AFF (.aff)

.aff file signature | application/octet-stream

Advanced Forensics Format

Safe

Magic Bytes

Offset 0


              41 46 46

Sources: Wikipedia

Extension

.aff

MIME Type

application/octet-stream

Byte Offset

Risk Level

Safe

Validation Code

How to validate .aff files in Python

Python

def is_aff(file_path: str) -> bool:
    """Check if file is a valid AFF by magic bytes."""
    signature = bytes([0x41, 0x46, 0x46])
    with open(file_path, "rb") as f:
        return f.read(3) == signature

How to validate .aff files in Node.js

Node.js

function isAFF(buffer: Buffer): boolean {
  const signature = Buffer.from([0x41, 0x46, 0x46]);
  return buffer.subarray(0, 3).equals(signature);
}

How to validate .aff files in Go

func IsAFF(data []byte) bool {
    signature := []byte{0x41, 0x46, 0x46}
    if len(data) < 3 {
        return false
    }
    return bytes.Equal(data[:3], signature)
}

API Endpoint

GET /api/v1/aff


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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .aff file?

A .aff file is a AFF file. Advanced Forensics Format

What are the magic bytes for .aff files?

The magic bytes for AFF files are 41 46 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .aff file?

To validate a .aff file, read the first bytes of the file and compare them against the known magic bytes (41 46 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .aff files?

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

Is it safe to open .aff files?

AFF (.aff) 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.