National Imagery Transmission Format (.ntf)

.ntf file signature | image/nitf

National Imagery Transmission Format (NITF) file

Safe

Magic Bytes

Offset 0


              4E 49 54 46 30 31 2E 31 30

Sources: Apache Tika

All Known Signatures

6 signature variants are documented for .ntf files across multiple sources.

Hex Signature	Offset	Sources
4E 49 54 46 30 31 2E 31 30	0	Apache Tika
4E 49 54 46 30 32 2E 30 30 30	0	Apache Tika
4E 49 54 46 30 32 2E 31 30 30	0	Apache Tika
1A 00 00	0	Gary Kessler
30 31 4F 52 44 4E 41 4E 43 45 20 53 55 52 56 45 59 20 20 20 20 20 20 20	0	Gary Kessler
4E 49 54 46 30	0	Gary Kessler

Extension

.ntf

MIME Type

image/nitf

Byte Offset

Risk Level

Safe

Validation Code

How to validate .ntf files in Python

Python

def is_ntf(file_path: str) -> bool:
    """Check if file is a valid NTF by magic bytes."""
    signature = bytes([0x4E, 0x49, 0x54, 0x46, 0x30, 0x31, 0x2E, 0x31, 0x30])
    with open(file_path, "rb") as f:
        return f.read(9) == signature

How to validate .ntf files in Node.js

Node.js

function isNTF(buffer: Buffer): boolean {
  const signature = Buffer.from([0x4E, 0x49, 0x54, 0x46, 0x30, 0x31, 0x2E, 0x31, 0x30]);
  return buffer.subarray(0, 9).equals(signature);
}

How to validate .ntf files in Go

func IsNTF(data []byte) bool {
    signature := []byte{0x4E, 0x49, 0x54, 0x46, 0x30, 0x31, 0x2E, 0x31, 0x30}
    if len(data) < 9 {
        return false
    }
    return bytes.Equal(data[:9], signature)
}

API Endpoint

GET /api/v1/ntf


              curl https://filesignature.org/api/v1/ntf

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .ntf file?

A .ntf file is a National Imagery Transmission Format file. National Imagery Transmission Format (NITF) file

What are the magic bytes for .ntf files?

The magic bytes for National Imagery Transmission Format files are 4E 49 54 46 30 31 2E 31 30 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ntf file?

To validate a .ntf file, read the first bytes of the file and compare them against the known magic bytes (4E 49 54 46 30 31 2E 31 30) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .ntf files?

The primary MIME type for .ntf files is image/nitf.

Is it safe to open .ntf files?

National Imagery Transmission Format (.ntf) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.