.mp3
Audio · audio/mpeg
Opens with
Sound only. These split into formats that throw audio away to shrink the file and formats that keep every sample.
| MIME type | audio/mpeg |
|---|---|
| Category | Audio |
| Opens in a browser | Yes |
| Plain text | No |
| Registered type | Yes |
How to read this
- An extension is a label, not the contents. Rename a file to .png and if the bytes inside are JPEG, it is still a JPEG.
- A MIME type is how the internet names a file kind. Browsers look at that value, not the extension, to decide whether to display or download.
- A MIME type starting with x- was never registered as a standard. Plenty are in wide use, but they are not official names.
- Video extensions name a container. The same .mp4 may play on one device and not another, depending on the codec inside.
Frequently asked questions
Q. What is a .mp3 file?
It belongs to the audio category and its MIME type is audio/mpeg. The contents are binary, so opening it in a text editor shows garbage.
Q. What opens a .mp3 file?
Chrome, VLC, iTunes, Windows Media Player all handle it. In a browser it opens directly, with no extra software.
Q. What is the MIME type of .mp3?
audio/mpeg. The first half, audio, names the broad kind; the second half, mpeg, names the exact format. It is a registered standard name.
Q. Can I convert a .mp3 file to another format?
Yes — open it and re-save through a converter. Renaming alone changes only the label; the bytes stay put, and programs that check the real format may refuse to open it.
Q. My .mp3 file will not open.
First check that Chrome is installed. If it still fails, the download may have been cut short, or the file may only be named .mp3 while holding a different format inside.