So searching for "squeaking clutch" just brought back results about the clutch pedal snapping off, but you can only hear the squeaking from outside the car as it's not the peal (close all windows and doors and you can't hear anything). But if I open the window or stand outside, pressing the clutch makes a very loud squeaking noise.

Any ideas?

Just in case..
It's not the pedal, but the actual clutch

 

I just noticed this about my car today too actually. Any help is greatly appreciated.

 

how do you stand outside your car AND press the clutch? haha

 

First thing that comes to mind is where the clutch line connects to the slave cylinder.
You can actually see it behind the oil filter.
Have someone in the car pressing the pedal and from within the engine bay, try to narrow it down.