File Format Guide
What is a .MP3 file?
The MP3 format (short for MPEG-1 Audio Layer III) is an audio format that uses lossy compression, trading some fine detail for much smaller files. It acts as a container that packages audio together for playback. MP3 files open natively in every modern web browser.
.MP3 at a glance
| Category | Audio |
|---|---|
| Type | Audio |
| Compression | Lossy |
| Open standard | No |
| Opens in web browsers | Yes |
| Typical file size | Small |
How to open a .MP3 file
You can open MP3 files with every device, every browser, and every player. If a program on your device cannot read one, the quickest fix is to convert it to a more common format — no software install required.
MP3 pros and cons
Strengths
- plays on every device and app
- small files at good quality
- the universal audio format
Limitations
- lossy compression discards some detail
- not ideal for editing or mastering
What .MP3 files are used for
- music and podcasts
- voice recordings
- universal playback
Need to convert a .MP3 file?
Convert MP3 to and from other formats free in your browser — no signup to start, no watermarks.
Open the MP3 Converter