Data breach exposure self-check
Data breaches are inevitable; how far one spreads is up to you. This is a self-assessment of your habits, not a lookup — it does not check whether your email is in a breach (that would mean sending your address to a third party, which we won't do). Instead it weighs the factors that decide the blast radius of a leak and shows what would contain it. Everything stays in your browser.
1. Do you reuse the same password across more than one site?
2. Do you use a password manager to keep your passwords unique?
3. Have you enabled two-factor authentication on your important accounts?
4. Do you use the same primary email for throwaway sign-ups and important accounts?
5. When a service you use announces a breach, do you change that password promptly?
6. Do you have important passwords that haven't changed in several years?
7. Do you use a breach-notification service to learn when your email appears in a leak?
Why this is a self-check, not a lookup
A tool that tells you "your email was in these breaches" has to send your email address to a third-party database to find out. For a privacy tool, that's the wrong trade — so this one doesn't ask for your email or check any list. It assesses the habits that decide how badly a breach would hurt you, entirely in your browser.
If you do want to check specific breaches, use a reputable breach-notification service directly — just know that doing so means handing over the address you're asking about.
Blast radius is the thing to manage
You can't stop services you use from being breached. What you control is how far one breach reaches. Unique passwords and a password manager stop a leak from one site unlocking another; two-factor authentication means a leaked password isn't enough on its own; and separate identities for low-trust sign-ups keep your important accounts out of the blast radius entirely.
Data breach exposure check — common questions
- Does this check whether my email was in a breach?
- No — and that's deliberate. A real breach lookup means sending your email address to a third-party service, which is exactly the kind of data-sharing we avoid. This tool assesses your habits instead, so it works without collecting anything about you. To check specific breaches, use a reputable breach-notification service directly.
- What decides how much a breach hurts me?
- Mostly reuse. If one leaked password unlocks only the site it came from, the damage is contained. If you reuse it across email, banking and social accounts, a single breach cascades. Unique passwords, a password manager, and two-factor authentication are what break that chain.
- Why does password reuse matter so much?
- Attackers take the username and password pairs from one breach and try them automatically against hundreds of other sites — a technique called credential stuffing. It only works because people reuse passwords. Make each one unique and a breach of one service can't open another.
- Is two-factor authentication really necessary?
- It's the strongest single thing you can add. Even if a password leaks, an account with app-based or hardware two-factor authentication needs a second factor the attacker doesn't have. SMS codes are better than nothing, but an authenticator app or hardware key is far harder to defeat.
- Does this store or send my answers?
- No. The scoring runs entirely in your browser. Nothing you select is sent to a server, logged, or tied to any account — you can share the score, but only if you choose to.
Related free tools
What NordSecure does about it
A free test tells you what's leaking. Fixing it usually means changing the device or the connection, not just the browser tab — which is exactly what NordSecure sells, without a name or an account.