Skip to content

TOAST (.toast)

.toast file signature | application/x-roxio-toast

TOAST is a disc image file format created for Roxio Toast, a macOS optical disc authoring application originally developed by Adaptec and later maintained by Roxio and Corel. It is used to store CD, DVD, and related disc contents for burning, duplication, and archival workflows in Toast and compatible imaging tools. The format is generally safe, though as with any disk image, files from untrusted sources should be handled cautiously.

Safe

Magic Bytes

Offset 0
45 52 02 00 00 00

Sources: Wikipedia

Extension

.toast

MIME Type

application/x-roxio-toast

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .toast files in Python

Python 
def is_toast(file_path: str) -> bool:
    """Check if file is a valid TOAST by magic bytes."""
    signature = bytes([0x45, 0x52, 0x02, 0x00, 0x00, 0x00])
    with open(file_path, "rb") as f:
        return f.read(6) == signature

How to validate .toast files in Node.js

Node.js 
function isTOAST(buffer: Buffer): boolean {
  const signature = Buffer.from([0x45, 0x52, 0x02, 0x00, 0x00, 0x00]);
  return buffer.subarray(0, 6).equals(signature);
}

How to validate .toast files in Go

Go 
func IsTOAST(data []byte) bool {
    signature := []byte{0x45, 0x52, 0x02, 0x00, 0x00, 0x00}
    if len(data) < 6 {
        return false
    }
    return bytes.Equal(data[:6], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Related Formats

.bin .dmg .img .iso .qcow .vdi

Frequently Asked Questions

What is a .toast file?

A .toast file is identified by the magic bytes 45 52 02 00 00 00 at byte offset 0. TOAST is a disc image file format created for Roxio Toast, a macOS optical disc authoring application originally developed by Adaptec and later maintained by Roxio and Corel. It is used to store CD, DVD, and related disc contents for burning, duplication, and archival workflows in Toast and compatible imaging tools. The format is generally safe, though as with any disk image, files from untrusted sources should be handled cautiously.

What are the magic bytes for .toast files?

The magic bytes for TOAST files are 45 52 02 00 00 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .toast file?

To validate a .toast file, read the first bytes of the file and compare them against the known magic bytes (45 52 02 00 00 00) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .toast files?

The primary MIME type for .toast files is application/x-roxio-toast.

Is it safe to open .toast files?

TOAST (.toast) 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.