Portal Compliance • 10 Min Read • Updated August 2026

Photo & Signature Preparation Guide for Government & Exam Portals

OR

By One Resizer Technical Editorial Team

Verified against client-side browser engines & portal test specs

Why Portal File Validations Reject Thousands of Submissions

Government application systems (such as SSC CGL/CHSL, UPSC Civil Services, IBPS Bank PO, Railway RRB, and State PSC portals) utilize automated validation servers that reject images failing strict criteria:

File Size Violations: Image exceeds 50 KB or is smaller than 20 KB.
Dimension Non-Compliance: The photo is not precisely 3.5 × 4.5 cm or 350 × 450 px.
Background Noise: Signature photo has dark grey background shadows from phone camera capture.

Master Portal Specification Guide (2026 Standards)

Portal / Organization	Photo Requirement	Signature Requirement	Allowed Format
Staff Selection Commission (SSC)	20 KB – 50 KB (3.5 × 4.5 cm)	10 KB – 20 KB (4.0 × 2.0 cm)	JPG / JPEG only
Union Public Service Commission (UPSC)	20 KB – 300 KB (Min 350x350 px)	20 KB – 300 KB (Min 350x350 px)	JPG / JPEG only
IBPS / SBI Banking Exams	20 KB – 50 KB (200 × 230 px)	10 KB – 20 KB (140 × 60 px)	JPG / JPEG only
NTA (NEET / JEE Main)	10 KB – 200 KB (White background)	4 KB – 30 KB (White background)	JPG / JPEG only

Step-by-Step Preparation Workflow

Preparing Your Signature in 30 Seconds

Sign clearly using a black ballpoint pen on plain, unlined white paper.
Capture a well-lit photo from directly above without casting a hand shadow.
Open One Resizer's Signature Resizer.
Set target width to 140 px and height to 60 px (or exam specific dimensions).
Use the Background Whitening & Contrast Slider to turn grayish paper pure white (RGB 255, 255, 255).
Set target size to 15 KB and click Download.