ORC (.orc)
.orc file signature | application/octet-stream
Apache ORC(Optimized Row Columnar) file format
Magic Bytes
Offset 0
4F 52 43
Sources: Wikipedia
Extension
.orc
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .orc files in Python
def is_orc(file_path: str) -> bool:
"""Check if file is a valid ORC by magic bytes."""
signature = bytes([0x4F, 0x52, 0x43])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .orc files in Node.js
function isORC(buffer: Buffer): boolean {
const signature = Buffer.from([0x4F, 0x52, 0x43]);
return buffer.subarray(0, 3).equals(signature);
}How to validate .orc files in Go
func IsORC(data []byte) bool {
signature := []byte{0x4F, 0x52, 0x43}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
/api/v1/orc
curl https://filesignature.org/api/v1/orc
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .orc file?
A .orc file is a ORC file. Apache ORC(Optimized Row Columnar) file format
What are the magic bytes for .orc files?
The magic bytes for ORC files are 4F 52 43 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .orc file?
To validate a .orc file, read the first bytes of the file and compare them against the known magic bytes (4F 52 43) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .orc files?
There is no officially registered MIME type for .orc files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .orc files?
ORC (.orc) 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.