Data Breach Check
Find out if your personal data has been exposed in known breaches.
We don't collect your email
We link you directly to trusted breach-checking services. Your email never passes through our servers.
What Breach Checkers Actually See — And Why It Matters
Breach-check tools like Have I Been Pwned hold structured exports of data that has already leaked publicly — typically email addresses, hashed or plain-text passwords, usernames, IP addresses, and (in some breaches) physical addresses, phone numbers, and government IDs. The HIBP corpus alone catalogs over 14 billion compromised records pulled from more than 800 documented breaches, including LinkedIn (2012, 167M records), Adobe (2013, 153M), MyFitnessPal (2018, 144M), Adult FriendFinder (2016, 412M), Collection #1 (2019, 773M unique addresses), and the COMB compilation (2021, 3.2B). Checking a single email returns a YES/NO + breach list within a second; the lookup is hashed via the k-Anonymity protocol so the service never sees your full email — only the first five characters of its SHA-1 hash.
The single highest-impact action after discovering a breach is rotating the password on the affected account AND every account where you reused it — credential-stuffing attacks now account for the majority of account takeovers tracked by industry incident-response reports. Enable a hardware security key or app-based two-factor authentication on email, banking, and password-manager logins as a one-time defense that survives future breaches. Subscribe to HIBP's notify-me feature to receive automatic alerts when your address surfaces in a new corpus — these typically arrive within 24-72 hours of a breach being publicly disclosed. PrivacyFix maintains a free directory of dedicated breach-monitoring tools and explains their data-handling practices in plain language so you can pick one that doesn't trade your privacy for the lookup.
Check Your Email Now
Have I Been Pwned is the gold standard for breach checking. It's free, trusted by security professionals, and covers billions of breached records.
Check on Have I Been PwnedOpens in a new tab. Enter your email on their site to check.
14B+
Breached records in HIBP
800+
Known breach incidents
$4.9M
Avg breach cost (IBM 2024)
194
Days avg to detect a breach
Why You Should Check for Data Breaches
Most people have been exposed in at least one data breach — often without knowing it. When a company gets hacked, your email, passwords, phone number, or even financial details can end up on the dark web within hours. Criminals use this data for identity theft, credential stuffing (trying your password on other sites), phishing, and account takeovers.
Checking regularly means you can change compromised passwords before they're exploited. The biggest risk isn't the breach itself — it's reusing the same password across multiple sites. One leaked password can unlock your email, bank, and social media accounts.
Other Breach Checking Services
Firefox Monitor
Mozilla's breach notification service. Uses HIBP data with Firefox integration.
By Mozilla
Google Password Checkup
Check if your saved Google passwords have been compromised.
By Google
Apple Password Monitoring
Built into iOS/macOS. Alerts you if saved passwords appear in breaches.
By Apple
What to Do If You're in a Breach
Change your password immediately
If the breached site shares a password with other accounts, change those too. Use unique passwords for every site.
Enable two-factor authentication
Add 2FA to any account that supports it. Use an authenticator app, not SMS if possible.
Monitor for suspicious activity
Watch for unexpected emails, login attempts, or account changes. Check your credit report if financial data was exposed.
Consider a credit freeze
If sensitive data (SSN, financial info) was exposed, freeze your credit at all three bureaus. It's free.
Use a password manager
A password manager generates and stores unique passwords for every site. Popular options: 1Password, Bitwarden, Dashlane.
Major Data Breaches
If you've ever used these services, your data may have been exposed:
| Company | Year | Records | Data Exposed |
|---|---|---|---|
| National Public Data | 2024 | 2.9B | SSN, addresses, names |
| Ticketmaster | 2024 | 560M | Names, emails, payment data |
| AT&T | 2024 | 73M | SSN, account data |
| MOVEit | 2023 | 77M | Mixed (multi-org) |
| 2021 | 700M | Scraped data | |
| 2021 | 533M | Phone numbers, emails | |
| Yahoo | 2013 | 3B | Full accounts |
| Equifax | 2017 | 147M | SSN, financial data |
This is just a sample. There have been thousands of breaches affecting billions of records.
Frequently Asked Questions
Is Have I Been Pwned safe to use?
Yes. HIBP was created by Troy Hunt, a respected security researcher. Your email is searched against a database of known breaches, but it's not stored or shared. The service is recommended by security experts worldwide.
What if my email isn't found?
Good news! Your email hasn't appeared in any known public breaches. However, not all breaches are reported or discovered. Practice good security hygiene regardless.
Should I be worried if I'm in a breach?
Don't panic—most people are in multiple breaches. The key is to take action: change affected passwords, enable 2FA, and monitor your accounts. Old breaches with passwords you no longer use are less concerning.
Why don't you check breaches directly on this site?
We're a privacy site—we don't want your email passing through our servers. Linking you directly to HIBP means we never see or store your email address. That's the privacy-first approach.
Next Steps
Checked for breaches? Take our Privacy Audit to get a complete action plan for protecting your data.
Take Privacy AuditData Sources
- Have I Been Pwned (Troy Hunt) — 14B+ breached records across 800+ known breach incidents. The gold standard for consumer breach checking, trusted by security professionals and governments worldwide.
- Firefox Monitor (Mozilla) — Breach notification service built on HIBP data, with Firefox browser integration.
- Google Password Checkup — Checks saved passwords against Google's breach database using k-anonymity model.
- Apple Password Monitoring — Built into iOS/macOS, alerts when saved passwords appear in known breach databases.