Crypto Tools
8 free crypto tools that run entirely in your browser.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
Bcrypt Hash Generator
Generate bcrypt-format password hashes with configurable rounds.
AES Encrypt/Decrypt
Encrypt and decrypt text with AES-256-GCM and a passphrase, in your browser.
HMAC Generator
Generate HMAC signatures (SHA-1/256/384/512) from a message and secret key.
Caesar Cipher / ROT13
Encode and decode text with a Caesar shift cipher, including ROT13.
RSA Key Generator
Generate an RSA public/private keypair in PEM format, in your browser.
Password Strength Checker
Test password strength and estimate entropy locally.
JWK to PEM
Convert RSA and EC JSON Web Keys to PEM format in your browser.
About crypto tools
These 8 crypto tools cover the tasks developers reach for most. Each one runs client-side, so your input never leaves your device and every tool works offline after the first visit. No account, no upload, no tracking.