RRB signature resizer
Make your signature fit the Railway RRB NTPC (Graduate and Under Graduate) and Section Controller form rules. Pick an image, adjust the crop, and download a file that's already within the limits.
🔒 Runs in your browser. Your photos are never uploaded.
No photo upload needed. RRB takes your photo live with your webcam or phone camera inside the form, so only the files below need resizing. Sit facing a window or lamp against a plain wall, with no cap, mask or spectacles.
Also needed: SC/ST certificate (free travel only) as a PDF (up to 400 kb). Make the PDF here.
RRB upload requirements
| Document | File size | Dimensions | Format | Other rules |
|---|---|---|---|---|
| Live photograph | Captured live in the form | – | – | Taken with your webcam or phone front camera Plain white background, plain dark clothes Head fills at least half the frame, shoulders and chest covered No cap, mask or spectacles; eyes fully open Photographing a printed or on-screen photo leads to rejection |
| Signature | 30 to 49 KB | 140 × 60 px (3.5 × 2 cm) | JPG | Background: white paper 140 × 60 px is the minimum, not an exact size Centred in a 35 × 20 mm box, scanned at 100 DPI or more Black ink, running (joined) handwriting No capital or separated block letters, no thumb impression |
| SC/ST certificate (free travel only) | Up to 400 KB | Not stated | Only if claiming free railway travel Latest certificate, valid on the closing date |
Based on the official RRB notice for the 2026 cycle (source). Last checked 17 Oct 2026. Checked against the NTPC Graduate (CEN 06/2026) and NTPC Under Graduate (CEN 07/2026) notices and the Section Controller notice (CEN 04/2025), which all use the same upload rules. Some websites quote other signature sizes such as 30 to 70 KB; the official notices say 30 to 49 KB. Rules can change between cycles, so match these against the notification for your exam before you submit.
How to resize for RRB
- Sign on plain white paper with the pen colour your notification asks for (usually black). Photograph it from directly above in good light.
- Choose each image above. Drag and zoom so it fills the frame.
- Check the size shown under the preview, then tap Download JPG and upload that file on the RRB portal.
Questions people ask
Do I need to upload a photo for RRB?
No. RRB now takes your photo live with your webcam or phone camera while you fill the form, so there's no photo file to resize. Sit in good light against a plain wall, with no cap, mask or spectacles.
What signature size does RRB accept?
30 to 49 KB, 140 × 60 px (3.5 × 2 cm). Sign on plain white paper in the ink colour the notification asks for (usually black), then photograph or scan it.
Why was my upload rejected even though the size was right?
Portals also check things a resizer can’t fix: a blurred or old photo, a face that is too small, caps or dark glasses, a coloured background, or a signature in capital letters. Retake the image if any of these apply.
Is it safe to use this tool?
Yes. Your image is processed inside your browser and is never sent to any server. You can even switch off mobile data after the page loads and it still works.
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