SYM (.sym)
.sym file signature | application/octet-stream
(Unconfirmed file type. Likely type is Harvard GraphicsVersion 2.x graphic symbol or Windows SDK graphic symbol)
Magic Bytes
Offset 0
53 5A 20 88 F0 27 33 D1
Sources: Gary Kessler
All Known Signatures
3 signature variants are documented for .sym files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 53 5A 20 88 F0 27 33 D1 | 0 | Gary Kessler |
| 53 5A 44 44 88 F0 27 33 | 0 | Gary Kessler |
| 53 6D 62 6C | 0 | Gary Kessler |
Extension
.sym
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .sym files in Python
def is_sym(file_path: str) -> bool:
"""Check if file is a valid SYM by magic bytes."""
signature = bytes([0x53, 0x5A, 0x20, 0x88, 0xF0, 0x27, 0x33, 0xD1])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .sym files in Node.js
function isSYM(buffer: Buffer): boolean {
const signature = Buffer.from([0x53, 0x5A, 0x20, 0x88, 0xF0, 0x27, 0x33, 0xD1]);
return buffer.subarray(0, 8).equals(signature);
}How to validate .sym files in Go
func IsSYM(data []byte) bool {
signature := []byte{0x53, 0x5A, 0x20, 0x88, 0xF0, 0x27, 0x33, 0xD1}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
/api/v1/sym
curl https://filesignature.org/api/v1/sym
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .sym file?
A .sym file is a SYM file. (Unconfirmed file type. Likely type is Harvard GraphicsVersion 2.x graphic symbol or Windows SDK graphic symbol)
What are the magic bytes for .sym files?
The magic bytes for SYM files are 53 5A 20 88 F0 27 33 D1 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .sym file?
To validate a .sym file, read the first bytes of the file and compare them against the known magic bytes (53 5A 20 88 F0 27 33 D1) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .sym files?
There is no officially registered MIME type for .sym files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .sym files?
SYM (.sym) 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.