XSD (.xsd)

.xsd file signature | application/xml

Safe

Magic Bytes

Offset 0


              3C 3F 78 6D 6C

Sources: Apache Tika

All Known Signatures

6 signature variants are documented for .xsd files across multiple sources.

Hex Signature	Offset	Sources
3C 3F 78 6D 6C	0	Apache Tika
3C 3F 58 4D 4C	0	Apache Tika
EF BB BF 3C 3F 78 6D 6C	0	Apache Tika
FF FE 3C 00 3F 00 78 00 6D 00 6C 00	0	Apache Tika
FE FF 00 3C 00 3F 00 78 00 6D 00 6C	0	Apache Tika
3C 21 2D 2D	0	Apache Tika

Extension

.xsd

MIME Type

application/xml

Byte Offset

Risk Level

Safe

Validation Code

How to validate .xsd files in Python

Python

def is_xsd(file_path: str) -> bool:
    """Check if file is a valid XSD by magic bytes."""
    signature = bytes([0x3C, 0x3F, 0x78, 0x6D, 0x6C])
    with open(file_path, "rb") as f:
        return f.read(5) == signature

How to validate .xsd files in Node.js

Node.js

function isXSD(buffer: Buffer): boolean {
  const signature = Buffer.from([0x3C, 0x3F, 0x78, 0x6D, 0x6C]);
  return buffer.subarray(0, 5).equals(signature);
}

How to validate .xsd files in Go

func IsXSD(data []byte) bool {
    signature := []byte{0x3C, 0x3F, 0x78, 0x6D, 0x6C}
    if len(data) < 5 {
        return false
    }
    return bytes.Equal(data[:5], signature)
}

API Endpoint

GET /api/v1/xsd


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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .xsd file?

A .xsd file is a XSD file.

What are the magic bytes for .xsd files?

The magic bytes for XSD files are 3C 3F 78 6D 6C at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .xsd file?

To validate a .xsd file, read the first bytes of the file and compare them against the known magic bytes (3C 3F 78 6D 6C) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .xsd files?

The primary MIME type for .xsd files is application/xml.

Is it safe to open .xsd files?

XSD (.xsd) 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.