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LAZ (.laz)

.laz file signature | application/x-asprs

Safe

Magic Bytes

Offset 0
4C 41 53 46

Sources: Apache Tika

Extension

.laz

MIME Type

application/x-asprs

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .laz files in Python

Python 
def is_laz(file_path: str) -> bool:
    """Check if file is a valid LAZ by magic bytes."""
    signature = bytes([0x4C, 0x41, 0x53, 0x46])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .laz files in Node.js

Node.js 
function isLAZ(buffer: Buffer): boolean {
  const signature = Buffer.from([0x4C, 0x41, 0x53, 0x46]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .laz files in Go

Go 
func IsLAZ(data []byte) bool {
    signature := []byte{0x4C, 0x41, 0x53, 0x46}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .laz file?

A .laz file is a LAZ file.

What are the magic bytes for .laz files?

The magic bytes for LAZ files are 4C 41 53 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .laz file?

To validate a .laz file, read the first bytes of the file and compare them against the known magic bytes (4C 41 53 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .laz files?

The primary MIME type for .laz files is application/x-asprs.

Is it safe to open .laz files?

LAZ (.laz) 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.