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Verified 2026 Official Guidelines

Official Portal Photo & Signature Size Chart

Comprehensive reference table of exact pixel dimensions, millimeter print sizes, DPI standards, and kilobyte caps across 50+ global visas, competitive exams, passports, and civil service portals.

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Portal / Authority Category Dimensions File Size Limit DPI & Format Background Quick Tool
SSC CGL, CHSL, MTS, GD Indian Exams 350 × 450 px (3.5 × 4.5 cm) 20 KB to 50 KB JPEG / JPG · 100–300 DPI Light / White Resize SSC CGL, CHSL, MTS, GD →
SSC Signature (All Exams) Indian Exams 140 × 60 px (4.0 × 2.0 cm) 10 KB to 20 KB JPEG / JPG · 100–300 DPI White Paper Resize SSC Signature (All Exams) →
UPSC Civil Services (IAS/IPS) Indian Exams 350 × 450 px (3.5 × 4.5 cm) 20 KB to 50 KB JPG · 300 DPI White Resize UPSC Civil Services (IAS/IPS) →
UPSC Signature Upload Indian Exams 280 × 140 px (2:1 Ratio) 10 KB to 20 KB JPG · 300 DPI White Paper Resize UPSC Signature Upload →
NEET-UG Passport Photo Indian Exams 413 × 531 px (3.5 × 4.5 cm) 10 KB to 200 KB JPG · 200–300 DPI White with Name & Date Resize NEET-UG Passport Photo →
NEET-UG Postcard Photo (4×6") Indian Exams 1200 × 1800 px (4 × 6 inch) 10 KB to 200 KB JPG · 300 DPI White Resize NEET-UG Postcard Photo (4×6") →
NEET-UG Signature & Left/Right Fingers Indian Exams 140 × 60 px / Full Hand Palm 4 KB to 30 KB JPG · 200 DPI White Paper Resize NEET-UG Signature & Left/Right Fingers →
JEE Main & Advanced Photo Indian Exams 413 × 531 px (3.5 × 4.5 cm) 10 KB to 200 KB JPEG / JPG · 200–300 DPI White (80% Face) Resize JEE Main & Advanced Photo →
IBPS PO, Clerk, RRB Photo Indian Exams 200 × 230 px (4.5 × 3.5 cm) 20 KB to 50 KB JPG · 200 DPI Light / White Resize IBPS PO, Clerk, RRB Photo →
IBPS Signature Upload Indian Exams 140 × 60 px 10 KB to 20 KB JPG · 200 DPI White (Black Ink) Resize IBPS Signature Upload →
IBPS Left Thumb Impression (LTI) Indian Exams 200 × 200 px (1:1 Ratio) 10 KB to 20 KB JPG · 200 DPI White Paper Resize IBPS Left Thumb Impression (LTI) →
IBPS Handwritten Declaration Indian Exams 800 × 400 px (10 × 5 cm) 50 KB to 100 KB JPG · 200 DPI White (Black Ink) Resize IBPS Handwritten Declaration →
GATE (IIT) Candidate Photo Indian Exams 480 × 640 px (3.5 × 4.5 cm) 20 KB to 200 KB JPEG · 200 DPI White Resize GATE (IIT) Candidate Photo →
Railway Recruitment Board (RRB NTPC/Group D) Indian Exams 350 × 450 px 20 KB to 50 KB JPG · 100 DPI Light / White Resize Railway Recruitment Board (RRB NTPC/Group D) →
SBI PO & Clerk Photo Indian Exams 200 × 230 px 20 KB to 50 KB JPG · 200 DPI Light / White Resize SBI PO & Clerk Photo →
CUET UG & PG Photo Indian Exams 413 × 531 px 10 KB to 200 KB JPG · 200 DPI White (80% Face) Resize CUET UG & PG Photo →
State PSC Exams (UPPSC, BPSC, MPSC, TNPSC) Indian Exams 350 × 450 px (3.5 × 4.5 cm) 20 KB to 50 KB JPG · 150–300 DPI White / Light Resize State PSC Exams (UPPSC, BPSC, MPSC, TNPSC) →
Passport Seva (India Online Portal) Passports & IDs 413 × 531 px (35 × 45 mm) 20 KB to 50 KB JPG / JPEG · 300 DPI Pure White Resize Passport Seva (India Online Portal) →
PAN Card Photo (NSDL / UTIITSL) Passports & IDs 213 × 213 px (2.5 × 3.5 cm) Under 50 KB JPEG · 300 DPI White Resize PAN Card Photo (NSDL / UTIITSL) →
PAN Card Signature (NSDL / UTIITSL) Passports & IDs 400 × 200 px (2 × 4.5 cm) Under 20 KB JPEG · 300 DPI White Paper Resize PAN Card Signature (NSDL / UTIITSL) →
Aadhaar Card Update Document (UIDAI) Passports & IDs A4 Document Scan Under 2 MB PDF / JPEG · 150–300 DPI N/A Resize Aadhaar Card Update Document (UIDAI) →
Indian Driving Licence (Sarathi Parivahan) Passports & IDs 413 × 531 px (35 × 45 mm) 10 KB to 20 KB JPEG · 200 DPI White Resize Indian Driving Licence (Sarathi Parivahan) →
