What is MIME type "application/etl"?

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

application/etl is the MIME type for files storing Event Trace Log data on Windows systems.
These files capture system events, performance metrics, and diagnostic data during operations. The data is stored in a binary format, which requires specialized tools to read and analyze.

Stores detailed event tracing information
Helps diagnose system issues and performance bottlenecks
Used in debugging and system monitoring by developers and administrators
Part of the Windows Event Tracing process

ETL files (ETL) are not meant for casual editing or viewing. They are processed with tools provided by Microsoft for performance analysis and troubleshooting.
For more technical details, visit the Microsoft Event Tracing portal.

Associated file extensions

.etl

Usage Examples

HTTP Header

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


    Content-Type: application/etl

HTML

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


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

Associated file extensions

.etl

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.