Using this page, you can generate a file that contains a secret message. The secret message can only be obtained using the key that will be randomly generated.

Once you have saved the file, send it using whatever tool you want. Remember to transmit the key separately.*

The encryption is only as secure as the weakest link in the chain. Don't send the file and password over the same channel. If you're serious about security, don't send the password at all, but give it to the receiver manually.