WAV to MP3 Converter
A WAV file is roughly 10 MB per minute at CD quality.
The same audio at 320 kbps MP3 is about a tenth of that and sounds the same to most listeners on most playback systems. WAV to MP3 is what you do at the end of a project, when you need to share, upload, or stream the file.
How it works.
- 1Drop the WAVChoose any WAV file. PCM 16-bit, 24-bit, 32-bit float. All decode the same.
- 2Pick a bitrate320 kbps is the safe default. Transparent for almost everyone. 256 kbps is a fair compromise on size if you're emailing tracks. 192 kbps is the floor for music; below that you start hearing artifacts in cymbals and reverb tails. Don't go below 128 unless it's spoken word.
- 3DownloadThe MP3 carries your audio plus an ID3 v2 tag. Drop it on any phone, web player, or distributor.
Shrink a WAV without anyone hearing the difference
A CD-quality WAV runs about 10 MB a minute, a full track can be 40 or 50 MB, too big to email and slow to upload. The same song at 320 kbps MP3 is roughly a tenth of the size and sounds identical to almost everyone on almost everything. It's the format you reach for the moment a project is done and needs to go somewhere.
- 320 kbpsTransparent, the safe default
- 256 kbpsSmaller, still great for sharing
- 192 kbpsThe floor for music
- 128 kbps monoSpoken word / podcast
Your master never touches a stranger's server
This converts in your browser with the LAME encoder, the same one desktop tools use, so an unreleased master stays on your own machine. No upload wait, no file sitting in someone's cloud. Convert one track or bounce a whole album; it all happens locally.
Constant bitrate so it works in every player and feed
This encodes CBR (constant bitrate) on purpose. Variable bitrate can save a little space, but it trips up podcast feeds, older car stereos, and some DJ software, seek to the middle of a track and the timestamp is wrong. CBR just works, which is exactly what you want from a file you're handing to the world.
Questions.
What bitrate do I need?
320 kbps for music masters going to listeners. 192-256 kbps if size matters more than audiophile fidelity. 128 kbps mono is the standard for podcast voice. Below 96 kbps starts sounding bad even for speech.
Will MP3 sound exactly like the WAV?
Not exactly. MP3 is lossy. At 320 kbps the difference is inaudible to most listeners on most equipment. On studio monitors with good ears, you might hear softer cymbal detail and slightly less depth in reverb. For consumer playback it's transparent.
Is 320 kbps overkill for streaming?
Spotify, Apple Music, and YouTube all re-encode your upload to their own format anyway, so feeding them a 320 kbps MP3 is fine but no better than feeding them a high-quality WAV. Distributors prefer WAV; 320 kbps MP3 is for places that only take MP3.
CBR or VBR?
This tool encodes CBR (constant bitrate) for predictable file sizes. VBR can save space at similar quality but causes problems with some older players, podcast feeds, and DJ software. CBR is the safer default.
Why does the first conversion take longer?
ffmpeg.wasm downloads ~25 MB on first use, then caches. Every subsequent conversion in the session starts instantly.