QOI (.qoi)
.qoi file signature | application/octet-stream
QOI- The “Quite OK Image Format”[19]
Magic Bytes
Offset 0
71 6F 69 66
Sources: Wikipedia
Extension
.qoi
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .qoi files in Python
def is_qoi(file_path: str) -> bool:
"""Check if file is a valid QOI by magic bytes."""
signature = bytes([0x71, 0x6F, 0x69, 0x66])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .qoi files in Node.js
function isQOI(buffer: Buffer): boolean {
const signature = Buffer.from([0x71, 0x6F, 0x69, 0x66]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .qoi files in Go
func IsQOI(data []byte) bool {
signature := []byte{0x71, 0x6F, 0x69, 0x66}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/qoi
curl https://filesignature.org/api/v1/qoi
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .qoi file?
A .qoi file is a QOI file. QOI- The “Quite OK Image Format”[19]
What are the magic bytes for .qoi files?
The magic bytes for QOI files are 71 6F 69 66 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .qoi file?
To validate a .qoi file, read the first bytes of the file and compare them against the known magic bytes (71 6F 69 66) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .qoi files?
There is no officially registered MIME type for .qoi files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .qoi files?
QOI (.qoi) 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.