Online app which plots F(z) in the complex plane

[Adel Makram]

I am looking for an app that can instantaneously plot the function f(z) in the complex plane once z is given.
It would be much favorable if this process is fast which allows one to visualize f(z) when the user is moving the mouse on the complex plane to the location of z.
One possible application, is to visualize the zeros of the Riemann zeta function if one move the mouse on the critical line.

 

[jedishrfu]

My goto one is desmos but I’m not sure if it will handle complex values.

I found this one though

https://academo.org/demos/3d-surface-plotter/

 

[Mark44]

My goto one is desmos but I’m not sure if it will handle complex values.

I found this one though

https://academo.org/demos/3d-surface-plotter/

I took a look at this, but it doesn't seem to be what the OP needs. The graph of a complex function $f : \mathbb C \to \mathbb C$ requires four dimensions: two for the complex input and two more for the complex output. I don't have any good suggestions, though.

 

[Adel Makram]

I took a look at this, but it doesn't seem to be what the OP needs. The graph of a complex function $f : \mathbb C \to \mathbb C$ requires four dimensions: two for the complex input and two more for the complex output. I don't have any good suggestions, though.

I just need a 2D space, so that when I click any where in this plane (z), the app immediately plots the f(z) on the same plane. This should also draw f(z) as a continuous curve if the function is analytic.