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FLIC Animation file (.fli)

.fli file signature | application/octet-stream

FLIC Animation file

Safe

Magic Bytes

Offset 0
00 0D BB A0

Sources: Gary Kessler

All Known Signatures

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

Hex Signature Offset Sources
00 0D BB A0 0 Gary Kessler
00 11 AF 0 Gary Kessler

Extension

.fli

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .fli files in Python

Python
def is_fli(file_path: str) -> bool:
    """Check if file is a valid FLI by magic bytes."""
    signature = bytes([0x00, 0x0D, 0xBB, 0xA0])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .fli files in Node.js

Node.js
function isFLI(buffer: Buffer): boolean {
  const signature = Buffer.from([0x00, 0x0D, 0xBB, 0xA0]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .fli files in Go

Go
func IsFLI(data []byte) bool {
    signature := []byte{0x00, 0x0D, 0xBB, 0xA0}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .fli file?

A .fli file is a FLIC Animation file file. FLIC Animation file

What are the magic bytes for .fli files?

The magic bytes for FLIC Animation file files are 00 0D BB A0 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .fli file?

To validate a .fli file, read the first bytes of the file and compare them against the known magic bytes (00 0D BB A0) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .fli files?

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

Is it safe to open .fli files?

FLIC Animation file (.fli) 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.