Welcome to

The lab

Paste anything: a number, a sum mod n, a cipher, Base64, hex, binary, Morse...

Most used

Modular arithmetic calculator Chinese remainder theorem calculator Modular inverse calculator RSA encryption and decryption Prime factorization calculator Elliptic curve point arithmetic Caesar cipher breaker Vigenère cipher breaker Cipher identifier Base64 encoder and decoder Text to hex converter SHA-256, SHA-1 and MD5 step by step