PostScript file (.ps)
.ps file signature | application/postscript
PostScript document
Magic Bytes
Offset 0
25 21
Sources: Apache Tika
All Known Signatures
6 signature variants are documented for .ps files across multiple sources.
| Hex Signature | Offset | Sources |
|---|---|---|
| 25 21 | 0 | Apache Tika |
| 04 25 21 | 0 | Apache Tika |
| C5 D0 D3 C6 | 0 | Apache Tika |
| 25 21 50 53 2D 41 64 6F 62 65 2D 33 2E 30 20 45 50 53 46 2D 33 2E 30 | 0 | Apache Tika |
| 25 21 50 53 | 0 | Wikipedia |
| 25 21 50 53 2D 41 64 6F 62 65 2D | 0 | Gary Kessler |
Extension
.ps
MIME Type
application/postscript
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .ps files in Python
def is_ps(file_path: str) -> bool:
"""Check if file is a valid PS by magic bytes."""
signature = bytes([0x25, 0x21])
with open(file_path, "rb") as f:
return f.read(2) == signatureHow to validate .ps files in Node.js
function isPS(buffer: Buffer): boolean {
const signature = Buffer.from([0x25, 0x21]);
return buffer.subarray(0, 2).equals(signature);
}How to validate .ps files in Go
func IsPS(data []byte) bool {
signature := []byte{0x25, 0x21}
if len(data) < 2 {
return false
}
return bytes.Equal(data[:2], signature)
}API Endpoint
/api/v1/ps
curl https://filesignature.org/api/v1/ps
See the full API documentation for all endpoints and parameters.
Frequently Asked Questions
What is a .ps file?
A .ps file is a PostScript file file. PostScript document
What are the magic bytes for .ps files?
The magic bytes for PostScript file files are 25 21 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .ps file?
To validate a .ps file, read the first bytes of the file and compare them against the known magic bytes (25 21) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .ps files?
The primary MIME type for .ps files is application/postscript.
Is it safe to open .ps files?
PostScript file (.ps) 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.