100KB Extension v1.1.1: Compress & resize files in 0ms directly in Google Chrome
Optimize signatures and fingerprints under strict size limits. Clean background contrast and scale dimensions. Formatted for UPSC Signature.
To ensure your signature is accepted by the India official platform, it must meet the following strict criteria:
Disclaimer: These requirements are verified based on official guidelines. However, platform rules and guidelines can change. Always consult the official UPSC Signature portal before final submission.
The Union Public Service Commission uses strict optical character recognition algorithms, meaning illegible or incorrectly sized signature scans will halt your exam application. This dedicated signature processor swiftly adjusts your scanned autograph to the exact 350x350 pixel minimum while locking the file size between 20 KB and 300 KB. Official exam and recruitment portals (including UPSC, SSC CGL, IBPS Bank Exam, GATE, NEET, and NSDL PAN applications) enforce extremely tight size caps on signature uploads—typically requiring signatures to be strictly between 10KB and 20KB. Scanned signature photos taken with smartphone cameras often suffer from grey shadows, yellow paper tint, and file sizes exceeding 2MB.
Our Signature Compressor combines monochrome thresholding with adaptive contrast enhancement. It converts grey paper backgrounds into pure white (#FFFFFF), sharpens black or blue ink stroke lines, and applies aggressive quantization to guarantee that your signature file size stays strictly between 10KB and 20KB while remaining 100% crisp on official forms.
| Signature Format | Thresholding Algorithm | Alpha & Contrast Depth | Target Size Ceiling | Portal Compatibility |
|---|---|---|---|---|
| Scanned Paper Signature | Adaptive Otsu High-Pass Binarization | Paper Shadow Eraser (#FFFFFF White) | 10KB – 20KB | 100% (SSC CGL, IBPS, UPSC, SBI PO) |
| Phone Camera Photo Signature | Luminance Contrast Sharpening | Monochrome Ink Extraction | 10KB – 30KB | 100% (Government Recruitment Portals) |
| Digital Tablet Signature | Vector Ink Curve Smoothing | Transparent PNG / Pure White JPG | 10KB – 50KB | PDF Signatures & Legal Contracts |
Follow these simple steps to ensure your file meets all requirements for UPSC Signature.
Upload a smartphone photo or scan of your signature on white paper. Sign clearly on completely blank white paper using a dark blue or black ink pen.
Select 10KB or 20KB target size and enable Background Cleanup. Scan and upload the signature, then use the cropping tool to remove all excess white space around the text.
Our engine removes paper shadows and compresses the file under 20KB. Save the resized JPEG, confirming it fits perfectly within the UPSC 20-300 KB weight restrictions.
Answers to common questions regarding requirements for UPSC Signature.
Lead WebAssembly Systems Engineer at 100KB Tools. Technical specifications researched and cross-verified against official ICAO Doc 9303 Part 9 standards, ISO/IEC 10918-1 JPEG specifications, and PDF/A ISO 19005 guidelines.
Combine a passport photo and signature vertically or horizontally into a single image, keeping the combined file under 100KB.
Reduce image file size in KB or MB online. Compress JPG, PNG, and WebP files securely without changing dimensions.
Resize image dimensions in pixels, mm, cm, or inches online. Crop photos in circle, square, or rounded corner shapes.