NDA & NA (All Categories) Signature Size
Requirements (2026)
Complete official signature specifications for National Defence Academy & Naval Academy 2026 application. Signatures that don't meet these rules will be rejected by the upload portal.
Official NDA Signature Specifications
| File Size | 20KB – 200KB |
| Format | JPEG / JPG |
| Ink Color | black |
| Paper | Plain white (no lines, no ruled paper) |
Additional Requirements
- MANDATORY: Image must contain EXACTLY THREE identical signatures signed vertically (one below the other).
- Must be signed on plain, unruled white paper using only BLACK ink.
Why Signatures Get Rejected on the NDA Portal
Signature exceeds 200KB
High-resolution phone scans often exceed 200KB. The portal blocks any file above this limit.
Wrong ink color used
NDA mandates black ink. Blue or pencil signatures are a common rejection reason.
Signed on lined or ruled paper
Notebook lines visible in the scan are treated as tampering. Always use plain, unruled white paper.
Frequently Asked Questions
What is the exact signature file size for NDA & NA (All Categories) 2026?
The official signature file size for NDA & NA (All Categories) is 20KB to 200KB in JPEG/JPG format.
What ink color is required for NDA signatures?
NDA requires signatures in black ink on plain white paper for the 2026 application process.
Can I use a digital signature for NDA & NA (All Categories)?
Most government exam portals do not accept digital signatures. You should sign on plain white paper with black ink, scan or photograph it, and then use our compressor to meet the exact size requirements.
Need to Compress Your Signature?
Our free tool automatically compresses your signature scan to meet the exact NDA 2026 specifications listed above.
Use NDA Signature Compressor