Convert between WAV, FLAC and MP3, and change sample rate or bit depth.
Your browser cannot play this format back, which says nothing about the file itself — download it and check in a player that can.
DownloadNeed to match a streaming loudness target instead? Use the Loudness Normalizer, then convert the result here.
This tool changes the container and encoding of an audio file: WAV, FLAC or MP3 out, at the sample rate and bit depth you choose. It does not touch the sound in any other way — no level change, no EQ, no dynamics. Converting at the same rate and depth to the same format gives you back the same audio.
Everything runs in your browser. Your file is decoded by the browser itself, converted by WebAssembly compiled from the reference encoders (LAME for MP3, libFLAC for FLAC), and handed straight back to you as a download. Those libraries and their licences are credited on the licences page.
| Format | Lossless | Use it for |
|---|---|---|
| WAV | Yes | DAW work, mastering, anything that will be processed again. Largest. |
| FLAC | Yes | Archiving and distribution where quality must be exact. Roughly half of WAV. |
| MP3 | No | Sharing, previews, anywhere size matters more than fidelity. |
FLAC is the one worth knowing about: it is compressed and exact. Decoding a FLAC returns the original samples bit for bit, so the only cost against WAV is the time spent compressing. If you are keeping a master, keep it as FLAC or WAV, never MP3.
Sample rate is how many times per second the audio was measured; it sets the highest frequency the file can represent. 44.1 kHz is CD and most streaming, 48 kHz is standard for video. Bit depth is how precisely each of those measurements is stored, which sets the noise floor: 16-bit is right for a finished file, 24-bit is what DAWs work in.
Both default to same as source here, and that is usually the right answer. Change them when a target spec demands it — a video timeline at 48 kHz, a distributor asking for 16-bit — not as a general improvement.
Converting to a higher rate or depth is offered because specs sometimes require it, but it adds no information. Upsampling a 44.1 kHz file to 96 kHz makes a bigger file containing exactly the same audio; it does not recover detail that was never recorded.