E57 (.e57)
.e57 file signature | model/e57
ASTM E57 3D file format
Magic Bytes
Offset 0
41 53 54 4D 2D 45 35 37
Sources: Apache Tika, Wikipedia
Extension
.e57
MIME Type
model/e57
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .e57 files in Python
def is_e57(file_path: str) -> bool:
"""Check if file is a valid E57 by magic bytes."""
signature = bytes([0x41, 0x53, 0x54, 0x4D, 0x2D, 0x45, 0x35, 0x37])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .e57 files in Node.js
function isE57(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x53, 0x54, 0x4D, 0x2D, 0x45, 0x35, 0x37]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .e57 files in Go
func IsE57(data []byte) bool {
signature := []byte{0x41, 0x53, 0x54, 0x4D, 0x2D, 0x45, 0x35, 0x37}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/e57
curl https://filesignature.org/api/v1/e57
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .e57 file?
A .e57 file is a E57 file. ASTM E57 3D file format
What are the magic bytes for .e57 files?
The magic bytes for E57 files are 41 53 54 4D 2D 45 35 37 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .e57 file?
To validate a .e57 file, read the first bytes of the file and compare them against the known magic bytes (41 53 54 4D 2D 45 35 37) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .e57 files?
The primary MIME type for .e57 files is model/e57.
Is it safe to open .e57 files?
E57 (.e57) 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.