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PFB (.pfb)

.pfb file signature | application/x-font-type1

Safe

Magic Bytes

Offset 0
80 01 FF FF 00 00 25 21 50 53 2D 41 64 6F 62 65 46 6F 6E 74

Sources: Apache Tika

All Known Signatures

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

Hex Signature Offset Sources
80 01 FF FF 00 00 25 21 50 53 2D 41 64 6F 62 65 46 6F 6E 74 0 Apache Tika
25 21 50 53 2D 41 64 6F 62 65 46 6F 6E 74 2D 31 2E 30 0 Apache Tika

Extension

.pfb

MIME Type

application/x-font-type1

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .pfb files in Python

Python 
def is_pfb(file_path: str) -> bool:
    """Check if file is a valid PFB by magic bytes."""
    signature = bytes([0x80, 0x01, 0xFF, 0xFF, 0x00, 0x00, 0x25, 0x21, 0x50, 0x53, 0x2D, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x46, 0x6F, 0x6E, 0x74])
    with open(file_path, "rb") as f:
        return f.read(20) == signature

How to validate .pfb files in Node.js

Node.js 
function isPFB(buffer: Buffer): boolean {
  const signature = Buffer.from([0x80, 0x01, 0xFF, 0xFF, 0x00, 0x00, 0x25, 0x21, 0x50, 0x53, 0x2D, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x46, 0x6F, 0x6E, 0x74]);
  return buffer.subarray(0, 20).equals(signature);
}

How to validate .pfb files in Go

Go 
func IsPFB(data []byte) bool {
    signature := []byte{0x80, 0x01, 0xFF, 0xFF, 0x00, 0x00, 0x25, 0x21, 0x50, 0x53, 0x2D, 0x41, 0x64, 0x6F, 0x62, 0x65, 0x46, 0x6F, 0x6E, 0x74}
    if len(data) < 20 {
        return false
    }
    return bytes.Equal(data[:20], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .pfb file?

A .pfb file is a PFB file.

What are the magic bytes for .pfb files?

The magic bytes for PFB files are 80 01 FF FF 00 00 25 21 50 53 2D 41 64 6F 62 65 46 6F 6E 74 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .pfb file?

To validate a .pfb file, read the first bytes of the file and compare them against the known magic bytes (80 01 FF FF 00 00 25 21 50 53 2D 41 64 6F 62 65 46 6F 6E 74) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .pfb files?

The primary MIME type for .pfb files is application/x-font-type1.

Is it safe to open .pfb files?

PFB (.pfb) 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.