LZFSE (.lzfse)
.lzfse file signature | application/octet-stream
LZFSE is a lossless data compression format and algorithm developed by Apple and maintained as part of its open-source software efforts. It is used to reduce the size of files and data streams in applications, storage systems, and software distribution workflows where efficient compression and fast decompression are required. The format is not considered obsolete; as with any compressed data, files should be handled carefully because malformed archives can cause errors in decompression tools.
Magic Bytes
Offset 0
62 76 78 32
Sources: Wikipedia
Extension
.lzfse
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .lzfse files in Python
def is_lzfse(file_path: str) -> bool:
"""Check if file is a valid LZFSE by magic bytes."""
signature = bytes([0x62, 0x76, 0x78, 0x32])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .lzfse files in Node.js
function isLZFSE(buffer: Buffer): boolean {
const signature = Buffer.from([0x62, 0x76, 0x78, 0x32]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .lzfse files in Go
func IsLZFSE(data []byte) bool {
signature := []byte{0x62, 0x76, 0x78, 0x32}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/lzfse
curl https://filesignature.org/api/v1/lzfse
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .lzfse file?
A .lzfse file is identified by the magic bytes 62 76 78 32 at byte offset 0. LZFSE is a lossless data compression format and algorithm developed by Apple and maintained as part of its open-source software efforts. It is used to reduce the size of files and data streams in applications, storage systems, and software distribution workflows where efficient compression and fast decompression are required. The format is not considered obsolete; as with any compressed data, files should be handled carefully because malformed archives can cause errors in decompression tools.
What are the magic bytes for .lzfse files?
The magic bytes for LZFSE files are 62 76 78 32 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .lzfse file?
To validate a .lzfse file, read the first bytes of the file and compare them against the known magic bytes (62 76 78 32) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .lzfse files?
There is no officially registered MIME type for .lzfse files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .lzfse files?
LZFSE (.lzfse) 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.