What is MIME type "image/naplps"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

image/naplps refers to a graphics format that uses the NAPLPS protocol. NAPLPS stands for North American Presentation Level Protocol Syntax. It encodes vector graphics using simple commands. This method sends images over low-bandwidth networks, making it useful for telecommunication and interactive display systems.

Transmits basic vector images over slow connections
Supports interactive presentations
Renders images using lines, curves, and text commands

Files using this MIME type typically have the extension NAP. More details are available on NAPLPS on Wikipedia.

Associated file extensions

.nap

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: image/naplps

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="image/naplps">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'image/naplps');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.nap

FAQs

Do modern web browsers support the image/naplps MIME type?

No, modern browsers like Chrome, Firefox, and Edge do not natively support NAPLPS graphics. This format is considered obsolete; to display these images on the web today, they must typically be converted to a modern vector format like image/svg+xml or a raster format like PNG.

How do I open a file with the .nap extension?

You cannot open .nap files with standard image viewers like Windows Photos or macOS Preview. Because these files contain specialized vector instructions for vintage videotex systems, you will need a dedicated NAPLPS decoder, a specific emulator, or a file conversion tool designed for legacy graphics.

How do I configure an Apache server to serve NAPLPS files?

To ensure your Apache server sends the correct headers for these files, add the following line to your .htaccess file or main configuration: AddType image/naplps .nap. This tells the server to associate the .nap extension with the image/naplps MIME type.

What is the relationship between NAPLPS and SVG?

Both are vector graphics formats, meaning they describe images using shapes and lines rather than pixels. However, NAPLPS was optimized for extremely low-bandwidth transmission in the 1980s, whereas SVG is an XML-based standard used for modern responsive web design.

How do I add support for image/naplps in Nginx?

For Nginx, you should update your mime.types file or add a types block within your server configuration. Use the following syntax: types { image/naplps nap; }. reload Nginx afterwards to apply the changes.

Why would I encounter an image/naplps file today?

You are most likely to encounter this MIME type when working with digital archives of early online services (like Prodigy or Telidon) or teletext systems. It is rarely used for new content creation but is important for the preservation of early computer graphics history.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.