100% in your browser — files never uploaded
RRB Group D CEN 09/2025 official requirements
Official signature requirements: JPG/JPEG, 30–49 KB, at least 140×60 pixels and approximately 35 × 20 mm, 100 DPI.
CoreTools working output
420×240 pixels is the rounded CoreTools conversion/default from at least 140×60 pixels and approximately 35 × 20 mm at 300 DPI; it is not a separately published official pixel requirement.
Prepare the signature in your browser
Upload, crop and preview locally, then adjust the editable fields if the application portal shows different current instructions.
RRB Group D CEN 09/2025 signature requirements
Official signature requirements: JPG/JPEG, 30–49 KB, at least 140×60 pixels and approximately 35 × 20 mm, 100 DPI.
Official requirement versus editable output
420×240 pixels is the rounded CoreTools conversion/default from at least 140×60 pixels and approximately 35 × 20 mm at 300 DPI; it is not a separately published official pixel requirement.
Check before submitting
Review the application portal preview before submission and use the editable fields if your current notice shows a different instruction.
Tool family
Base tool: Signature Resizer for Exams
Frequently asked questions
What are the official RRB Group D CEN 09/2025 signature requirements?
Official signature requirements: JPG/JPEG, 30–49 KB, at least 140×60 pixels and approximately 35 × 20 mm, 100 DPI.
Are the displayed pixels and DPI official?
420×240 pixels is the rounded CoreTools conversion/default from at least 140×60 pixels and approximately 35 × 20 mm at 300 DPI; it is not a separately published official pixel requirement.
Which official source was checked?
Source: Railway Recruitment Board, Ajmer, CEN 09/2025 Level-1; PDF pages 32-33, signature upload instructions. Source checked 2026-08-27.
Is my signature uploaded to a server?
No. Cropping, resizing and compression all happen entirely in your browser — the file never leaves your device.
Can I resize a signature for a different exam here?
This page is locked to RRB Group D. Use the full Signature Resizer to pick any other exam preset.
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