“CircuitBee provides a platform for you to share live versions of your circuit schematics on your websites, blogs or forums. Features include full zooming capability, panning, and even mouse over tips about symbols in the schematic.” via CircuitBee

The service is free and requires registration, but not much else. Once registered you are free to upload your circuit diagrams which are then run through CircuitBee’s servers. CircuitBee converts your drawings into embeddable objects, allowing others to view your project easily. via Hackaday