This audio converter lets you convert your WAV audio files into the common and widely supported MP3 format.
or drop, paste, or choose from cloud
A three-minute WAV recording is roughly 30 MB. The same audio as an MP3 is a few megabytes, small enough to email, upload or keep on a phone.
Set the bitrate, sample frequency, channels and volume normalisation, or leave everything on automatic.
Every upload and download runs over an encrypted connection, and your recordings are never shared with anyone.
Upload your WAV audio file.
Choose optional settings like bitrate or channels to optimize your MP3 file. (optional)
Start the MP3 conversion by clicking "Start".
WAV (Waveform Audio File Format) was defined by Microsoft and IBM in 1991 and stores sound uncompressed, as raw PCM samples. Nothing is discarded, so the file holds exactly what the microphone, recorder or mixing session produced.
That is why it is the working format for recording, mixing, and sampling. It is also why the files are so big. CD-quality stereo runs at 1,411 kbit/s, about 10 MB per minute. A WAV carries almost no metadata either, so players usually show it as an untitled track with no cover art.
Size, nearly always. A three-minute WAV weighs about 30 MB; the same recording as an MP3 is roughly 3 to 4 MB. That is the difference between an attachment a mail server rejects and one it accepts. It is also the difference between a voice memo you can share instantly and one that stalls on mobile data.
It also makes the audio portable. MP3 plays on every phone, car stereo, games console, podcast host, and upload form there is. Its ID3 tags also carry the title, artist, and cover art that a WAV cannot hold.
MP3 is lossy: the encoder throws away the detail your ears are least likely to notice. Converting from WAV means that happens exactly once, from a lossless master. You are not stacking artefacts on top of an already-compressed file, the way a lossy-to-lossy conversion does.
At 192 kbit/s most listeners cannot tell the MP3 from the WAV on ordinary playback gear, and 320 kbit/s narrows the gap further. For speech, 128 kbit/s or a mono channel setting halves the file again with nothing useful lost. If the recording is quiet or uneven, switch on normalisation while you convert.
Upload your WAV file above, pick a bitrate if you want to, and start the conversion. It is free, runs in the browser, and needs no account.
Around ten times smaller. A 3-minute stereo recording is roughly 30 MB as a WAV. The same recording is about 3 to 4 MB as an MP3, a reduction of close to 90%.
A WAV stores raw, uncompressed audio. CD-quality stereo takes 1,411 kbit/s, about 10 MB every minute, whatever the recording contains. MP3 encodes only what you can realistically hear, and that is where the saving comes from.
Some data is discarded, because MP3 is a lossy format. Since a WAV is uncompressed, this is a single first-generation encode. At 192 kbit/s or higher the difference is inaudible for most listeners and most material.
192 kbit/s is a safe default for music. Use 320 kbit/s for anything you want to keep as an archive copy. Use 128 kbit/s or mono for speech, interviews, and podcasts, where it halves the file again.
Yes. Add as many WAV files as you need and they are converted in one batch, each returned as a separate MP3.
Free conversions cover everyday music and podcast files. If you regularly work with long recordings, a subscription raises the limit and removes the queue.
No. The converter runs entirely in your browser, so it works the same on Windows, macOS, Linux, Android and iOS.
Everything here runs in the browser, with no install and no sign-up.
