CZX magic bytes (.czx)
.czx file signature: 43 5A 50 58 | application/octet-stream
CZX is an encrypted archive format associated with Czip and maintained within its original software ecosystem. It is used to package files into protected archives for storage and transfer, particularly where access control or confidentiality is required. The format is generally considered safe, though like other archives it should be opened with trusted software because malformed or malicious archives can still exploit vulnerabilities in decompressors.
Magic Bytes
Offset 0
43 5A 50 58
Sources: Wikipedia
Validation Code
How to validate .czx files in Python
def is_czx(file_path: str) -> bool:
"""Check if file is a valid CZX by magic bytes."""
signature = bytes([0x43, 0x5A, 0x50, 0x58])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .czx files in Node.js
function isCZX(buffer: Buffer): boolean {
const signature = Buffer.from([0x43, 0x5A, 0x50, 0x58]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .czx files in Go
func IsCZX(data []byte) bool {
signature := []byte{0x43, 0x5A, 0x50, 0x58}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/czx
curl https://filesignature.org/api/v1/czx
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .czx file?
A .czx file is identified by the magic bytes 43 5A 50 58 at byte offset 0. CZX is an encrypted archive format associated with Czip and maintained within its original software ecosystem. It is used to package files into protected archives for storage and transfer, particularly where access control or confidentiality is required. The format is generally considered safe, though like other archives it should be opened with trusted software because malformed or malicious archives can still exploit vulnerabilities in decompressors.
What are the magic bytes for .czx files?
The magic bytes for CZX (.czx) files are 43 5A 50 58 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .czx file?
To validate a .czx file, read the first bytes of the file and compare them against the known magic bytes (43 5A 50 58) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .czx files?
There is no officially registered MIME type for .czx files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .czx files?
CZX (.czx) 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.