US Visa (DS-160, DS-260) & DV Lottery Global Visas 600 × 600 to 1200 × 1200 px (2 × 2") Under 240 KB JPEG · 300 DPI Pure White / Off-White Resize US Visa (DS-160, DS-260) & DV Lottery →
US Passport Renewal Online Global Visas 600 × 600 to 1200 × 1200 px (1:1) Under 240 KB JPEG · 300 DPI White Resize US Passport Renewal Online →
Schengen Visa (France, Germany, Italy, Spain) Global Visas 413 × 531 px (35 × 45 mm) Under 200 KB JPG · 300 DPI Light Grey / White Resize Schengen Visa (France, Germany, Italy, Spain) →
UK Passport & UKVI Visa Portal Global Visas Minimum 600 × 750 px (3:4 ratio) 50 KB to 10 MB JPG · 300 DPI Light Grey / Cream Resize UK Passport & UKVI Visa Portal →
Canada Visa & Express Entry (IRCC) Global Visas 420 × 540 px (35 × 45 mm / 5:7) 60 KB to 240 KB JPEG · 300 DPI Pure White Resize Canada Visa & Express Entry (IRCC) →
Australia Visa (ImmiAccount) Global Visas 413 × 531 px (35 × 45 mm) Under 500 KB JPG / PNG · 300 DPI Plain White Resize Australia Visa (ImmiAccount) →
Singapore Visa (ICA Portal) Global Visas 400 × 514 px (35 × 45 mm) Under 150 KB JPEG · 300 DPI Pure White Matt Resize Singapore Visa (ICA Portal) →
Malaysia Passport & eVisa (MyOnline) Global Visas 413 × 591 px (35 × 50 mm) Under 100 KB JPEG · 300 DPI Plain White Resize Malaysia Passport & eVisa (MyOnline) →
Dubai & UAE Tourist / Green Visa (ICP) Global Visas 413 × 531 px (35 × 45 mm) Under 100 KB JPEG · 300 DPI White Resize Dubai & UAE Tourist / Green Visa (ICP) →
China Visa (COVA Portal) Global Visas 390 × 567 px (33 × 48 mm) 40 KB to 120 KB JPEG · 300 DPI Pure White Resize China Visa (COVA Portal) →
Japan e-Visa & COE Photo Global Visas 413 × 531 px (45 × 35 mm) Under 200 KB JPG · 300 DPI Plain White Resize Japan e-Visa & COE Photo →
Saudi Arabia Umrah / Tourism Visa (Muqeem & Nusuk) Global Visas 600 × 600 px (2 × 2 inch square) Under 100 KB JPEG · 300 DPI White Resize Saudi Arabia Umrah / Tourism Visa (Muqeem & Nusuk) →
New Zealand Visa & NZeTA (Immigration Online) Global Visas 450 × 600 px (3:4 ratio) Under 250 KB JPG · 300 DPI Light Colored Plain Resize New Zealand Visa & NZeTA (Immigration Online) →
YouTube Custom Video Thumbnail Social & Web 1280 × 720 px (16:9 HD) Strictly Under 2 MB JPG / PNG · 72–150 DPI Any Vibrant Resize YouTube Custom Video Thumbnail →
LinkedIn Personal Profile Banner Social & Web 1584 × 396 px (4:1 Aspect) Under 500 KB JPG / PNG · 72–150 DPI Any Brand Resize LinkedIn Personal Profile Banner →
WhatsApp Profile Picture (DP) Social & Web 640 × 640 px (1:1 Circular) Under 200 KB JPG / PNG · 72–150 DPI Any Clean Resize WhatsApp Profile Picture (DP) →
Instagram Square Post & Avatar Social & Web 1080 × 1080 px (1:1 Ratio) Under 1 MB JPG · 72–150 DPI Any Creative Resize Instagram Square Post & Avatar →
Twitter / X Profile Header Banner Social & Web 1500 × 500 px (3:1 Widescreen) Under 2 MB JPG / PNG · 72–150 DPI Any Safe Zone Resize Twitter / X Profile Header Banner →
Facebook Profile & Page Cover Photo Social & Web 820 × 312 px (Desktop Safe) Under 500 KB JPG / PNG · 72–150 DPI Any Safe Zone Resize Facebook Profile & Page Cover Photo →
Related Print & Compliance Tools: Signature Resizer Change Image DPI to 300 CM to Pixels at 300 DPI Pixels to CM Converter EXIF Metadata Remover Social Media Image Resizer

Core Biometric Principles: How Portals Validate Uploaded Photos

Government immigration departments, consular visa facilities, and public service commissions employ automated biometric verification algorithms to cross-reference submitted applicant photos against international standards (ICAO Doc 9303, ISO/IEC 19794-5). Submissions that fail automated checks are rejected before human officers ever review the application.

