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 2026 10KB - 20KB about 6 × 2 cm JPEG
IBPS PO / Clerk 10KB - 20KB 140×60 px JPEG
SBI PO / Clerk 10KB - 20KB (check your notification) check your notification JPEG
RRB NTPC / Group D varies by notice (check yours) check your notification JPEG
UPSC CSE 20KB - 100KB (signed 3 times) ~350 px wide 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, or the document kit for your exam (for example the SSC CGL kit or IBPS kit), which uses the exact size range for that exam.
  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: signatures are wide, not tall — for example 140×60 px for IBPS. 200×230 px is a photo size, not a signature size.
  • 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

Most exams also need a passport photo, with its own size limit (for example 200×230 px and 20–50KB for IBPS; SSC CGL 2026 captures the photo live instead). The exam document kits prepare the photo and signature together at the right sizes. 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.