LZ4
application/x-lz4
Magic Bytes
Offset: 0
18 4D 22 04
LZ4 is a lossless data compression algorithm and file format developed by Yann Collet, specifically designed to prioritize compression and decompression speed. It is extensively utilized in operating system kernels, filesystem compression, real-time data streaming, and high-performance computing scenarios where throughput is critical. As an open-source standard widely adopted within the Linux ecosystem, the format is considered safe and stable for general use without specific security vulnerabilities.
Validation Code
How to validate .lz4 files in Python
Python
def is_lz4(file_path: str) -> bool:
"""Check if file is a valid LZ4 by magic bytes."""
signature = bytes([0x18, 0x4D, 0x22, 0x04])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .lz4 files in Node.js
Node.js
function isLZ4(buffer: Buffer): boolean {
const signature = Buffer.from([0x18, 0x4D, 0x22, 0x04]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsLZ4(data []byte) bool {
signature := []byte{0x18, 0x4D, 0x22, 0x04}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/lz4
curl https://filesignature.org/api/v1/lz4