NSDL PAN Signature Resizer Online Free: Fix 4.5×2 cm, 200 DPI, 10-50 KB Upload Error 2026

Applying for a Protean (NSDL) PAN card requires a signature that meets strict digital standards. If your signature is getting rejected with errors like “Invalid Dimension”, “Low Resolution”, or “File Size Mismatch”, it’s because the scan doesn’t match the required 4.5 cm Width × 2 cm Height, 200 DPI, and 10KB–50KB file size.

Our NSDL PAN Signature Resizer is a free online tool built specifically to fix these issues instantly for the Protean (NSDL) portal in 2026.

Why NSDL PAN Signature Gets Rejected (Common Errors 2026)

Signature rejection is one of the top reasons for PAN application delays. Here are the main problems applicants face:

Resolution (DPI) Failure: Most phone cameras or scanners save at 72–150 DPI. NSDL requires **200 DPI**. Without this, the signature appears pixelated or invalid on the system.
File Size Too Low: Signatures usually have lots of white space, resulting in very small files (2–8 KB). NSDL rejects anything below **10 KB** to ensure ink density and print quality.
Dimension & Orientation Mismatch: NSDL wants a **horizontal signature** (4.5 cm width × 2 cm height). Vertical or square scans get rejected immediately.
Color & Background Issues: Blue ink, colored paper, or low contrast scans are auto-rejected. Black ink on plain white is mandatory.

The Solution: NSDL Signature Resizer with 200 DPI & Size Fix

This tool is not just a cropper — it’s optimized for the **Protean NSDL signature requirements** with these powerful features:

Exact 200 DPI Calibration: Automatically resizes to **354 × 157 pixels** (4.5 cm width × 2 cm height @ 200 DPI) to pass NSDL metadata check.
Smart File Size Boost: If your file is under 10 KB, the tool safely increases JPG size to **15–35 KB** range without quality loss — no more “too small” error.
Locked 4.5×2 Ratio Crop: Crop box is fixed to the official **horizontal 4.5 cm × 2 cm** ratio so your signature fits perfectly.
Black Ink Optimization: Enhances contrast for black ink scans, making sure NSDL OCR reads it clearly.

NSDL PAN Signature Specs Checklist (2026)

Specification	Official Requirement
Physical Dimensions	4.5 cm (Width) × 2.0 cm (Height)
Digital Pixels	354 × 157 px (at 200 DPI)
File Size	10 KB to 50 KB
Ink & Color	Black Ink Only, High Contrast
Background	Plain White (No Lines/Grids)
Format	JPEG, PNG, GIF

Step-by-Step: How to Resize Signature for NSDL PAN Card 2026

Sign Clearly: Use a black ballpoint pen on clean white paper. Avoid lined or colored sheets.
Scan or Photograph: Take a straight, well-lit top-down photo or scan. No shadows or tilt.
Upload: Click the upload zone in the tool above and select your signature image.
Crop: Adjust your signature inside the fixed 4.5×2 cm ratio box.
Generate & Download: Click “Generate PAN Signature” — file will auto-resize to 10–50 KB and 200 DPI. Download and upload to NSDL portal.

Pro Tip: Always fix your photo first! Use our NSDL PAN Photo Resizer to prepare the 3.5×2.5 cm photo with 200 DPI and correct size.

Frequently Asked Questions (FAQ) – NSDL PAN Signature Resizer 2026

Can I use blue ink for NSDL PAN signature?

Blue ink is not recommended for online NSDL applications. Black ink provides better contrast and is preferred to avoid rejection. Our tool optimizes for black ink scans.

My signature file is only 5KB – will NSDL accept it?

No, files below 10KB are often rejected as “low quality”. Our tool automatically increases the file size to 15–35 KB safely using JPG compression tuning.

Why does NSDL show “Invalid DPI” for signature?

Most scans are 72–150 DPI. NSDL requires 200 DPI. Our resizer forces 354×157 pixels at 200 DPI to pass the metadata check instantly.

Does NSDL accept PNG or GIF for signature?

Yes, NSDL accepts JPEG, PNG, and GIF. Our tool outputs optimized JPEG for best compatibility and size control (10–50 KB).

How to make signature horizontal for NSDL?

Use our tool — the crop box is locked to 4.5 cm width × 2 cm height ratio, ensuring perfect horizontal orientation every time.