70% to 80% Crown-to-Chin Ratio

Biometric scanners compute facial bounding boxes from the base of the chin to the vertex (top) of the head. This distance must encompass strictly between 70% and 80% of total vertical canvas height. Cropping too tightly or zooming excessively results in automated rejection.

Physical Millimeters to Digital Pixels

Physical print specs must be converted to exact integer pixels: Pixels = (mm / 25.4) × DPI. A standard 35×45 mm passport photo reproduced at 300 DPI yields exactly 413.38 × 531.49 pixels (rounded to 413 × 531 px).

Uniform Background Lighting (#FFFFFF / #F2F2F2)

Background perimeter luminance filters check for shadows behind the ears and neck. Uneven room lighting or wallpapers trigger boundary errors. Biometric photos mandate pure white (#FFFFFF) or light grey (#F2F2F2) backdrops.

Adaptive Ink Binarization for Signatures

Candidate signature files require stark threshold transitions between ink lines and paper. Low-pass filters cause faint pen strokes to be rejected as blank files. PixelKit applies high-contrast adaptive thresholding to retain sharp ink strokes under strict 10–20KB limits.

Technical Solutions to Common Portal Upload Errors

Cross-Platform EXIF Orientation Correction: Smartphone cameras record photos in landscape sensor orientation and append an EXIF rotation tag. Many legacy government portal scripts disregard EXIF tags, displaying photos rotated sideways on admit cards. PixelKit physically bakes rotation into the raw bitmap data, guaranteeing upright display on all legacy and modern systems.

Color Gamut Calibration (sRGB vs Display P3): Modern Apple iPhone and Android flagships photograph in the wide DCI-P3 color spectrum. However, web form upload validators and passport print systems expect standard sRGB color profiles. PixelKit converts chromatic coordinates to sRGB during client-side canvas processing, preventing washed-out skin tones or uncalibrated color shifts.

Eliminating DCT Compression Artifacts: When aggressive compression is applied to small file sizes like 20 KB or 50 KB, standard 8×8 Discrete Cosine Transform (DCT) block boundaries become visible around eyes and iris contours. PixelKit's iterative binary-search quantization tuning preserves smooth facial skin gradients while keeping file size strictly below portal upload limits.

Frequently Asked Questions About Portal Specifications

Why do application portals reject uploaded photos despite matching pixel dimensions?
Portals use automated server scripts that inspect three parameters simultaneously: (1) exact file size ceiling in kilobytes, (2) EXIF metadata orientation tags, and (3) color space encoding (sRGB). If your camera saved an image in Display P3 color space or if a phone recorded a sideways EXIF rotation tag, legacy portal servers reject the file immediately. PixelKit strips uncalibrated EXIF metadata, converts coordinates to sRGB, and quantizes bytes to guarantee acceptance.
How do I convert mm to pixels at 300 DPI for passport photos?
Use the official formula: Pixels = (Millimeters / 25.4) × DPI. For a standard 35 × 45 mm passport photo at 300 DPI: Width = (35 / 25.4) × 300 = 413.38 pixels (round to 413 px), and Height = (45 / 25.4) × 300 = 531.49 pixels (round to 531 px). PixelKit includes pre-calculated dimension presets so you never have to calculate subpixel fractions manually.
What is the 70% to 80% biometric facial framing rule?
ICAO Doc 9303 and international passport agencies mandate that the applicant face (measured vertically from the bottom of the chin to the crown of the head) must occupy between 70% and 80% of total image height. Cropping too closely into the forehead or zooming too far out leaves non-compliant margins that trigger biometric software disqualification.
Can I resize photos for Indian competitive exams (SSC, UPSC, NEET) on a phone?
Yes. PixelKit runs 100% inside your mobile browser (Mobile Safari, Chrome, Samsung Internet) without downloading any apps. You can crop, resize to 350 × 450 px, and compress strictly between 20KB and 50KB in under two seconds.
Are candidate photos and identity documents uploaded to any remote server?
Never. PixelKit is built on a zero-knowledge architecture. All image processing, canvas resampling, and binary search compression execute directly inside your device RAM using client-side WebAssembly. Zero bytes leave your phone or computer.