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SWM (.swm)

.swm file signature | application/octet-stream

Windows Imaging Formatfile

Safe

Magic Bytes

Offset 0
4D 53 57 49 4D 00 00 00 D0 00 00 00 00

Sources: Wikipedia

Extension

.swm

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .swm files in Python

Python 
def is_swm(file_path: str) -> bool:
    """Check if file is a valid SWM by magic bytes."""
    signature = bytes([0x4D, 0x53, 0x57, 0x49, 0x4D, 0x00, 0x00, 0x00, 0xD0, 0x00, 0x00, 0x00, 0x00])
    with open(file_path, "rb") as f:
        return f.read(13) == signature

How to validate .swm files in Node.js

Node.js 
function isSWM(buffer: Buffer): boolean {
  const signature = Buffer.from([0x4D, 0x53, 0x57, 0x49, 0x4D, 0x00, 0x00, 0x00, 0xD0, 0x00, 0x00, 0x00, 0x00]);
  return buffer.subarray(0, 13).equals(signature);
}

How to validate .swm files in Go

Go 
func IsSWM(data []byte) bool {
    signature := []byte{0x4D, 0x53, 0x57, 0x49, 0x4D, 0x00, 0x00, 0x00, 0xD0, 0x00, 0x00, 0x00, 0x00}
    if len(data) < 13 {
        return false
    }
    return bytes.Equal(data[:13], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .swm file?

A .swm file is a SWM file. Windows Imaging Formatfile

What are the magic bytes for .swm files?

The magic bytes for SWM files are 4D 53 57 49 4D 00 00 00 D0 00 00 00 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .swm file?

To validate a .swm file, read the first bytes of the file and compare them against the known magic bytes (4D 53 57 49 4D 00 00 00 D0 00 00 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 .swm files?

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

Is it safe to open .swm files?

SWM (.swm) 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.