Nshare

Share you clipboard-text or a website over the wifi-network.
To any device with Nshare installed.
This app just sends an udp-packet over the network with the data on port 12345.
It find other devices via the devices iptable.

There is no cloud provider to sniffe here.
Both devices need to be on the same subnet / wifi.

Try the Nshare-chrome-extension.
https://github.com/voidcode/nshare-chrome-extension