FH8 (.fh8)
.fh8 file signature | image/x-freehand
FH8 is a legacy FreeHand 8 drawing document format developed by Macromedia, later maintained by Adobe after its acquisition of FreeHand. It was used for vector illustrations, logos, page layouts, and other desktop publishing artwork in FreeHand 8 workflows. The format is now obsolete, and older files may require legacy software or conversion tools for access, but it is generally considered low risk when opened with modern converters.
Magic Bytes
Offset 0
41 47 44 33
Sources: Apache Tika, Wikipedia
All Known Signatures
6 signature variants are documented for .fh8 files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 41 47 44 33 | 0 | Apache Tika, Wikipedia |
| 41 47 44 32 | 0 | Apache Tika |
| 41 47 44 34 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 30 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 31 | 0 | Apache Tika |
| 46 72 65 65 48 61 6E 64 31 32 | 0 | Apache Tika |
Extension
.fh8
MIME Type
image/x-freehand
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .fh8 files in Python
def is_fh8(file_path: str) -> bool:
"""Check if file is a valid FH8 by magic bytes."""
signature = bytes([0x41, 0x47, 0x44, 0x33])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .fh8 files in Node.js
function isFH8(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x47, 0x44, 0x33]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .fh8 files in Go
func IsFH8(data []byte) bool {
signature := []byte{0x41, 0x47, 0x44, 0x33}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/fh8
curl https://filesignature.org/api/v1/fh8
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .fh8 file?
A .fh8 file is identified by the magic bytes 41 47 44 33 at byte offset 0. FH8 is a legacy FreeHand 8 drawing document format developed by Macromedia, later maintained by Adobe after its acquisition of FreeHand. It was used for vector illustrations, logos, page layouts, and other desktop publishing artwork in FreeHand 8 workflows. The format is now obsolete, and older files may require legacy software or conversion tools for access, but it is generally considered low risk when opened with modern converters.
What are the magic bytes for .fh8 files?
The magic bytes for FH8 files are 41 47 44 33 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .fh8 file?
To validate a .fh8 file, read the first bytes of the file and compare them against the known magic bytes (41 47 44 33) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .fh8 files?
The primary MIME type for .fh8 files is image/x-freehand.
Is it safe to open .fh8 files?
FH8 (.fh8) 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.