ChaCha20 Encrypt / Decrypt

Stream cipher experimentation with key, nonce, and text handled entirely in your browser.

Key (32 bytes hex)

Nonce (8 or 12 bytes hex)

Plaintext

Ciphertext (hex)

ChaCha20 Online Encrypt / Decrypt Tool

Use this free ChaCha20 encryption tool to convert plaintext into ciphertext (and back again) entirely in your browser. Paste a 32-byte key, choose an 8-byte or 12-byte nonce, and instantly stream cipher your message into hex output without uploading secrets to any server.