Uploading the signature in JEE Main form is very simple. You need to have a clear picture of your signature in jpg or jpeg format. It should be between 10 KB to 100 KB.

For better understanding, you can check this -

https://engineering.careers360.com/articles/jee-mains-2026-registration-documents-list-released-at-jeemain-nta-nic-in

The form requires the candidates to upload the signature in JPEG format within 10-100KB format, if this condition is not fulfilled the photo will not get uploaded. Assistance from an e-mitra might be needed or you may choose to convert the sizes and the types of your documents from various converting applications available

to get details about registration and avoid getting confused follow the link below from careers360 How to fill JEE Main Application Form 2026? – Steps to Apply Online

Hello

Just read the full article given on the link I am attaching below, and get to know about the guidelines.

https://engineering.careers360.com/articles/jee-main-photo-and-signature-guidelines