bzip2compressed archive magic bytes (.tb2)
.tb2 file signature: 42 5A 68 | application/octet-stream
The TB2 format is a bzip2-compressed archive format associated with the bzip2 compression utility, originally created by Julian Seward and maintained as an open-source standard. It is used to reduce file size for software distributions, backups, and other data transfers where storage efficiency and decompression compatibility are important. The format is generally safe, though malformed archives can cause decompression errors, and bzip2 has largely been superseded by newer compressors in some workflows.
Magic Bytes
Offset 0
42 5A 68
Sources: Gary Kessler
Validation Code
How to validate .tb2 files in Python
def is_tb2(file_path: str) -> bool:
"""Check if file is a valid TB2 by magic bytes."""
signature = bytes([0x42, 0x5A, 0x68])
with open(file_path, "rb") as f:
return f.read(3) == signatureHow to validate .tb2 files in Node.js
function isTB2(buffer: Buffer): boolean {
const signature = Buffer.from([0x42, 0x5A, 0x68]);
return buffer.subarray(0, 3).equals(signature);
}How to validate .tb2 files in Go
func IsTB2(data []byte) bool {
signature := []byte{0x42, 0x5A, 0x68}
if len(data) < 3 {
return false
}
return bytes.Equal(data[:3], signature)
}API Endpoint
/api/v1/tb2
curl https://filesignature.org/api/v1/tb2
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .tb2 file?
A .tb2 file is a bzip2compressed archive. The TB2 format is a bzip2-compressed archive format associated with the bzip2 compression utility, originally created by Julian Seward and maintained as an open-source standard. It is used to reduce file size for software distributions, backups, and other data transfers where storage efficiency and decompression compatibility are important. The format is generally safe, though malformed archives can cause decompression errors, and bzip2 has largely been superseded by newer compressors in some workflows.
What are the magic bytes for .tb2 files?
The magic bytes for bzip2compressed archive (.tb2) files are 42 5A 68 at byte offset 0. These bytes identify the file format more reliably than the extension alone.
How do I validate a .tb2 file?
To validate a .tb2 file, read the first bytes of the file and compare them against the known magic bytes (42 5A 68) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .tb2 files?
There is no officially registered MIME type for .tb2 files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .tb2 files?
bzip2compressed archive (.tb2) 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.