Free online converter for converting files to MP3.
We ensure quality, convenience, and support for all formats.
| Data type | Audio |
| MIME type | audio/mpeg |
| Developer | Fraunhofer IIS |
| Primary use cases | Music distribution, podcasts, audiobooks, voice recordings, web audio |
MP3 is a widely used lossy audio format known for strong compression and universal compatibility.
| Data type | Audio |
| MIME type | audio/mpeg |
| Compression | Perceptual lossy compression |
| Audio codec | MPEG Layer III |
| Bitrates | Typically 96–320 kbps, supports CBR and VBR |
| Sampling rates | 8–48 kHz depending on MPEG version |
| Channels | Mono, Stereo, Joint Stereo, Dual Channel |
| Metadata | ID3v1, ID3v2, APE tags |
| Container format | MP3 bitstream with optional ID3 metadata |
| Standard / Specification | ISO/IEC 11172-3, ISO/IEC 13818-3 |
| Typical file size | ~1 MB per minute at 128 kbps, ~2.4 MB per minute at 320 kbps |
| Performance impact | Low decoding cost, encoding is computationally heavier but well optimized |
| Year introduced | 1993 |
The MP3 file format offers several advantages that make it suitable for common use cases.
The MP3 file format has certain limitations that may affect its use in specific scenarios.
MP3 is widely supported and plays on most devices by default.
Potential vulnerabilities in decoders and metadata parsers, keep playback software updated
Historically patented, major patents have expired