ILBM (.ilbm)
.ilbm file signature | application/octet-stream
Interleaved Bitmap (ILBM) is an image file format defined as part of the Interchange File Format (IFF) standard, originally developed by Electronic Arts and Commodore International. It was used for graphics on Amiga systems, including computer art, game assets, and animation work, and is still encountered in archives and legacy media collections. ILBM is a legacy format, and while generally safe, some modern software may not support all variants correctly.
Magic Bytes
Offset 0
46 4F 52 4D
Sources: Wikipedia
All Known Signatures
2 signature variants are documented for .ilbm files across multiple sources.
Extension
.ilbm
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .ilbm files in Python
def is_ilbm(file_path: str) -> bool:
"""Check if file is a valid ILBM by magic bytes."""
signature = bytes([0x46, 0x4F, 0x52, 0x4D])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .ilbm files in Node.js
function isILBM(buffer: Buffer): boolean {
const signature = Buffer.from([0x46, 0x4F, 0x52, 0x4D]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .ilbm files in Go
func IsILBM(data []byte) bool {
signature := []byte{0x46, 0x4F, 0x52, 0x4D}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/ilbm
curl https://filesignature.org/api/v1/ilbm
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .ilbm file?
A .ilbm file is identified by the magic bytes 46 4F 52 4D at byte offset 0. Interleaved Bitmap (ILBM) is an image file format defined as part of the Interchange File Format (IFF) standard, originally developed by Electronic Arts and Commodore International. It was used for graphics on Amiga systems, including computer art, game assets, and animation work, and is still encountered in archives and legacy media collections. ILBM is a legacy format, and while generally safe, some modern software may not support all variants correctly.
What are the magic bytes for .ilbm files?
The magic bytes for ILBM files are 46 4F 52 4D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .ilbm file?
To validate a .ilbm file, read the first bytes of the file and compare them against the known magic bytes (46 4F 52 4D) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .ilbm files?
There is no officially registered MIME type for .ilbm files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .ilbm files?
ILBM (.ilbm) 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.