Quick answer: To convert WAV to MP3, add the file, pick a bitrate and click Convert. An MP3 at 192 kbps is about 1.4 MB per minute, compared with roughly 10 MB per minute for CD-quality WAV. The conversion happens in your browser and nothing is uploaded.
How to use the WAV to MP3 Converter
- Add your WAV file (up to 50 MB).
- Select a bitrate: 64, 128, 192 or 320 kbps.
- Click Convert and download the MP3 when it is ready.
About WAV to MP3 conversion
WAV usually stores uncompressed audio, which is why recordings from microphones, audio interfaces and editing software are so large. MP3 compresses the sound by removing detail that is hard to hear, so the same recording takes a fraction of the space and is easy to email, upload or play on any device. Converting creates a new MP3 and leaves your WAV untouched, so keep the WAV if you may edit or master the audio again.
How much smaller will the file be?
CD-quality stereo WAV (44.1 kHz, 16-bit) needs about 10 MB for every minute of audio. The MP3 sizes below are the bitrate arithmetic, so your result will be close to them.
| Format | Best for | Approx. size per minute |
|---|---|---|
| WAV (CD quality) | Editing and archiving | 10 MB |
| MP3 320 kbps | Highest MP3 quality | 2.4 MB |
| MP3 192 kbps | Music with good quality (default) | 1.4 MB |
| MP3 128 kbps | Podcasts and everyday listening | 1.0 MB |
| MP3 64 kbps | Voice notes and lectures | 0.5 MB |
Which bitrate should I choose?
For music, use 192 kbps or 320 kbps. For podcasts, interviews and voice-overs, 128 kbps is a sensible balance, and 64 kbps is enough for speech you only need to understand. The MP3 is always encoded at 44.1 kHz. A WAV recorded at 24-bit or 48 kHz is accepted and converted down to that format.
A note on file size limits
Each file can be up to 50 MB. Because WAV is so large, 50 MB holds only about four to five minutes of CD-quality stereo audio. For a longer recording, export it from your editing software in shorter sections or as a compressed format first, then convert it here.
Tips for the best result
- Convert from the original recording, not from another MP3, to avoid stacking lossy compression.
- Normalize or edit the audio before converting. An MP3 cannot be improved afterwards.
- Keep the WAV as your master copy and use the MP3 for sharing.
Private by design
The conversion runs inside your browser. Your audio file is not uploaded to FormatVolt or any other server. The first time you convert, your browser downloads the converter engine (about 30 MB). It is then stored in your browser cache, so later conversions start faster. Conversion speed depends on your device and the length of the file. Keep the tab open until the conversion finishes.
Frequently asked questions
How do I convert WAV to MP3?
Add your WAV file, choose a bitrate, click Convert, then download the MP3.
How much smaller is an MP3 than a WAV?
CD-quality WAV is about 10 MB per minute. An MP3 at 192 kbps is about 1.4 MB per minute, roughly seven times smaller.
Will I lose quality?
Yes, a little. MP3 is lossy. At 192 kbps or higher the difference is hard to hear for most people, but keep your WAV if you may edit the audio later.
Is there a file size limit?
Yes. Each file can be up to 50 MB, which is roughly four to five minutes of CD-quality stereo WAV.
Does it work on a phone?
Yes, in modern mobile browsers. Large files may be slow on older phones, and you should keep the tab open until the conversion finishes.
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Last updated: November 10, 2026