Skip to content

Ogg Vorbis Codec compressed Multimedia file (.ogg)

.ogg file signature | audio/ogg

Ogg is a free, open multimedia container format developed and maintained by the Xiph.Org Foundation. It is commonly used to store compressed audio, especially Vorbis and Opus streams, and is supported by many media players, web browsers, and streaming applications. The format is generally considered safe to open, though—as with any media file—malformed or corrupted files can occasionally trigger parsing issues in vulnerable software.

Safe

Magic Bytes

Offset 0
4F 67 67 53 00 02 00 00 00 00 00 00 00 00

Sources: Gary Kessler, Neil Harvey FileSignatures

All Known Signatures

3 signature variants are documented for .ogg files across multiple sources.

Hex Signature Offset Sources
4F 67 67 53 00 02 00 00 00 00 00 00 00 00 0 Gary Kessler, Neil Harvey FileSignatures
4F 67 67 53 00 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 2E 01 76 6F 72 62 69 73 0 Apache Tika
4F 67 67 53 0 Wikipedia

Extension

.ogg

MIME Type

audio/ogg, audio/vorbis

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .ogg files in Python

Python 
def is_ogg(file_path: str) -> bool:
    """Check if file is a valid OGG by magic bytes."""
    signature = bytes([0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00])
    with open(file_path, "rb") as f:
        return f.read(14) == signature

How to validate .ogg files in Node.js

Node.js 
function isOGG(buffer: Buffer): boolean {
  const signature = Buffer.from([0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]);
  return buffer.subarray(0, 14).equals(signature);
}

How to validate .ogg files in Go

Go 
func IsOGG(data []byte) bool {
    signature := []byte{0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
    if len(data) < 14 {
        return false
    }
    return bytes.Equal(data[:14], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Related Formats

.oga .opus .spx .flac .m4a .aac

Frequently Asked Questions

What is a .ogg file?

A .ogg file is a Ogg Vorbis Codec compressed Multimedia file file. Ogg is a free, open multimedia container format developed and maintained by the Xiph.Org Foundation. It is commonly used to store compressed audio, especially Vorbis and Opus streams, and is supported by many media players, web browsers, and streaming applications. The format is generally considered safe to open, though—as with any media file—malformed or corrupted files can occasionally trigger parsing issues in vulnerable software.

What are the magic bytes for .ogg files?

The magic bytes for Ogg Vorbis Codec compressed Multimedia file files are 4F 67 67 53 00 02 00 00 00 00 00 00 00 00 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .ogg file?

To validate a .ogg file, read the first bytes of the file and compare them against the known magic bytes (4F 67 67 53 00 02 00 00 00 00 00 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 .ogg files?

The primary MIME type for .ogg files is audio/ogg. Additional MIME types include: audio/ogg, audio/vorbis.

Is it safe to open .ogg files?

Ogg Vorbis Codec compressed Multimedia file (.ogg) 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.