How to do it, step by step
- Select the WAV files.
- Choose the Bitrate: 128k for voice, 192k for general use, 256k or 320k for music.
- Click Convert all.
- Download the MP3s (one by one or with the Download all button).
When this is useful
Voice recordings and meetings
At 128 kbps the voice stays clear and the file fits in an email.
Songs and demos to send
At 256k or 320k the loss is hard to notice on most headphones.
Free up space on a phone or computer
One minute of stereo WAV takes about 10 MB; as 192k MP3, about 1.4 MB.
Tips for a good result
- For voice, converting to mono and using 128k reduces the size even more.
- Keep the original WAV if you will edit again: each new MP3 compression loses quality.
What this tool does not do
- MP3 uses lossy compression: the quality is never equal to the WAV’s.
- The app does not offer variable bitrate (VBR) or custom metadata.
- The new file carries the “WebFaz.com” credit in the metadata (comment and artist).
Frequently asked questions
- Which bitrate should I choose?
- 128 kbps for voice, 192 kbps for general use and 256 or 320 kbps for music with more quality.
- How much does the file shrink?
- In stereo at 192 kbps, from about 10 MB per minute (WAV) to about 1.4 MB per minute (MP3).
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Text written by Marcelo Amantino · updated October 18, 2026 · who we are