Fuzzy bitmap (.fbm)
.fbm file signature | application/octet-stream
Fuzzy bitmap (FBM) file
Magic Bytes
Offset 0
25 62 69 74 6D 61 70
Sources: Gary Kessler
Extension
.fbm
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .fbm files in Python
def is_fbm(file_path: str) -> bool:
"""Check if file is a valid FBM by magic bytes."""
signature = bytes([0x25, 0x62, 0x69, 0x74, 0x6D, 0x61, 0x70])
with open(file_path, "rb") as f:
return f.read(7) == signatureHow to validate .fbm files in Node.js
function isFBM(buffer: Buffer): boolean {
const signature = Buffer.from([0x25, 0x62, 0x69, 0x74, 0x6D, 0x61, 0x70]);
return buffer.subarray(0, 7).equals(signature);
}How to validate .fbm files in Go
func IsFBM(data []byte) bool {
signature := []byte{0x25, 0x62, 0x69, 0x74, 0x6D, 0x61, 0x70}
if len(data) < 7 {
return false
}
return bytes.Equal(data[:7], signature)
}API Endpoint
/api/v1/fbm
curl https://filesignature.org/api/v1/fbm
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .fbm file?
A .fbm file is a Fuzzy bitmap file. Fuzzy bitmap (FBM) file
What are the magic bytes for .fbm files?
The magic bytes for Fuzzy bitmap files are 25 62 69 74 6D 61 70 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .fbm file?
To validate a .fbm file, read the first bytes of the file and compare them against the known magic bytes (25 62 69 74 6D 61 70) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .fbm files?
There is no officially registered MIME type for .fbm files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .fbm files?
Fuzzy bitmap (.fbm) 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.