Batch WAV to MP3 Converter
Convert WAV to MP3 online for free. 100% secure, fast, and private local file conversion directly in your browser. No software installation required.
Why convert WAV to MP3?
WAV files are enormous, around 10 MB per minute at CD quality, so anyone who records or receives WAVs eventually needs them smaller. Musicians shrinking session exports for quick sharing, voice actors sending audition clips, podcasters posting episodes, and people moving a studio library onto a phone all convert WAV to MP3. The goal is the same: keep the audio recognizable while cutting the file size by roughly 90 percent, making files email-friendly, phone-friendly, and web-friendly.
WasmConvert compresses WAV to MP3 entirely in your browser, so the file never leaves your device and you can shrink a whole multitrack export folder without uploading studio audio to a server. Choose the MP3 bitrate before converting: 320 kbps for music that still has to sound great, 192 or 128 kbps when size matters more, and convert multiple WAVs at once with no upload limits. The MP3 downloads straight to your device and nothing is stored.
Common use cases
- Shrinking DAW exports or master recordings from about 10 MB per minute to about 1 MB per minute for email or messaging
- Fitting a studio or field-recording library onto a phone or portable player
- Preparing WAV source files for platforms that cap upload sizes
How to convert WAV to MP3 (Step-by-step)
Select or drop your file
Click "Choose Files" or drag and drop your WAV file directly onto this page.
Set target format
Make sure the output format is set to MP3.
Local conversion
Click convert. Your file is processed entirely in your browser memory - no data is uploaded to our servers.
Save instantly
Once finished, your MP3 file is ready to download.
WAV is an uncompressed, lossless audio format. It is preferred for professional audio editing, though files are significantly larger than MP3s.
MP3 is the universal standard for digital audio compression. It provides a great balance between file size and sound quality.
Pro tips for WAV to MP3 conversion
- A CD-quality WAV becomes about 2.4 MB per minute at 320 kbps MP3, and closer to 1 MB per minute at 128 kbps
- Convert from the original WAV master, never from an MP3 you already made, because re-encoding a lossy file causes generation loss
- If your source is 24-bit or 96 kHz, MP3 downmixes to 16-bit 44.1 kHz anyway, so there is no benefit to keeping an oversized WAV just for playback