No, in the UK, you cannot take your driving theory test online from home. You must take the test in person at an official DVSA (Driver and Vehicle Standards Agency) test centre. The test is conducted under strict conditions to ensure fairness and prevent cheating.
However, you can practice for the theory test online using various websites and apps, which offer mock tests, hazard perception clips, and study materials based on the Highway Code. But for the official test, you need to book an appointment at a designated test centre.