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VSDX (.vsdx)

.vsdx file signature | application/octet-stream

zip file formatand formats based on it, such asEPUB,JAR,ODF,OOXML

Safe

Magic Bytes

Offset 0
50 4B 03 04 50 4B 05 06 50 4B 07 08

Sources: Wikipedia

Extension

.vsdx

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .vsdx files in Python

Python 
def is_vsdx(file_path: str) -> bool:
    """Check if file is a valid VSDX by magic bytes."""
    signature = bytes([0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08])
    with open(file_path, "rb") as f:
        return f.read(12) == signature

How to validate .vsdx files in Node.js

Node.js 
function isVSDX(buffer: Buffer): boolean {
  const signature = Buffer.from([0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08]);
  return buffer.subarray(0, 12).equals(signature);
}

How to validate .vsdx files in Go

Go 
func IsVSDX(data []byte) bool {
    signature := []byte{0x50, 0x4B, 0x03, 0x04, 0x50, 0x4B, 0x05, 0x06, 0x50, 0x4B, 0x07, 0x08}
    if len(data) < 12 {
        return false
    }
    return bytes.Equal(data[:12], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .vsdx file?

A .vsdx file is a VSDX file. zip file formatand formats based on it, such asEPUB,JAR,ODF,OOXML

What are the magic bytes for .vsdx files?

The magic bytes for VSDX files are 50 4B 03 04 50 4B 05 06 50 4B 07 08 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .vsdx file?

To validate a .vsdx file, read the first bytes of the file and compare them against the known magic bytes (50 4B 03 04 50 4B 05 06 50 4B 07 08) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .vsdx files?

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

Is it safe to open .vsdx files?

VSDX (.vsdx) 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.