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PRX (.prx)

.prx file signature | application/octet-stream

PRX is a Sony PlayStation Portable program module format based on the Executable and Linkable Format, maintained within the PSP software ecosystem by Sony. It is used for system modules, plugins, games, and other executable components on the PlayStation Portable and related development tools. PRX files are historically associated with firmware and homebrew software; like other executables, they should be opened only from trusted sources.

Safe

Magic Bytes

Offset 0
7F 45 4C 46

Sources: Wikipedia

Extension

.prx

MIME Type

application/octet-stream

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .prx files in Python

Python 
def is_prx(file_path: str) -> bool:
    """Check if file is a valid PRX by magic bytes."""
    signature = bytes([0x7F, 0x45, 0x4C, 0x46])
    with open(file_path, "rb") as f:
        return f.read(4) == signature

How to validate .prx files in Node.js

Node.js 
function isPRX(buffer: Buffer): boolean {
  const signature = Buffer.from([0x7F, 0x45, 0x4C, 0x46]);
  return buffer.subarray(0, 4).equals(signature);
}

How to validate .prx files in Go

Go 
func IsPRX(data []byte) bool {
    signature := []byte{0x7F, 0x45, 0x4C, 0x46}
    if len(data) < 4 {
        return false
    }
    return bytes.Equal(data[:4], signature)
}

API Endpoint

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

See the full API documentation for all endpoints and parameters.

Related Formats

.axf .elf .ko .o .out .so

Frequently Asked Questions

What is a .prx file?

A .prx file is identified by the magic bytes 7F 45 4C 46 at byte offset 0. PRX is a Sony PlayStation Portable program module format based on the Executable and Linkable Format, maintained within the PSP software ecosystem by Sony. It is used for system modules, plugins, games, and other executable components on the PlayStation Portable and related development tools. PRX files are historically associated with firmware and homebrew software; like other executables, they should be opened only from trusted sources.

What are the magic bytes for .prx files?

The magic bytes for PRX files are 7F 45 4C 46 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .prx file?

To validate a .prx file, read the first bytes of the file and compare them against the known magic bytes (7F 45 4C 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 .prx files?

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

Is it safe to open .prx files?

PRX (.prx) 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.