I have completed 10+3 Diploma can I opt for Online B.tech ??

Yes, you can apply for the B.Tech program. However, online B.Tech is invalid in India as per the ruling of the Supreme Court. But, there are approved courses for those who want to pursue the Online/Part-time/Distance B.Tech program. Such programs are called B.Tech Flexible Timing programs meant for working professionals who want to pursue graduation in engineering after a polytechnic diploma.

B.Tech Flexible Timing program is a 3 years undergraduate program that allows working professionals to continue their jobs while studying higher education. The program follows that hybrid mode of learning.

Interested candidates can apply to the universities such as Lingaya's Vidyapeeth University, Shri Venkateshwara University, and Sanskriti University. If you have any issue choosing the right university, you can compare the universities to know the best university for you through the unbiased platform College Vidya here https://collegevidya.com/.