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TEXI (.texi)

.texi file signature | application/x-texinfo

Texinfo (TEXI) is a plain-text documentation source format created by Richard Stallman and maintained as part of the GNU Project. It is used to write software manuals, reference guides, and books that can be published in multiple output formats, including HTML, PDF, and Info. Because it is text-based, it is generally low risk; however, generated output may include embedded links or macros, and the format is now largely associated with GNU documentation tooling.

Safe

Magic Bytes

Offset 0
5C 69 6E 70 75 74 20 74 65 78 69 6E 66 6F

Sources: Apache Tika

Extension

.texi

MIME Type

application/x-texinfo

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .texi files in Python

Python 
def is_texi(file_path: str) -> bool:
    """Check if file is a valid TEXI by magic bytes."""
    signature = bytes([0x5C, 0x69, 0x6E, 0x70, 0x75, 0x74, 0x20, 0x74, 0x65, 0x78, 0x69, 0x6E, 0x66, 0x6F])
    with open(file_path, "rb") as f:
        return f.read(14) == signature

How to validate .texi files in Node.js

Node.js 
function isTEXI(buffer: Buffer): boolean {
  const signature = Buffer.from([0x5C, 0x69, 0x6E, 0x70, 0x75, 0x74, 0x20, 0x74, 0x65, 0x78, 0x69, 0x6E, 0x66, 0x6F]);
  return buffer.subarray(0, 14).equals(signature);
}

How to validate .texi files in Go

Go 
func IsTEXI(data []byte) bool {
    signature := []byte{0x5C, 0x69, 0x6E, 0x70, 0x75, 0x74, 0x20, 0x74, 0x65, 0x78, 0x69, 0x6E, 0x66, 0x6F}
    if len(data) < 14 {
        return false
    }
    return bytes.Equal(data[:14], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Related Formats

.texinfo .tex

Frequently Asked Questions

What is a .texi file?

A .texi file is identified by the magic bytes 5C 69 6E 70 75 74 20 74 65 78 69 6E 66 6F at byte offset 0. Texinfo (TEXI) is a plain-text documentation source format created by Richard Stallman and maintained as part of the GNU Project. It is used to write software manuals, reference guides, and books that can be published in multiple output formats, including HTML, PDF, and Info. Because it is text-based, it is generally low risk; however, generated output may include embedded links or macros, and the format is now largely associated with GNU documentation tooling.

What are the magic bytes for .texi files?

The magic bytes for TEXI files are 5C 69 6E 70 75 74 20 74 65 78 69 6E 66 6F at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .texi file?

To validate a .texi file, read the first bytes of the file and compare them against the known magic bytes (5C 69 6E 70 75 74 20 74 65 78 69 6E 66 6F) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .texi files?

The primary MIME type for .texi files is application/x-texinfo.

Is it safe to open .texi files?

TEXI (.texi) 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.