Yes, you can appear for JEE Main after diploma. But you have to qualify the Class 12 board exams too. Check- https://engineering.careers360.com/articles/what-btech-lateral-entry-eligibility

Hello Niharpodh,

Yes, After completing Diploma in Engineering graduates can apply for the JEE MAINS exam. You have to strengthen your knowledge in Physics, Chemistry and most importantly in Mathematics. Only passing the JEE MAINS cannot grab your admissions in  Engineering colleges. You have to excel in both JEE MAINS and ADVANCED. You will not be considered for lateral entry positions during admissions. You will have to join the first year of the Engineering Program like other candidates, who completed their 12th std.

All the Best for your future!!!

Yes, absolutely possible.

You'll need to qualify JEE Mains and JEE Advanced to get admission for your first year of four year degree course. Many state and private colleges are admitting  the diploma holders directly to the second year, but neither IITs nor NITs are assisting this.

I would suggest you to take up LEET (Lateral Entry Entrance Exam). This exam is vitally for diploma holders, who desires to get admissions for BE and B.Tech. Primarily, it can be a difficult process to face JEE after diploma. Whereas, this exam will take you through the journey, where you can sharpen your learning curve by taking a deep dive into basics and fundamentals. Subsequently, prepare for GATE exams investing your smart work, genuine effort and sincerity. You can sail through the GATE with the exceptional marks.

All the best!