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GN Nettest WinPharoah filter file (.ftr)

.ftr file signature | application/octet-stream

GN Nettest WinPharoah filter file

Safe

Magic Bytes

Offset 0
D2 0A 00 00

Sources: Gary Kessler

Extension

.ftr

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .ftr files in Python

Python 
def is_ftr(file_path: str) -> bool:
    """Check if file is a valid FTR by magic bytes."""
    signature = bytes([0xD2, 0x0A, 0x00, 0x00])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .ftr files in Node.js

Node.js 
function isFTR(buffer: Buffer): boolean {
  const signature = Buffer.from([0xD2, 0x0A, 0x00, 0x00]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .ftr files in Go

Go 
func IsFTR(data []byte) bool {
    signature := []byte{0xD2, 0x0A, 0x00, 0x00}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

GET /api/v1/ftr
curl https://filesignature.org/api/v1/ftr

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .ftr file?

A .ftr file is a GN Nettest WinPharoah filter file file. GN Nettest WinPharoah filter file

What are the magic bytes for .ftr files?

The magic bytes for GN Nettest WinPharoah filter file files are D2 0A 00 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ftr file?

To validate a .ftr file, read the first bytes of the file and compare them against the known magic bytes (D2 0A 00 00) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .ftr files?

There is no officially registered MIME type for .ftr files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .ftr files?

GN Nettest WinPharoah filter file (.ftr) 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.