Upload a FLAC file and get a MP3 back. No signup, no watermark, no limit on how many.
FLAC compresses losslessly: it typically halves a WAV and gives back bit-for-bit the same audio when decoded. It is free, open, and widely supported outside Apple's world.
Where you run into it: Archived rips, Bandcamp and Qobuz downloads, anyone who keeps a music library they intend to still have in ten years.
What it costs you: Half of enormous is still large, and some hardware — car head units especially — will not touch it.
MP3 is the format that made portable music work, and thirty years on it is still the one every device, car stereo, DAW and browser will open without being asked twice.
Where you run into it: Downloads, podcast feeds, old music libraries, anything a client sends you and expects you to just play.
What it costs you: It throws audio away to get small, and at 320 kbps almost nobody can hear what went. What matters is that the discarded part never comes back.
This is the conversion most people reach this site for, and the comfortable thing about it is that your source is expendable in a way no lossy file ever is. A FLAC is a complete copy, so you can encode from it today at 192 kbps, change your mind next year and encode again at 320, and the second attempt will be exactly as good as the first. Every other source on this site punishes a second pass. This one does not, which means there is no decision here you cannot walk back.
The destination is almost always something that will not read FLAC: a car stereo, a gym watch, a cheap USB player, DJ software with an older library, a school or church PA. Your tags come with you — artist, album and title all survive this conversion, so a properly tagged library arrives tagged, which is the practical advantage of starting from FLAC rather than from a WAV. Keep the FLAC as the library and treat the MP3 as the copy you let out of the house.
Yes, entirely, and there is no cap on how many files you convert. No account, no watermark, no trial.
Yes, and that is the trade you came for: the FLAC holds everything and the MP3 holds what a listener will notice. Best is a variable setting, so the encoder follows the music rather than a number, and from a lossless source it lands where almost nobody can pick the MP3 out in a fair comparison. The thing worth knowing is that you are not gambling. If the result disappoints you, the FLAC is untouched and you can simply encode it again higher.
Roughly a fifth of the FLAC at Best — a 30 MB album track becomes something near 6 MB — which is a smaller jump than people expect, because the FLAC had already halved the uncompressed audio before you started. Against the original WAV it is closer to a tenth. A hi-res FLAC is the exception and shrinks dramatically, for a reason worth knowing: MP3 cannot carry a sample rate above 48 kHz, so a 96 kHz source is resampled on the way through.
Yes — MP3 is one of the formats this converter writes, so the reverse page exists at /mp3-to-flac/. Be clear about what comes back, though: the FLAC you get is a faithful copy of the MP3, not of the original. The loss happened on the way out, and returning to a lossless format stops further loss rather than undoing it. Keep the original FLAC if you still have it.
The file is uploaded to do the conversion — nothing here runs in your browser — and both your upload and the converted result are deleted the moment the file is sent back. Nothing is stored and nothing is logged beyond the request itself.