What is MP3 (MPEG-1 Audio Layer III)?
MP3 is the classic compressed audio format that plays on practically every device made in the last 25 years.
If you are unsure which audio format to send someone, MP3 is the safe bet. At 192 kbit/s most listeners cannot tell it apart from the CD, and 320 kbit/s leaves headroom for good headphones.
File extensions: .mp3MIME types: audio/mpeg
Advantages
- Plays everywhere, from car stereos to smart speakers
- Small files at good quality
- Supports ID3 tags with title, artist and cover
Disadvantages
- Lossy: fine detail is removed
- Less efficient than AAC or Opus at low bitrates
- No gapless playback by default
Typical uses
- Music collections
- Podcasts and audiobooks
- Sharing recordings with anyone
Compatibility
Supported by every browser, operating system, phone, car radio and media player.
Convert MP3 to another format
Convert to MP3 from another format
Frequently asked questions
Are my files uploaded to a server?
No. The conversion runs entirely in your browser with local code. Your files never leave your device, and there is no upload.
Is there a file size limit?
There is no limit on our side, but your browser memory is. Images work for very large files; for videos, files above a few hundred megabytes can fail on devices with little memory.
Will the quality suffer?
That depends on the target format and settings. Use the quality option to balance size and detail; lossless targets keep everything the source contained.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari. Fast hardware paths are used where available, with a compatible fallback otherwise.