Drop in a FLAC file and get a MP3 back in seconds. Free, no account, and nothing is kept on our server.
Convert audio files between MP3, WAV, FLAC, AAC, OGG, Opus, and more. Extract audio from video. Powered by FFmpeg — free, no installation.
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Supported formats: MP3, WAV, FLAC, AAC, OGG, OPUS, WMA, M4A, AIFF, AC3, AIFF, AMR
Also: MP4, MKV, AVI, MOV (extracts the audio track) · Max 512 MB
A lossless library is wonderful at home and impossible on a phone. Keep the FLAC originals, carry the MP3 copies.
FLAC, the Free Lossless Audio Codec, works like a ZIP archive designed specifically for sound. It typically lands 40-50% below WAV, and decoding returns the original samples bit for bit. It carries no patent or licence fees, which is why it became the default for archiving music you may want to re-encode later.
MP3, formally MPEG-1 Audio Layer III, was standardised in 1993 after years of work at Fraunhofer IIS. It discards sound the ear is unlikely to notice, which is how a three-minute track fits into a few megabytes instead of thirty. Nothing else comes close to its reach: every phone, browser, car stereo and cheap player made in the last two decades reads it. That universality, not sound quality, is why it is still the safe default today.
| FLAC | MP3 | |
|---|---|---|
| Released | 2001 | 1993 |
| Developed by | Josh Coalson, then Xiph.Org | Fraunhofer IIS / MPEG |
| Compression | lossless | lossy |
| Typical bitrate | 700-900 kbit/s | 128-320 kbit/s |
| Three-minute track | 15-20 MB | 3-7 MB |
| Quality ceiling | Exactly the source | Good, not transparent |
| Best suited to | Archiving a collection | Sharing, phones, car stereos |
| Playback support | Wide, except older Apple devices | Universal |
Yes, and the loss is permanent. MP3 compression works by discarding detail, and converting back to FLAC later will not bring it back. Keep your original if you may need to edit or re-encode.
A normal song finishes in a few seconds. Conversion runs on our server rather than in your browser, so the slow part is usually the upload, not the work itself. Long recordings such as lectures or podcasts take proportionally longer.
Your file is uploaded to our server because the conversion runs there. A cleanup task runs every hour and deletes anything older than an hour, so nothing you upload survives more than about two hours. We do not open your files, we do not keep copies, and no account is needed to use the converter.