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WAV to MP3 Converter — Free, Fast, No Upload

Turn big WAV recordings into small MP3s that play everywhere — right in your browser, with nothing uploaded.

Free · no signup2 free files a day100% in-browser · no upload

Tap to select WAV files

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2 free files per day (2 left today) · Up to 10 MB each · Upgrade for more

✓ Files never uploaded✓ 100% browser-based✓ No account required
Need the reverse?MP3 → WAV

How to convert WAV to MP3 online

  1. 1

    Drop your WAV file

    Drag your Waveform Audio File Format file onto the box above, or click it to pick a file.

  2. 2

    Wait a few seconds

    Conversion starts on its own and runs on your device, not on a server.

  3. 3

    Download your MP3

    Click Download to save the MPEG-1 Audio Layer III file.

WAV vs MP3: format overview

WAV

Waveform Audio File Format

Microsoft and IBM · 1991

Compression
none
Transparency
No
  • ✓ Lossless — no quality degradation
  • ✓ Universal DAW compatibility for production
  • ✗ Extremely large file sizes
MP3

MPEG-1 Audio Layer III

Fraunhofer Society · 1993

Compression
lossy
Transparency
No
  • ✓ Universal compatibility — plays everywhere
  • ✓ Good compression at 128–320 kbps

WAV magic bytes: 52 49 46 46 xx xx xx xx 57 41 56 45

MP3 magic bytes: 49 44 33 (ID3) / FF FB

Why convert WAV to MP3?

WAV is what recorders, DAWs and audio editors save: uncompressed sound, every sample kept. That's great for editing, but the files are big. CD-quality stereo WAV takes about 10.6 MB per minute, so an hour-long recording is around 635 MB — too big to email and slow to upload.

MP3 keeps only the sound you're most likely to hear and drops the rest. At 192 kbps an MP3 takes about 1.44 MB per minute, and it plays on every phone, computer, car stereo and audio app.

Keep the WAV as your master copy. MP3 is lossy, so do your editing on the WAV and make the MP3 at the end.

Common reasons to convert WAV to MP3:

  • ›Emailing or messaging a recording that's too big as WAV
  • ›Uploading to a podcast host or site that asks for MP3
  • ›Putting music on a phone, USB stick or car stereo
  • ›Sharing a demo or voice note without sending hundreds of megabytes

Quality & file size: WAV to MP3

The MP3 is always 192 kbps, so its size depends only on the length of the audio — about 1.44 MB per minute. The sample rate and number of channels stay the same as the WAV.

How much smaller it gets depends on the WAV. In our 20-second tests: a CD-quality stereo WAV (3.5 MB) became 481 KB, about 7 times smaller; a 24-bit stereo WAV (5.3 MB) became 481 KB, 11 times smaller; a mono voice WAV (1.8 MB) became 481 KB, only 3.7 times smaller.

MP3 is lossy. At 192 kbps most music and speech sounds very close to the WAV, but some detail is gone for good — which is why you keep the WAV.

The free tier takes WAV files up to 10 MB — about one minute of CD-quality stereo. Pro takes files up to 500 MB, about 49 minutes.

Frequently asked questions

How much smaller will the MP3 be?
It depends on the WAV. A CD-quality stereo WAV shrinks about 7 times, a 24-bit stereo WAV about 11 times, and a mono WAV only about 3.7 times — because the MP3 is always 192 kbps.
Can I choose the MP3 bitrate?
Not yet. Every MP3 is made at 192 kbps, a good middle ground for music and speech. If you need 128 kbps or 320 kbps, use a desktop audio editor for now.
How do I convert a WAV file to MP3 in Windows 11?
Open this page in Edge or Chrome, drop the WAV, and the MP3 downloads a few seconds later. There's nothing to install.
How do I convert WAV to MP3 on a Mac?
Drop the WAV on this page, or use Apple's Music app: choose Music > Settings > Files > Import Settings, set Import Using to MP3 Encoder, then select the song and choose File > Convert > Create MP3 Version.
Will converting WAV to MP3 lower the quality?
A little. MP3 removes sound detail to make the file small. At 192 kbps it sounds very close to the WAV for most music and speech, but you can't get the lost detail back — keep the WAV.
Why is my mono recording only a bit smaller as MP3?
Because the MP3 is always 192 kbps. A mono WAV is already half the size of a stereo one, so the MP3 is only about 3.7 times smaller. That's plenty of quality for a voice recording.
How long a WAV can I convert for free?
The free tier takes files up to 10 MB — about one minute of CD-quality stereo WAV. Pro takes files up to 500 MB, about 49 minutes.

Your WAV file never leaves this tab — FormatDrop has no endpoint that receives file data. How it works