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UPSC Civil Services · NDA · CDS · OTR · SSC Signature Compliant

UPSC Signature Resizer & Compressor

Crop excess border margins, rescale to 280 × 140 px (2:1 ratio), and compress under 20KB JPG with pin-sharp ink strokes. Private, client-side processing.

All-in-One Convert Compress Crop Resize Portal Presets
Drop photo for passport or visa portal or browse files

Supports JPG, PNG, HEIC, WEBP, PDF, SVG, TIFF, AVIF, GIF, BMP

No file size limit Add unlimited photos 100% in-browser

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UPSC Official Signature Specifications Table

Detailed upload parameters mandated by UPSC One-Time Registration (OTR) and exam guidelines:

Parameter UPSC Specification PixelKit Auto-Configured Settings
File Format JPG / JPEG format only Automatic JPG output
File Size Limits 10 KB to 20 KB maximum Binary-search lands strictly under 20 KB
Pixel Dimensions 280 × 140 px up to 350 × 350 px Auto-scales to 280 × 140 px
Aspect Ratio 2:1 wide horizontal rectangle 2:1 signature crop preset preloaded
Paper & Ink Black ink on unlined clean white paper High-contrast ink preservation filter

Common UPSC Signature Upload Errors & Fixes

⚠ "Signature file size exceeds 20 KB limit"

Cause: Scanning a full A4 sheet with vast white margins wastes 90% of your byte budget on background pixels.
Fix: Use PixelKit’s 2:1 Crop Studio to tightly outline the ink signatures, cutting file size by 75% before compression.

⚠ "Uploaded image is blurry or indistinct"

Cause: Aggressive single-pass lossy compression degrades delicate pen strokes.
Fix: PixelKit’s iterative quantization preserves sharp text vectors and line art contrast without blocky artifacts.

Frequently asked questions

What are the exact signature upload rules for UPSC exams?
Union Public Service Commission (UPSC Civil Services IAS/IPS, NDA, CDS, and OTR registration) requires candidate signatures in JPG/JPEG format weighing between 10 KB and 20 KB. The recommended pixel dimensions are 280 × 140 pixels (3.5 cm width × 1.5 cm height), written in clear black ink on smooth white paper.
Why does the UPSC portal reject signature uploads?
The most frequent cause is exceeding the strict 20 KB limit or failing the 2:1 width-to-height ratio. When smartphone photos contain large empty margins around the signature, byte weight balloons. PixelKit’s Crop Studio lets you frame the signature tightly before binary-search compression brings it safely under 20KB.
How do I keep pen strokes sharp when compressing to under 20KB?
PixelKit uses selective high-contrast chroma sampling and palette optimization that prevents JPEG compression artifact halos around ink lines, preserving legible signature contours.
Is my candidate signature kept secure and private?
100% yes. Signatures are legally binding biometric assets. PixelKit operates entirely inside your device browser memory via HTML5 Canvas and WebAssembly. No files or signatures are ever transmitted to cloud servers.