Technical MIME Specification & Web Server Guide

application/json

Technical overview, official IANA specification, header magic bytes, and server configuration snippets for .JSON files (JavaScript Object Notation).

File Extension

.json

Content-Type Header

application/json

Format Category

Code & Web

Standard Specification

RFC 8259

Description & Usage

Lightweight text-based data interchange format widely used in REST APIs.

HTTP Server Content-Type Configuration Code

# Nginx mime.types configuration for .json
types {
    application/json    json;
}

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.

Frequently Asked Questions

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