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Harvard Graphics presentation file (.sh3)

.sh3 file signature | application/octet-stream

Harvard Graphics presentation file

Safe

Magic Bytes

Offset 0
48 48 47 42 31

Sources: Gary Kessler

Extension

.sh3

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .sh3 files in Python

Python 
def is_sh3(file_path: str) -> bool:
    """Check if file is a valid SH3 by magic bytes."""
    signature = bytes([0x48, 0x48, 0x47, 0x42, 0x31])
    with open(file_path, "rb") as f:
        return f.read(5) == signature

How to validate .sh3 files in Node.js

Node.js 
function isSH3(buffer: Buffer): boolean {
  const signature = Buffer.from([0x48, 0x48, 0x47, 0x42, 0x31]);
  return buffer.subarray(0, 5).equals(signature);
}

How to validate .sh3 files in Go

Go 
func IsSH3(data []byte) bool {
    signature := []byte{0x48, 0x48, 0x47, 0x42, 0x31}
    if len(data) < 5 {
        return false
    }
    return bytes.Equal(data[:5], signature)
}

API Endpoint

GET /api/v1/sh3
curl https://filesignature.org/api/v1/sh3

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .sh3 file?

A .sh3 file is a Harvard Graphics presentation file file. Harvard Graphics presentation file

What are the magic bytes for .sh3 files?

The magic bytes for Harvard Graphics presentation file files are 48 48 47 42 31 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .sh3 file?

To validate a .sh3 file, read the first bytes of the file and compare them against the known magic bytes (48 48 47 42 31) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .sh3 files?

There is no officially registered MIME type for .sh3 files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .sh3 files?

Harvard Graphics presentation file (.sh3) 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.