Free Online Cryptography & Security Tools
Generate hashes, TOTP codes, and decode OTP QR codes. SHA-256, SHA-512, and more. All processing happens in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
TOTP Code Generator
Generate time-based one-time passwords from a secret key for debugging 2FA flows.
OTP QR Code Decoder
Decode OTP QR codes to inspect otpauth:// URI parameters like issuer, secret, and algorithm.
About Cryptography Tools
Cryptographic tools help developers verify data integrity, debug authentication flows, and understand security mechanisms. Hash generators produce fixed-size digests (SHA-256, SHA-512) from any input — used for checksums, password storage, and digital signatures. TOTP generators create time-based one-time passwords for testing two-factor authentication implementations. OTP QR decoders inspect the otpauth:// URIs embedded in authenticator setup QR codes, revealing secrets, algorithms, and configuration parameters. All tools run client-side — your secrets never leave your browser.