What is MIME type "application/x-rar-compressed"?

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

application/x-rar-compressed designates files that use the RAR compression format. It bundles multiple files into one archive with efficient compression algorithms.

Files using this MIME type include those with the extensions RAR, R00, and REV.


This MIME type is used widely in backup processes, file sharing, and secure storage. Programs like WinRAR or similar tools are needed to open and extract these archives. For more on compressed file formats, check trusted tech sites online.

Associated file extensions

.rar, .r00, .rev

Usage Examples

HTTP Header

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


    Content-Type: application/x-rar-compressed

HTML

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


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

Associated file extensions

.rar, .r00, .rev

FAQs

Is application/x-rar-compressed the official standard for RAR files?

No, the officially registered IANA media type is application/vnd.rar. However, application/x-rar-compressed is a widely used legacy type that ensures broad compatibility with older browsers and servers. Many systems treat it similarly to generic binary data.

How do I configure Apache to serve RAR files correctly?

You can map the extensions to the MIME type in your .htaccess file or server config. Add the line AddType application/x-rar-compressed .rar .r00 .rev to ensure the server sends the correct Content-Type header during downloads.

Why does my browser download the file instead of opening it?

Web browsers do not have native engines to decompress or view RAR archives. When they encounter application/x-rar-compressed, they default to downloading the file so you can open it with external software like WinRAR, 7-Zip, or The Unarchiver.

What is the correct Nginx configuration for RAR archives?

To serve these files properly on Nginx, ensure your mime.types file includes the mapping. You can add application/x-rar-compressed rar r00 rev; inside the types { ... } block to prevent browsers from misinterpreting the file as text.

What are .r00 and .rev files associated with this MIME type?

These extensions indicate multi-volume or recovery archives. A .r00 file is part of a split archive sequence, while a .rev file contains redundancy data to reconstruct damaged archives. All usually share the same MIME type.

Are there security risks associated with application/x-rar-compressed?

Yes, compressed archives are a common vector for hiding malware to bypass email filters. While the MIME type itself is just a label, you should always scan the downloaded archive with antivirus software before extracting its contents.

Can I use application/zip instead of application/x-rar-compressed?

No, RAR and ZIP use completely different compression algorithms. Mislabeling a RAR file as application/zip may cause the user's operating system to attempt opening it with the wrong utility, resulting in error messages.

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.