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Hamarsoft HAP 3 (.hap)

.hap file signature | application/octet-stream

Hamarsoft HAP 3.x compressed archive

Safe

Magic Bytes

Offset 0
91 33 48 46

Sources: Gary Kessler

Extension

.hap

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .hap files in Python

Python 
def is_hap(file_path: str) -> bool:
    """Check if file is a valid HAP by magic bytes."""
    signature = bytes([0x91, 0x33, 0x48, 0x46])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .hap files in Node.js

Node.js 
function isHAP(buffer: Buffer): boolean {
  const signature = Buffer.from([0x91, 0x33, 0x48, 0x46]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .hap files in Go

Go 
func IsHAP(data []byte) bool {
    signature := []byte{0x91, 0x33, 0x48, 0x46}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .hap file?

A .hap file is a Hamarsoft HAP 3 file. Hamarsoft HAP 3.x compressed archive

What are the magic bytes for .hap files?

The magic bytes for Hamarsoft HAP 3 files are 91 33 48 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .hap file?

To validate a .hap file, read the first bytes of the file and compare them against the known magic bytes (91 33 48 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .hap files?

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

Is it safe to open .hap files?

Hamarsoft HAP 3 (.hap) 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.