PwnSniff от BreachRadar

PwnSniff uses the Have I Been Pwned API to scan your passwords and alert you if they've appeared in known breaches. It never sends your actual passwords—only partial hashes, keeping your data private. Works locally, fast, and efficiently.

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Features

• Uses k-Anonymity model (via HIBP)
• No password data leaves your device
• Quick breach checks from your browser
• Lightweight & open-source