Why Signature Compression Matters for Government Exams

Nearly every government job examination in India — from SSC CGL and IBPS PO to RRB NTPC and SBI Clerk — requires uploading a scanned signature during the online application process. The file size requirements are remarkably strict, typically demanding signatures between 10KB and 20KB in JPEG format.

A signature that is too large will be rejected by the portal. A signature that is too small may appear pixelated and unclear, leading to application rejection or verification issues later. Getting the exact file size is crucial for a smooth application process.

Government Exam Signature Requirements

Exam Signature Size Dimensions Format
SSC CGL / CHSL 10KB - 20KB 200×230 px JPEG
IBPS PO / Clerk 10KB - 20KB 200×230 px JPEG
SBI PO / Clerk 10KB - 20KB 200×230 px JPEG
RRB NTPC / Group D 10KB - 20KB 200×230 px JPEG
UPSC CSE 10KB - 20KB 200×230 px JPEG

How to Compress Your Signature to 10KB

  1. Sign on white paper using a black or dark blue pen. Keep your signature inside a roughly 2-inch square area for clean scanning.
  2. Scan or photograph the signature at 200-300 DPI. A smartphone photo in good lighting works fine.
  3. Crop tightly around the signature, leaving minimal whitespace. This helps achieve a smaller file size.
  4. Open the signature compressor tool on CompressKaro — it automatically resizes to 200×230 pixels and targets the 10KB minimum.
  5. Adjust the compression quality slider until the output preview shows exactly 10KB (or within the 10-20KB range).
  6. Download the compressed JPEG — the file is processed entirely in your browser.

Common Signature Upload Mistakes

  • Wrong format: Always use JPEG, not PNG. Government portals validate the actual file type, not just the extension.
  • Signature too small: A signature below 10KB may appear as a few pixels. If your compressed signature is unreadable, increase the quality slightly while staying under 20KB.
  • Incorrect dimensions: Most exam portals expect 200×230 pixel dimensions. Deviations cause automatic rejection.
  • White background issues: The scanned signature must have a clean white background. Gray or textured backgrounds may fail portal validation.

Complete Your Photo and Signature Together

For most government exams, you will also need a passport photo at the same dimensions (200×230 px) compressed to 20KB. You can use the photo compressor to 20KB to prepare both documents quickly. Preparing both files before starting your application saves time and prevents last-minute upload errors.

Process Sensitive Documents Privately

Your scanned signature, combined with your photo and personal details, is a valuable identity document. Processing these files on server-based compressors exposes your data to third parties. CompressKaro runs entirely in your browser — your signature image never leaves your computer, ensuring complete privacy during exam application season.