WAV to MP3
Your files never leave your browser. Nothing is uploaded to any server.
No sign-up · No account needed to download · No limit on the number of conversions
Files
Settings apply to every file. Set start and end to keep only part of a file.
How to convert WAV to MP3
- Drop one or more WAV files into the box above, or tap Choose WAV files.
- Pick a bitrate, a sample rate and mono or stereo. Change the volume if the file is too quiet or too loud.
- To keep only part of a file, type a start and end time in seconds.
- Press Convert, then Download next to each file.
WAV to MP3 converter FAQ
Are my files uploaded?
No. Your browser reads the WAV and encodes the MP3 on your device. The only files your browser downloads are this page and its three scripts, all from this site.
Do I need an account to download?
No. There is no sign-up or login on this site. The download button saves the converted file straight from your browser.
Which bitrates, sample rates and channels can I choose?
Sample rates of 16, 22.05, 24, 32, 44.1 and 48 kHz. The bitrate list changes with the sample rate and channels, and only shows bitrates that the encoder produced exactly in our tests: 128 to 320 kbps at 44.1 and 48 kHz, 96 to 320 kbps at 32 kHz, and up to 160 kbps at 24 kHz and below. Choosing mono adds lower bitrates at every sample rate except 16 kHz. For channels, Same as file keeps mono as mono and stereo as stereo, Mono mixes left and right together, and Stereo copies a mono file to both sides. Files with more than two channels are mixed down to stereo.
Which WAV files work?
WAV files with 8, 16, 24 or 32-bit PCM, 32-bit float, A-law or μ-law audio, in mono, stereo or 5.1, and RF64 files. We tested sample rates from 8 kHz to 384 kHz. In the Chromium browser we tested with, WAV files with 64-bit float, ADPCM (IMA or Microsoft) or GSM audio did not decode. When a file doesn't decode, the page tells you, and names the format if it can read it from the file.
Does converting WAV to MP3 lose quality?
Yes. WAV is uncompressed and MP3 is lossy, so the encoder removes detail to make the file smaller. A higher bitrate keeps more detail and gives a larger file. Lowering the sample rate also cuts the highest frequencies.
Are tags and cover art kept?
No. The MP3 contains the audio only. Title, artist and other information stored in the WAV are not copied.
Why is the MP3 a little longer than the WAV?
MP3 encoding adds a little silence to fill whole frames, so the MP3 came out 0.03 to 0.08 seconds longer than the WAV in our tests. WAV output matched the original length to within one sample in our tests.
Is there a limit on file size or number of files?
This page sets none, but your device's memory and time do. The page reads a PCM WAV 30 seconds at a time, so the whole WAV is never held in memory at once. The converted file is held in memory until you download it. On our test computer, with the browser limited to 2.5 GB of memory, a 2-hour WAV (1.27 GB) converted to MP3 in about 11 minutes, and a 1-hour 96 kHz 24-bit WAV (2.07 GB) converted in about 6 minutes. Choosing WAV output needs much more memory: 1 hour of 44.1 kHz stereo comes out at over 600 MB. We haven't tested WAV files larger than 2.07 GB. Files are converted one after another.