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FLIF (.flif)

.flif file signature | application/octet-stream

Free Lossless Image Format

Safe

Magic Bytes

Offset 0
46 4C 49 46

Sources: Wikipedia

Extension

.flif

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .flif files in Python

Python
def is_flif(file_path: str) -> bool:
    """Check if file is a valid FLIF by magic bytes."""
    signature = bytes([0x46, 0x4C, 0x49, 0x46])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .flif files in Node.js

Node.js
function isFLIF(buffer: Buffer): boolean {
  const signature = Buffer.from([0x46, 0x4C, 0x49, 0x46]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .flif files in Go

Go
func IsFLIF(data []byte) bool {
    signature := []byte{0x46, 0x4C, 0x49, 0x46}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .flif file?

A .flif file is a FLIF file. Free Lossless Image Format

What are the magic bytes for .flif files?

The magic bytes for FLIF files are 46 4C 49 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .flif file?

To validate a .flif file, read the first bytes of the file and compare them against the known magic bytes (46 4C 49 46) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .flif files?

There is no officially registered MIME type for .flif files. Systems typically use application/octet-stream as a generic fallback when handling this format.

Is it safe to open .flif files?

FLIF (.flif) 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.