Flow: Generate keys → Share public key with friend → Friend encrypts (left) → You decrypt (right) with private key
Send (Encrypt)using recipient's public key
Type a message below to encrypt and send
0/190 bytes
Receive (Decrypt)using your private key
Paste encrypted text below to decrypt
RSA-OAEP 2048-bit SHA-256 · Pure JS (node-forge) · All processing in your browser · Nothing sent to any server
About RSA Secure Messaging
Generate RSA key pairs, encrypt messages with public key, decrypt with private key - for secure communication. This free online tool works directly in your browser with no installation or signup required. Your data stays private as all processing happens locally on your device.
Features
- 100% free, no registration needed
- Works offline - all processing in your browser
- Privacy-first: your data never leaves your device
- Mobile-friendly responsive design
- Available in 10 languages