GATE photo
Use a colour photo on a plain background, face clear and frontal. This export targets 10–200 KB, a common window. Your year’s brochure wins if it differs.
Do not assume the NEET file is accepted unchanged. Read the GATE brochure.
What usually goes wrong
Blur and a small face are the usual problems, not the file format.
What this page checks
JPEG starting at 350×450 pixels, 10–200 KB, unless your brochure prints a different limit.