Your Privacy is Protected
We use k-anonymity to check your password without ever sending it to any server. Only the first 5 characters of the hash are sent.
Your password is hashed locally and never sent to any server
How It Works
- Your password is hashed using SHA-1
- Only the first 5 characters of the hash are sent
- We receive all matching hash suffixes
- Your password is checked locally against the matches
Powered by Have I Been Pwned
How to Check If Your Password Has Been Leaked
- 1
Enter Your Password
Type the password you want to check into the input field. Your password stays in your browser and is never transmitted in plain text to any external server. - 2
Click Check Password
Press the Check Password button. The tool instantly hashes your password using SHA-1 and sends only the first 5 characters of the hash to the Have I Been Pwned API. - 3
Review the Results
The tool compares your full hash locally against all returned hash suffixes. You will see whether your password was found in any known data breach and how many times it appeared. - 4
Take Action If Breached
If your password appears in a breach, change it immediately on every account that uses it. Generate a strong replacement with a password generator and enable two-factor authentication for extra protection.
Who Needs a Password Breach Checker?
Everyday Internet Users
IT Administrators and Security Teams
Developers Building Auth Systems
Small Business Owners
Why Check for Breached Passwords?
A password breach checker lets you find out whether a password you use has been exposed in a publicly known data breach. Every year, billions of credentials are leaked through hacks targeting companies of all sizes. Attackers compile these leaked passwords into massive dictionaries and use them in credential-stuffing attacks, where automated scripts try stolen username-and-password pairs across thousands of websites. If you reuse passwords, a single breach can unlock your email, bank accounts, and social media profiles. Checking your passwords against breach databases is the fastest way to discover whether you are at risk.
FindUtils Password Breach Checker uses the Have I Been Pwned k-Anonymity API, which means your actual password is never sent over the network. Instead, the tool hashes your password with SHA-1 in your browser, sends only the first five characters of that hash to the API, and then compares the full hash locally against all returned results. This approach gives you a definitive answer without sacrificing your privacy. If you discover a compromised password, use our Password Generator to create a strong replacement and verify its resilience with the Password Strength Checker.
Beyond individual password checks, building good credential hygiene means using unique passwords for every site, enabling two-factor authentication, and storing your credentials in a password manager. For organizations, integrating breach-checking into onboarding and periodic audits dramatically reduces the attack surface. Whether you are a casual user protecting personal accounts or a security professional hardening an enterprise, regularly verifying passwords against breach data is one of the simplest and most effective defenses available.
How It Compares
Several services let you check passwords against breach databases. Have I Been Pwned is the most widely recognized, offering both a web interface and an API. FindUtils Password Breach Checker uses that same API but adds a layer of convenience: no account required, no CAPTCHA, and all hashing happens client-side in your browser. Other alternatives like Firefox Monitor and Google Password Checkup are tied to specific ecosystems and require you to be signed in. Dedicated apps such as 1Password Watchtower check stored vault entries but require a paid subscription.
FindUtils stands out because it is completely free, requires no sign-up, and processes everything locally. You can check as many passwords as you need without hitting rate limits or creating yet another account. For users who want additional layers of protection, pairing this tool with the Password Pattern Validator and the Hash Comparison Tool provides a comprehensive password security workflow entirely within a single platform.