How to Resize Signature for PAN Card / NSDL

One of the trickiest parts of applying for a PAN card online is getting the signature in the right format. The NSDL and UTIITSL portals require a signature in JPG format, maximum 10KB, with specific dimensions. This guide walks you through the entire process.

NSDL Signature Requirements

Step 1: Create Your Signature Image

You have two options to get your signature as an image file:

Option A: Using a Smartphone

1. Take a plain white A4 paper
2. Sign in the center using a black or blue ball pen
3. Place the paper on a flat surface with good lighting
4. Photograph just the signature — crop tightly around it in your phone's gallery app
5. Save as JPG

Option B: Using a Scanner

1. Sign on white paper
2. Scan at 100-200 DPI
3. Save as JPG (not PNG or TIFF)
4. Crop tightly to just the signature area

Step 2: Resize to 10KB Using RealImageTool

1. Open the Photo & Signature Resizer
2. Upload your signature image
3. Click the "10 KB" preset button
4. Click "Resize to Target KB"
5. Check the result — it should show "Result: ~9-10 KB"
6. Click "Download Result"

Tips for a Good Signature Image

• Use black ink: Black ink shows better contrast against white paper, resulting in a cleaner image even at 10KB.
• Clean background: Make sure the paper is clean with no smudges, lines, or ruled lines showing.
• Crop tight: Crop the image to show only the signature with a small white border. Extra white space wastes precious KB allowance.
• Not too small: The signature should still be legible at the NSDL portal's display size.
• Natural signature: Use your regular signature — the one on your bank documents. Forged-looking signatures may be flagged.

Why Is My Signature File Still Too Large?

If after resizing your file is still over 10KB, here are some things to try:

• Make sure you selected "JPG" output format, not PNG (PNG is larger)
• Crop the image more tightly around the signature before uploading
• Try entering 9 in the custom KB field to target exactly 9KB
• If the signature is on ruled paper, retake the photo on plain white paper