Windows (.dib)
.dib file signature | image/bmp
Device-independent bitmap (DIB) is a raster image format developed by Microsoft for the Windows operating system and maintained as part of the Windows graphics ecosystem. It is used for storing and exchanging bitmap images in applications that support Windows imaging, including editors, viewers, and software components that handle clipboard or icon data. DIB is a legacy format with limited compression and metadata support, but it is generally safe when opened in standard image software.
Magic Bytes
Offset 0
42 4D
Sources: Apache Tika, Wikipedia, Gary Kessler
Extension
.dib
MIME Type
image/bmp
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .dib files in Python
def is_dib(file_path: str) -> bool:
"""Check if file is a valid DIB by magic bytes."""
signature = bytes([0x42, 0x4D])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .dib files in Node.js
function isDIB(buffer: Buffer): boolean {
const signature = Buffer.from([0x42, 0x4D]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .dib files in Go
func IsDIB(data []byte) bool {
signature := []byte{0x42, 0x4D}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/dib
curl https://filesignature.org/api/v1/dib
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .dib file?
A .dib file is a Windows file. Device-independent bitmap (DIB) is a raster image format developed by Microsoft for the Windows operating system and maintained as part of the Windows graphics ecosystem. It is used for storing and exchanging bitmap images in applications that support Windows imaging, including editors, viewers, and software components that handle clipboard or icon data. DIB is a legacy format with limited compression and metadata support, but it is generally safe when opened in standard image software.
What are the magic bytes for .dib files?
The magic bytes for Windows files are 42 4D at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .dib file?
To validate a .dib file, read the first bytes of the file and compare them against the known magic bytes (42 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 .dib files?
The primary MIME type for .dib files is image/bmp.
Is it safe to open .dib files?
Windows (.dib) 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.