Has Your Password Already Leaked?
Check any password against 17.8 billion accounts exposed in real breaches — without the password ever leaving your browser. No sign-up, no email required.
Nothing you type is sent anywhere. Your browser fingerprints the password locally and sends only the first five characters of that fingerprint. Here is exactly how that works ↓
What actually left your browser
- Sent to the API
- Possible answers returned
- Your full password
- never transmitted
- Stored by us
- nothing
Why You Can Trust This With a Real Password
Most “breach checkers” ask you to hand over the thing you are worried about. This one is built so that it cannot see it — a technique called k-anonymity.
The password becomes a fingerprint
Your browser runs the password through SHA-1, producing a 40-character fingerprint. This happens on your device. The password itself is never sent over the network.
Only five characters travel
We send the first five characters of that fingerprint to the Have I Been Pwned API. Five characters describe roughly 2,000 different passwords, so the request does not identify yours.
The match happens on your device
The API returns every fingerprint starting with those five characters — about 2,000 of them, plus padding entries so the response size reveals nothing. Your browser finds the match locally.
The short version
The service answering the question never learns which password you asked about, and iTech Plus never receives it either. There is no form submission on this page and no database behind it. Close the tab and nothing remains.
You do not have to take our word for it — open your browser’s developer tools, watch the Network tab, and run a check. You will see one request containing five characters.
It Came Back Breached. Now What?
A hit does not mean your account was hacked. It means this password appears in data dumps that attackers load into automated login tools. Treat it as burned.
Change it everywhere it was reused
The real damage from a breached password is reuse. Attackers take a leaked pair and try it against banks, email and Microsoft 365. Change it on every account that shared it, starting with your email — that mailbox resets everything else.
Turn on multi-factor authentication
MFA is what stops a leaked password from becoming a break-in. If you only enable it in one place, make it email. Almost every account recovery path in your life runs through that mailbox.
Stop inventing passwords
Length beats complexity, and uniqueness beats both. A password manager generates a different long password for every site so one leak stays contained. Substituting a 3 for an E has not fooled anyone in years.
What About My Email Address?
Different question, and this tool does not answer it — so here is where to go instead.
To check one address
Have I Been Pwned, the same service powering the tool above, will tell you which breaches a given email address appears in. Go straight to haveibeenpwned.com and search it there. It is free and it is the authoritative source — we would only be putting a form in front of it.
To check an entire company
That is a different job. Searching one address at a time tells you nothing about the mailbox belonging to the employee who left last year, or the shared billing account nobody owns. Domain-wide breach monitoring watches every address on your domain continuously and tells you when a new dump includes one of them — which is the only version of this that works, because the next breach has not happened yet.
That monitoring is part of what we run for the businesses we support, alongside enforcing MFA and catching the reused credentials this page is about. If you want to know what is already circulating for your domain, ask us and we will check.
This Is Not Slowing Down
The six largest breaches added in 2026 so far. Every one of these is verified, and every one put working email and password pairs into circulation.
| Breach | Date | Accounts | What leaked |
|---|---|---|---|
| June 2026 Stealer Logs | Jun 2026 | 56,278,397 | Email addresses, passwords |
| ADDI | Mar 2026 | 34,532,941 | Email addresses, credit scores, device information |
| Paidwork | Mar 2026 | 23,272,765 | Bank account numbers, dates of birth, device information |
| McGraw Hill | Apr 2026 | 13,500,136 | Email addresses, names, phone numbers, physical addresses |
| Carhartt | Aug 2026 | 12,933,413 | Email addresses, names, phone numbers, physical addresses |
| CarGurus | Feb 2026 | 12,461,887 | Email addresses, IP addresses, names, phone numbers |
Source: Have I Been Pwned — 1,034 breaches covering 17.8 billion accounts, 81 of them added in 2026. Figures as of 6 September 2026.
The pattern worth noticing
Not one of these is a company whose security your business controls. Your exposure came from a vendor, a supplier, or a site an employee signed up for with their work email in 2019. That is why reuse is the whole ballgame — you cannot stop the breach, you can only make sure the password it leaks does not open anything else.
Found Something You Did Not Like?
We are an IT company in Davenport, Florida, and this is ordinary work for us — sorting out reused credentials, switching on MFA properly, and monitoring a company domain so the next dump is something you hear about from us rather than from a customer.
Monday to Friday, 8am–6pm Eastern. We reply to new requests within two business hours.