HDF4 (.hdf4)
.hdf4 file signature | application/octet-stream
Data stored in version 4 of theHierarchical Data Format.
Magic Bytes
Offset 0
0E 03 13 01
Sources: Wikipedia
Extension
.hdf4
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .hdf4 files in Python
def is_hdf4(file_path: str) -> bool:
"""Check if file is a valid HDF4 by magic bytes."""
signature = bytes([0x0E, 0x03, 0x13, 0x01])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .hdf4 files in Node.js
function isHDF4(buffer: Buffer): boolean {
const signature = Buffer.from([0x0E, 0x03, 0x13, 0x01]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .hdf4 files in Go
func IsHDF4(data []byte) bool {
signature := []byte{0x0E, 0x03, 0x13, 0x01}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/hdf4
curl https://filesignature.org/api/v1/hdf4
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .hdf4 file?
A .hdf4 file is a HDF4 file. Data stored in version 4 of theHierarchical Data Format.
What are the magic bytes for .hdf4 files?
The magic bytes for HDF4 files are 0E 03 13 01 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .hdf4 file?
To validate a .hdf4 file, read the first bytes of the file and compare them against the known magic bytes (0E 03 13 01) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .hdf4 files?
There is no officially registered MIME type for .hdf4 files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .hdf4 files?
HDF4 (.hdf4) 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.