Password & Security Password Strength Checker Estimate password strength locally; input is never uploaded.
Password & Security Text Hash Generator Calculate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes locally.
Password & Security JWT Decoder Decode JWT header and payload locally without verifying the signature.
Password & Security Random Bytes Generator Generate cryptographically secure random bytes and export them as hex or Base64.
Password & Security Password Leak Checker Check a password against the public breach corpus with explicit consent using a five-character SHA-1 prefix; never send the password itself.
Password & Security Bcrypt Hash Generator Hash a password locally with bcrypt and a configurable work factor.
Password & Security Argon2id Hash Generator Hash a password locally with Argon2id using configurable memory, iterations, and parallelism.
Password & Security AES-GCM Encryption Tool Encrypt or decrypt local text with AES-GCM using a user-held passphrase and authenticated encryption.
Password & Security RSA Key Pair Generator Generate a local RSA-OAEP key pair and download the public and private keys; private keys are never uploaded or stored by the site.
Password & Security X.509 Certificate Decoder Inspect common X.509 certificate fields locally from a PEM or DER certificate; signature trust is not verified.
Password & Security PEM File Viewer Inspect PEM block labels and safely display decoded text or a hexadecimal preview without storing keys.
Password & Security TOTP Authenticator Generate time-based one-time passwords locally from a manually entered Base32 secret.
Password & Security Passphrase Generator Generate memorable passphrases from the local 2,048-word BIP39 English list using cryptographic randomness.
Password & Security Checksum Verifier Calculate SHA-256, SHA-384, or SHA-512 for a local file and optionally compare an expected digest.
Password & Security HMAC Generator Generate or verify HMAC-SHA-256 locally using a secret key that is never uploaded.
Password & Security Base64 File Encoder Encode or decode a local file or Base64 text with strict size limits; contents are not uploaded.
Password & Security Encryption Playground Explore authenticated AES-GCM encryption and decryption locally with an ephemeral passphrase-derived key.
Password & Security UUID Generator Generate RFC 4122 version 4 UUIDs locally with cryptographic randomness.
