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WCM (.wcm)

.wcm file signature | application/vnd.ms-works

Safe

Magic Bytes

Offset 0
D0 CF 11 E0 A1 B1 1A E1

Sources: Apache Tika

Extension

.wcm

MIME Type

application/vnd.ms-works

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .wcm files in Python

Python 
def is_wcm(file_path: str) -> bool:
    """Check if file is a valid WCM by magic bytes."""
    signature = bytes([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1])
    with open(file_path, "rb") as f:
        return f.read(8) == signature

How to validate .wcm files in Node.js

Node.js 
function isWCM(buffer: Buffer): boolean {
  const signature = Buffer.from([0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]);
  return buffer.subarray(0, 8).equals(signature);
}

How to validate .wcm files in Go

Go 
func IsWCM(data []byte) bool {
    signature := []byte{0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1}
    if len(data) < 8 {
        return false
    }
    return bytes.Equal(data[:8], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .wcm file?

A .wcm file is a WCM file.

What are the magic bytes for .wcm files?

The magic bytes for WCM files are D0 CF 11 E0 A1 B1 1A E1 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .wcm file?

To validate a .wcm file, read the first bytes of the file and compare them against the known magic bytes (D0 CF 11 E0 A1 B1 1A E1) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .wcm files?

The primary MIME type for .wcm files is application/vnd.ms-works.

Is it safe to open .wcm files?

WCM (.wcm) 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.