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MIME Type
audio/mpeg
AudioStandard MIME type for MP3 audio files.
MIME type reference, HTTP example, browser usage, common mistakes, and related content.
What is the audio/mpeg MIME type?
The MIME type audio/mpeg is used to tell browsers, APIs, and servers how a file or response body should be interpreted.
MIME stands for Multipurpose Internet Mail Extensions, and MIME types are now a standard part of HTTP responses and web content delivery.
When a browser or client receives a response with audio/mpeg, it uses that information to decide how the content should be processed, rendered, downloaded, or executed.
Example
Content-Type: audio/mpeg
HTTP example
HTTP/1.1 200 OK Content-Type: audio/mpeg Content-Length: 1256
Common file extensions
.mp3
Common use cases
- Music streaming
- Podcast files
- Audio downloads
Common mistakes
- Using the wrong MIME type for the file being served
- Returning text/plain instead of audio/mpeg
- Forgetting required parameters like charset when relevant
- Using a deprecated MIME type in older server configurations
- Serving assets with a mismatched Content-Type header, causing browser parsing issues
How browsers use it
Browsers use the Content-Type response header to decide how a response should be handled. For example, HTML is rendered as a page, CSS is parsed as styles, JavaScript is executed as script, and images are displayed visually. If the MIME type is incorrect, the browser may refuse to load the file correctly or may treat it as plain text or a download instead.
Browser support
Strong browser support across modern browsers for web playback.
Developer note
Very common for audio on the web and in downloadable media.