One can not apply for AADHAAR card online. However you could apply for an appointment online . To apply AADHAAR card, without / wih online appointment, Visit to any nearby authorized Aadhaar enrollment center in India with copy of your identity and address proof. If your area is not listed on the website, you can go to the nearest Aadhaar card center, without prior appointment.
To know about AADHAAR card process click here: AADHAAR Card Registration Process.
Online appointment for AADHAAR card Enrollment has been started on a trial basis at selected Enrollment Centers. Be noted thatonline appointment facility is not available on all the AADHAAR card centers. . If your area is not listed in the online appointment application website, you will have to apply physically at your nearest AADHAAR card center.
How to book AADHAAR card appointment online click here: Appointment for AADHAAR Enrollment online?
How to contact nearby AADHAAR card center click here: Locate Nearby AADHAAR Card Centers?
To download AADHAAR card application form online click here: AADHAAR Card Application Form Download?
To know about the Documents required to apply for AADHAAR card click here: AADHAAR Card Documents Required