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ADXlossy compressed audio file (.adx)

.adx file signature | application/octet-stream

ADXlossy compressed audio file

Safe

Magic Bytes

Offset 0
03 00 00 00 41 50 50 52

Sources: Wikipedia, Gary Kessler

All Known Signatures

2 signature variants are documented for .adx files across multiple sources.

Hex Signature Offset Sources
03 00 00 00 41 50 50 52 0 Wikipedia, Gary Kessler
80 00 0 Gary Kessler

Extension

.adx

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .adx files in Python

Python
def is_adx(file_path: str) -> bool:
    """Check if file is a valid ADX by magic bytes."""
    signature = bytes([0x03, 0x00, 0x00, 0x00, 0x41, 0x50, 0x50, 0x52])
    with open(file_path, "rb") as f:
        return f.read(8) == signature

How to validate .adx files in Node.js

Node.js
function isADX(buffer: Buffer): boolean {
  const signature = Buffer.from([0x03, 0x00, 0x00, 0x00, 0x41, 0x50, 0x50, 0x52]);
  return buffer.subarray(0, 8).equals(signature);
}

How to validate .adx files in Go

Go
func IsADX(data []byte) bool {
    signature := []byte{0x03, 0x00, 0x00, 0x00, 0x41, 0x50, 0x50, 0x52}
    if len(data) < 8 {
        return false
    }
    return bytes.Equal(data[:8], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .adx file?

A .adx file is a ADXlossy compressed audio file file. ADXlossy compressed audio file

What are the magic bytes for .adx files?

The magic bytes for ADXlossy compressed audio file files are 03 00 00 00 41 50 50 52 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .adx file?

To validate a .adx file, read the first bytes of the file and compare them against the known magic bytes (03 00 00 00 41 50 50 52) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .adx files?

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

Is it safe to open .adx files?

ADXlossy compressed audio file (.adx) 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.