Convert WAV to MP3 in your browser
Turn large, uncompressed WAV recordings into compact MP3 files that play everywhere. The conversion runs on your own device, so your audio is never uploaded.
How it works
- 1
Choose or drop your WAV file. Other audio files (M4A, FLAC, OGG) and videos work too.
- 2
Keep MP3 at 192 kbps or pick 128, 256 or 320 kbps depending on how you will use the file.
- 3
Click WAV to MP3, then download the MP3. The file never left your device.
Why convert WAV to MP3?
WAV stores audio uncompressed. A CD-quality stereo WAV (16-bit, 44.1 kHz) uses about 1,411 kbps, which is roughly 10 MB for every minute of sound. That is ideal while you record or edit, but heavy once you want to email a take, share a podcast episode, put music on a phone or upload a voice-over to a website with a size limit.
MP3 removes the parts of the signal that are hardest to hear and keeps the rest. At 192 kbps the same minute weighs about 1.4 MB: around seven times smaller than the WAV, with a difference most listeners will not notice on phones, laptops or earbuds. And MP3 plays on practically everything, including old MP3 players, car stereos and web browsers.
Choosing the right bitrate
The bitrate decides the balance between size and fidelity. As a rule of thumb for a stereo WAV: 128 kbps gives about 1 MB per minute and is fine for speech, voice memos, lectures and podcasts. 192 kbps, the default, is a safe all-round choice for music and mixed content. 256 kbps and 320 kbps (about 2.4 MB per minute) keep more detail in cymbals, reverb tails and dense mixes, which matters if you listen on good headphones.
Keep your original WAV as the master. MP3 is a lossy format, so each conversion throws information away; if you later need another bitrate, convert again from the WAV rather than from an MP3.
MP3 is not your only option here. The same tool can also write M4A (AAC), which is usually a little more efficient at the same bitrate, or WAV again if you simply want a 16-bit PCM copy.
Private by design: nothing is uploaded
Most online converters send your file to a server and let you download the result. With unreleased songs, interviews or client recordings, that is a real risk, and uploading hundreds of megabytes of WAV also takes time.
Vidmini encodes the MP3 inside your browser with the LAME encoder compiled to WebAssembly. The page is not allowed to send your audio anywhere, there are no tracking cookies, and once loaded it keeps working offline. You can check it yourself: disconnect from the internet and convert a file.
Long recordings and large files
There is no size limit set by us. The output is written to your browser’s private storage as it is produced, so desktop browsers handle hour-long WAV recordings of several hundred megabytes or more. On phones the practical limit depends on free memory and storage.
When the MP3 is ready, “Continue with this file” lets you pass it to another tool without selecting it again.
Frequently asked questions
How much smaller will my MP3 be than the WAV?
For a standard 16-bit, 44.1 kHz stereo WAV, an MP3 at 128 kbps is about 11 times smaller, 192 kbps about 7 times smaller and 320 kbps about 4 times smaller. Higher-resolution WAV files (24-bit or 96 kHz) shrink even more.
Which bitrate should I choose?
128 kbps is enough for speech and voice recordings. 192 kbps is a good default for music. Choose 256 or 320 kbps if you care about every detail or plan to listen on high-quality headphones.
Does converting WAV to MP3 lose quality?
Yes, technically: MP3 is lossy and removes information the ear hardly notices. At 192 kbps and above, most people cannot tell the difference in normal listening. Keep the WAV if you still need to edit or master the audio.
Is my audio uploaded to a server?
No. The file is read and converted by your own browser. Our Content Security Policy only allows the page to contact vidmini.com for its own code, and no tracking cookies are used.
Is there a file size limit?
We don’t impose one. The result is streamed to your browser’s private storage, so large WAV files work on desktop computers. Phones are limited by their free memory and storage.
Which browsers can convert WAV to MP3?
The latest versions of Chrome, Edge, Safari and Firefox, on desktop and mobile. The MP3 encoder runs in WebAssembly, so it works the same way in every supported browser.