What is MIME type "application/dr-halo"?

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

application/dr-halo is a MIME type for a proprietary bitmap format used by specific software suites. It is designed for handling images saved as Dr. Halo Bitmap files. The file extension associated with these images is CUT.

This format stores bitmap image data in a custom structure.
It is used primarily within environments that require dedicated tools and workflows.
The design may include specific compression or color handling optimized for its use case.
It remains specialized and is uncommon in everyday computing.

For technical details on MIME types, visit the IANA Media Types site.

Associated file extensions

.cut

Usage Examples

HTTP Header

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


    Content-Type: application/dr-halo

HTML

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


    <a href="file.dat" type="application/dr-halo">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', 'application/dr-halo');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.cut

FAQs

Can web browsers display application/dr-halo images natively?

No, modern web browsers like Chrome, Firefox, and Edge do not support the application/dr-halo MIME type or .cut files. To display these images on a website, you must convert them to standard web-compatible formats like image/png or image/jpeg.

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

Since .cut files are Dr. Halo Bitmaps, you need specialized graphics software to view or edit them. Tools like Corel PaintShop Pro, XnView, or IrfanView can typically open these legacy files. You may also need the associated .pal file for correct color rendering.

How do I configure Apache to serve .cut files correctly?

To ensure your Apache server sends the correct headers for Dr. Halo files, add the following line to your .htaccess file or server configuration: AddType application/dr-halo .cut. This ensures the browser or client application recognizes the file type during download.

Why do my Dr. Halo images look black and white or have wrong colors?

The .cut format stores the image data, but the color palette is often stored in a separate file with a .pal extension. If the viewing software cannot find the matching palette file in the same directory, the image may render with incorrect colors or in grayscale.

Is application/dr-halo safe to use on a public website?

While the format itself is just image data, it is a proprietary legacy format not meant for the web. Serving these files forces users to download them rather than view them. For security and usability, it is better to convert the content to a modern standard before publishing.

How do I add support for this MIME type in Nginx?

You can add the MIME type definition to your mime.types file or inside a specific server block. Add the line: application/dr-halo cut;. Reload Nginx using sudo nginx -s reload to apply the changes.

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.