A passkey is a digital credential built on WebAuthn and FIDO2 standards that replaces passwords with synchronized, phishing-resistant asymmetric cryptographic keypairs.
A Passkey is a consumer-friendly implementation of the FIDO2 and WebAuthn standards. Instead of creating, memorizing, and entering text passwords, passkeys generate a private-public cryptographic keypair tied to a specific domain. The private key remains securely stored inside the device's hardware enclave (Secure Enclave or TPM) and syncs across devices via end-to-end encrypted cloud ecosystems (Apple iCloud Keychain, Google Password Manager, 1Password).
| Security Property | Passkeys | Passwords |
|---|---|---|
| Phishing Resistance | Immune (Bound to domain origin by browser) | Vulnerable to fake phishing websites |
| Server Credential Storage | Public keys only (harmless if leaked in breach) | Hashed passwords (vulnerable to cracking) |
| User Experience | Instant biometrics (Touch ID / Face ID) | Typing, memorizing, 2FA codes |
| Credential Reuse | Cryptographically unique per website | Frequently reused across accounts |
Free, browser-based utilities to test, generate, and inspect Passkeys Cryptographic Passwordless Authentication payloads directly.
Generate secure passwords, passphrases, and PINs with real-time strength analysis.
Generate and verify cryptographic hashes with multiple algorithms.
Decode, inspect, and validate JWT tokens with claim and signature analysis.
