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AMFM (.amfm)

.amfm file signature | application/x-font-adobe-metric

Safe

Magic Bytes

Offset 0
53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73

Sources: Apache Tika

Extension

.amfm

MIME Type

application/x-font-adobe-metric

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .amfm files in Python

Python 
def is_amfm(file_path: str) -> bool:
    """Check if file is a valid AMFM by magic bytes."""
    signature = bytes([0x53, 0x74, 0x61, 0x72, 0x74, 0x46, 0x6F, 0x6E, 0x74, 0x4D, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73])
    with open(file_path, "rb") as f:
        return f.read(16) == signature

How to validate .amfm files in Node.js

Node.js 
function isAMFM(buffer: Buffer): boolean {
  const signature = Buffer.from([0x53, 0x74, 0x61, 0x72, 0x74, 0x46, 0x6F, 0x6E, 0x74, 0x4D, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73]);
  return buffer.subarray(0, 16).equals(signature);
}

How to validate .amfm files in Go

Go 
func IsAMFM(data []byte) bool {
    signature := []byte{0x53, 0x74, 0x61, 0x72, 0x74, 0x46, 0x6F, 0x6E, 0x74, 0x4D, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73}
    if len(data) < 16 {
        return false
    }
    return bytes.Equal(data[:16], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .amfm file?

A .amfm file is a AMFM file.

What are the magic bytes for .amfm files?

The magic bytes for AMFM files are 53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .amfm file?

To validate a .amfm file, read the first bytes of the file and compare them against the known magic bytes (53 74 61 72 74 46 6F 6E 74 4D 65 74 72 69 63 73) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .amfm files?

The primary MIME type for .amfm files is application/x-font-adobe-metric.

Is it safe to open .amfm files?

AMFM (.amfm) 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.