Skip to content

IDENTIFIER (.identifier)

.identifier file signature | application/octet-stream

Microsoft Zone Identifier for URL Security Zones[76][77]

Safe

Magic Bytes

Offset 0
5B 5A 6F 6E 65 54 72 61 6E 73 66 65 72 5D

Sources: Wikipedia

Extension

.identifier

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .identifier files in Python

Python 
def is_identifier(file_path: str) -> bool:
    """Check if file is a valid IDENTIFIER by magic bytes."""
    signature = bytes([0x5B, 0x5A, 0x6F, 0x6E, 0x65, 0x54, 0x72, 0x61, 0x6E, 0x73, 0x66, 0x65, 0x72, 0x5D])
    with open(file_path, "rb") as f:
        return f.read(14) == signature

How to validate .identifier files in Node.js

Node.js 
function isIDENTIFIER(buffer: Buffer): boolean {
  const signature = Buffer.from([0x5B, 0x5A, 0x6F, 0x6E, 0x65, 0x54, 0x72, 0x61, 0x6E, 0x73, 0x66, 0x65, 0x72, 0x5D]);
  return buffer.subarray(0, 14).equals(signature);
}

How to validate .identifier files in Go

Go 
func IsIDENTIFIER(data []byte) bool {
    signature := []byte{0x5B, 0x5A, 0x6F, 0x6E, 0x65, 0x54, 0x72, 0x61, 0x6E, 0x73, 0x66, 0x65, 0x72, 0x5D}
    if len(data) < 14 {
        return false
    }
    return bytes.Equal(data[:14], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .identifier file?

A .identifier file is a IDENTIFIER file. Microsoft Zone Identifier for URL Security Zones[76][77]

What are the magic bytes for .identifier files?

The magic bytes for IDENTIFIER files are 5B 5A 6F 6E 65 54 72 61 6E 73 66 65 72 5D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .identifier file?

To validate a .identifier file, read the first bytes of the file and compare them against the known magic bytes (5B 5A 6F 6E 65 54 72 61 6E 73 66 65 72 5D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .identifier files?

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

Is it safe to open .identifier files?

IDENTIFIER (.identifier) 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.