RRB NTPC form: photo and signature size — live photo rules, signature 30-49 KB
Two things trip up RRB NTPC applicants this year. First, the photograph: the 2026 NTPC forms (CEN 06/2026 for graduates, applications till 6 November 2026, and CEN 07/2026 for 12th-level posts, till 13 November 2026) capture your photo live through the camera during the application — an old studio file may not be accepted the way it was in earlier years. Second, the signature: Railways ask for a JPG between 30 KB and 49 KB, which is a different band from the 10-20 KB that SSC and bank exams use. People who reuse their bank-exam signature file get rejected on size alone.
The live photo — what to do
Because the photo is captured live, preparation means you, not a file. Sit facing a plain, light-coloured wall with the light on your face, not behind you. No cap, no sunglasses, and keep the camera at eye level so the full face is visible and sharp. If the portal also offers an upload option in your category, the standby specification from the notice is a 35 x 45 mm passport-style photo, JPG, roughly 20-50 KB, on a white or light background — the passport photo maker here prepares exactly that, with a head guide and a file-size cap.
The signature — 30 to 49 KB, running hand
Sign in running handwriting (not block capital letters) with a black or blue pen on plain white paper, and photograph just the signature, cropped tight. The file must be a JPG of at least 140 x 60 pixels and between 30 KB and 49 KB. If your photo of the signature is bigger than 49 KB, compress it to a target of about 40 KB — the middle of the band is the safe place to land, because a file that slips under 30 KB is rejected just as firmly as one over the limit. That is the whole trick with Railway forms: not just smaller, but inside the band.
Before you press submit
Check three things. One, the signature file size reads between 30 and 49 KB (long-press the file and look at Details). Two, the signature is your running hand, the same style you will sign in the exam hall — mismatches cause trouble at document verification. Three, keep copies of the final files with the application number; the correction window, when it opens, is short. Everything above is free to prepare in your browser — the files never leave your device.