H5 (.h5)
.h5 file signature | application/x-hdf
Hierarchical Data Format version 5 (HDF5) is a file format developed and maintained by The HDF Group for storing large, complex scientific data sets. It is commonly used in research, engineering, and data analysis applications for multidimensional arrays, metadata, and structured numeric data. HDF5 is generally safe to open, though files from untrusted sources may contain very large datasets that can affect performance or resource usage.
Magic Bytes
Offset 0
0E 03 13 01
Sources: Apache Tika
All Known Signatures
3 signature variants are documented for .h5 files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 0E 03 13 01 | 0 | Apache Tika |
| 89 48 44 46 0D 0A 1A | 0 | Apache Tika |
| 89 48 44 46 0D 0A 1A 0A | 0 | Wikipedia |
Extension
.h5
MIME Type
application/x-hdf
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .h5 files in Python
def is_h5(file_path: str) -> bool:
"""Check if file is a valid H5 by magic bytes."""
signature = bytes([0x0E, 0x03, 0x13, 0x01])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .h5 files in Node.js
function isH5(buffer: Buffer): boolean {
const signature = Buffer.from([0x0E, 0x03, 0x13, 0x01]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .h5 files in Go
func IsH5(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/h5
curl https://filesignature.org/api/v1/h5
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .h5 file?
A .h5 file is identified by the magic bytes 0E 03 13 01 at byte offset 0. Hierarchical Data Format version 5 (HDF5) is a file format developed and maintained by The HDF Group for storing large, complex scientific data sets. It is commonly used in research, engineering, and data analysis applications for multidimensional arrays, metadata, and structured numeric data. HDF5 is generally safe to open, though files from untrusted sources may contain very large datasets that can affect performance or resource usage.
What are the magic bytes for .h5 files?
The magic bytes for H5 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 .h5 file?
To validate a .h5 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 .h5 files?
The primary MIME type for .h5 files is application/x-hdf.
Is it safe to open .h5 files?
H5 (.h5) 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.