Skip to content

AIN Compressed Archive (.ain)

.ain file signature | application/octet-stream

AIN Compressed Archive

Safe

Magic Bytes

Offset 0
21 12

Sources: Gary Kessler

Extension

.ain

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .ain files in Python

Python 
def is_ain(file_path: str) -> bool:
    """Check if file is a valid AIN by magic bytes."""
    signature = bytes([0x21, 0x12])
    with open(file_path, "rb") as f:
        return f.read(2) == signature

How to validate .ain files in Node.js

Node.js 
function isAIN(buffer: Buffer): boolean {
  const signature = Buffer.from([0x21, 0x12]);
  return buffer.subarray(0, 2).equals(signature);
}

How to validate .ain files in Go

Go 
func IsAIN(data []byte) bool {
    signature := []byte{0x21, 0x12}
    if len(data) < 2 {
        return false
    }
    return bytes.Equal(data[:2], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .ain file?

A .ain file is a AIN Compressed Archive file. AIN Compressed Archive

What are the magic bytes for .ain files?

The magic bytes for AIN Compressed Archive files are 21 12 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ain file?

To validate a .ain file, read the first bytes of the file and compare them against the known magic bytes (21 12) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .ain files?

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

Is it safe to open .ain files?

AIN Compressed Archive (.ain) 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.