victim of a data breach? After the major hack at Odido in February 2026 and earlier incidents at companies like LinkedIn, Adobe, and Booking.com, many people are wondering if their data has been exposed. With the free check from Have I Been Pwned, you can find out within seconds.

What is a data breach?

A data breach occurs when criminals break into a company and steal customer data. This can include email addresses, passwords, phone numbers, or even bank details. This stolen data is often sold on the dark web and used for:

Identity fraud – Criminals impersonate you
Phishing attacks – Targeted fake messages to steal more data
Account takeovers – Logging into your accounts with leaked passwords
Credential stuffing – Automatically check if your password works elsewhere

How does the data breach check work?

Have I Been Pwned is the largest collection of known data breaches in the world. When you enter your email address:

We securely check if your address appears in known leaks
You see immediately in which data breaches you have been found
You will be shown which data has been leaked (passwords, addresses, etc.)

We do not store anything: the check runs directly via Have I Been Pwned.

What to do if you have been hacked?

Are you involved in a data breach? Don't panic, but do take immediate action:

1. Change your passwords. Start with the service where the leak occurred. Then, use a unique, strong password for every website.

2. Activate two-factor authentication (2FA). Even with a leaked password, criminals will then not be able to log in.

3. Use a password manager. Tools like Bitwarden, 1Password, or LastPass generate and remember strong passwords for you.

4. Watch out for phishing. After a data breach, you often receive targeted phishing emails. Are you unsure about a message? Forward it to us, and we will take a look.

5. Monitor your accounts. Keep an eye on your bank account and important accounts for suspicious activity.

Recognizing phishing

Phishing emails are becoming increasingly sophisticated. Watch out for these warning signs:

Urgency – “Immediate action required!” or “Account is being blocked”
Vague salutation – “Dear customer” instead of your name
Suspicious sender – ing-bank@gmail.com instead of @ing.nl
Rare links – Hover over links to see the real URL
Language errors – Although this is becoming less common

Are you unsure about an email? Contact us, we are happy to take a look.

Frequently Asked Questions

Is this check really free? Yes. Have I Been Pwned is free to use.

Will my email address be stored? We do not store anything, because you enter your email address on the Have I Been Pwned site itself. Read their privacy policy for details.

What if I can't be found? Good news! Your email address does not appear in known data breaches. Do stay alert, though.

Can I have a suspicious email checked? Yes. Send the email as an attachment to support@cloudformatie.nl, and we will take a look. Do not click on links yourself or open attachments. If in doubt, contact the sender via the official channels.

Can I use this for my company? Contact us for business solutions and security awareness training.

Need help with your digital security?

Cloudformatie helps individuals and businesses with:

Password management implementation
Set up two-factor authentication
Security awareness training
Microsoft 365 security
Network security

Contact us →