ROFF (.roff)

.roff file signature | text/troff

Safe

Magic Bytes

Offset 0


              2E 5C 22

Sources: Apache Tika

All Known Signatures

5 signature variants are documented for .roff files across multiple sources.

Hex Signature	Offset	Sources
2E 5C 22	0	Apache Tika
27 5C 22	0	Apache Tika
27 2E 5C 22	0	Apache Tika
5C 22	0	Apache Tika
27 27 27	0	Apache Tika

Extension

.roff

MIME Type

text/troff

Byte Offset

Risk Level

Safe

Validation Code

How to validate .roff files in Python

Python

def is_roff(file_path: str) -> bool:
    """Check if file is a valid ROFF by magic bytes."""
    signature = bytes([0x2E, 0x5C, 0x22])
    with open(file_path, "rb") as f:
        return f.read(3) == signature

How to validate .roff files in Node.js

Node.js

function isROFF(buffer: Buffer): boolean {
  const signature = Buffer.from([0x2E, 0x5C, 0x22]);
  return buffer.subarray(0, 3).equals(signature);
}

How to validate .roff files in Go

func IsROFF(data []byte) bool {
    signature := []byte{0x2E, 0x5C, 0x22}
    if len(data) < 3 {
        return false
    }
    return bytes.Equal(data[:3], signature)
}

API Endpoint

GET /api/v1/roff


              curl https://filesignature.org/api/v1/roff

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .roff file?

A .roff file is a ROFF file.

What are the magic bytes for .roff files?

The magic bytes for ROFF files are 2E 5C 22 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .roff file?

To validate a .roff file, read the first bytes of the file and compare them against the known magic bytes (2E 5C 22) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .roff files?

The primary MIME type for .roff files is text/troff.

Is it safe to open .roff files?

ROFF (.roff) 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.