Technical MIME Specification & Web Server Guide

application/x-plain

Technical overview, official IANA specification, header magic bytes, and server configuration snippets for .PLAIN files (PLAIN File Format).

File Extension

.plain

Content-Type Header

application/x-plain

Format Category

General Files

Standard Specification

IANA Registered Standard

Description & Usage

Binary or text file format identified by extension .plain

HTTP Server Content-Type Configuration Code

# Nginx mime.types configuration for .plain
types {
    application/x-plain    plain;
}

OS Compatibility Matrix

Windows

macOS

Linux

Android

iOS

Want to test header signatures or binary files?

Run binary magic byte inspection in Magic Byte Detector.

Preguntas frecuentes

Respuestas claras a las preguntas más habituales.

The official MIME content type for .plain files is "application/x-plain". Web servers use this header to instruct browsers how to render or process .plain data.