An Object Linking and Embedding (.wiz)
.wiz file signature | application/octet-stream
Magic Bytes
Offset: 0
CF FA ED FE
An Object Linking and Embedding (OLE) Compound File (CF) (i.e.,OLECF)file format, known asCompound Binary File formatby Microsoft, used byMicrosoft Office 97-2003 applications (Word, Powerpoint, Excel, Wizard). Part ofMicrosoft'sStructured Storage (MSS)architecture for Component Object Model (COM)-basedoperating systems.[See also Excel, Outlook, PowerPoint, and Word "subheaders" at byte offset 512 (0x200).]There appear to several subheader formats and a dearth of documentation.There have been re
Sources: Gary Kessler
All Known Signatures
2 signature variants are documented for .wiz files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| CF FA ED FE | 0 | Gary Kessler |
| D0 CF 11 E0 A1 B1 1A E1 | 0 | Gary Kessler |
Validation Code
How to validate .wiz files in Python
def is_wiz(file_path: str) -> bool:
"""Check if file is a valid WIZ by magic bytes."""
signature = bytes([0xCF, 0xFA, 0xED, 0xFE])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .wiz files in Node.js
function isWIZ(buffer: Buffer): boolean {
const signature = Buffer.from([0xCF, 0xFA, 0xED, 0xFE]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .wiz files in Go
func IsWIZ(data []byte) bool {
signature := []byte{0xCF, 0xFA, 0xED, 0xFE}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/wiz
curl https://filesignature.org/api/v1/wiz
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .wiz file?
A .wiz file is a An Object Linking and Embedding file. An Object Linking and Embedding (OLE) Compound File (CF) (i.e.,OLECF)file format, known asCompound Binary File formatby Microsoft, used byMicrosoft Office 97-2003 applications (Word, Powerpoint, Excel, Wizard). Part ofMicrosoft'sStructured Storage (MSS)architecture for Component Object Model (COM)-basedoperating systems.[See also Excel, Outlook, PowerPoint, and Word "subheaders" at byte offset 512 (0x200).]There appear to several subheader formats and a dearth of documentation.There have been re
What are the magic bytes for .wiz files?
The magic bytes for An Object Linking and Embedding files are CF FA ED FE at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .wiz file?
To validate a .wiz file, read the first bytes of the file and compare them against the known magic bytes (CF FA ED FE) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .wiz files?
There is no officially registered MIME type for .wiz files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .wiz files?
An Object Linking and Embedding (.wiz) 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.