Password Leak Checker

Check if passwords have been exposed in data breaches

Absolute Security

Your password is NOT sent. Tool uses k-Anonymity: only sends the first 5 characters of the SHA-1 hash to the HaveIBeenPwned API, then check locally.

Tips for creating secure passwords

Minimum 12 characters
Combining uppercase letters, lowercase letters, numbers, special characters
Do not use personal information
Each account has a separate password
Use Password Manager
Enable 2FA when possible

Password Leak Checker Online Free - Check Leaked Passwords for Free | HaveIBeenPwned

Password leak checker online free - Tool to check whether passwords have been leaked in data breaches for free. Using HaveIBeenPwned API with k-Anonymity - the password is NOT sent, only the first 5 characters of the SHA-1 hash. Displays the number of times the password appears in the data compiled. Tips for creating secure passwords. Completely free, absolutely confidential.

Outstanding features

Check if passwords are leaked in data compilations
Use HaveIBeenPwned API - the world's largest database
k-Anonymity: password is NOT sent
Send only the first 5 characters of the SHA-1 hash
Shows the number of times the password appears in the
Obvious results: Safe (green) or Exposed (red)
Toggle show/hide password when entering
Tips for creating secure passwords
Handles hashes completely in the browser
Completely free, no registration required

Why is it necessary to check for leaked passwords? What is Data Breach?

Data breach is a security incident when hackers penetrate the system and steal user data, including emails, passwords, and personal information. Major breaches: LinkedIn (164 million), Adobe (153 million), MySpace (360 million), Collection #1 (773 million). Stolen data is often sold or published on the dark web. If you use a leaked password, hackers can: Credential stuffing - try passwords on many websites. Brute force is faster because it knows common passwords. Targeted attack if your email is known. HaveIBeenPwned (HIBP) collects and indexes more than 12 billion exposed passwords. This tool helps you check if the password is in that database, so you can change it immediately if necessary.

Benefits when used

  • •Know if your password has been leaked so you can change it immediately
  • •Absolute security - password does not leave the browser
  • •Check before using a new password
  • •Avoid credential stuffing attacks
  • •Raise awareness about password security
  • •Free, fast, easy to use

Instructions for checking leaked passwords

  1. 1Enter the password to check in the input box
  2. 2Click the eye icon to show/hide the password if necessary
  3. 3Press Enter or click the search button
  4. 4Wait a few seconds for the tool to hash and check
  5. 5View results: Green = Safe, Red = Exposed
  6. 6If exposed: see the number of occurrences and CHANGE NOW
  7. 7Read tips for creating secure passwords below

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