MP3 Converter
Convert files to and from MP3 — free, online, no signup.
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MP3 (MPEG-1 Audio Layer III) is a lossy audio format developed by the Fraunhofer Institute and released in 1993. It made digital music portable by shrinking audio to about a tenth of CD size, and remains the most universally compatible audio format ever made — everything plays MP3.
| Full name | MPEG-1 Audio Layer III |
| Developer | Fraunhofer Institute / MPEG |
| Released | 1993 |
| Type | Lossy compression |
| Typical use | music, podcasts, audiobooks, car stereos |
| MIME | audio/mpeg |
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Frequently asked questions
How do I open a MP3 file?
MP3 (MPEG-1 Audio Layer III) is a lossy audio format developed by the Fraunhofer Institute and released in 1993. It made digital music portable by shrinking audio to about a tenth of CD size, and remains the most universally compatible audio format ever made — everything plays MP3. If a device refuses to open it, the fastest fix is converting it to a more universal format with the converter above.
Is converting MP3 files free?
Yes — 10 conversions a day with files up to 200 MB, free, with no signup and no watermarks.
Which MP3 bitrate should I choose?
192 kbps (the default) is a great balance for music. Choose 320 kbps for archiving or critical listening, and 128 kbps for voice recordings and audiobooks where small size matters most.