WAV to MP3

WAV is what recorders, audio interfaces and many apps save: perfect sound, but around 10 MB for every minute of stereo. That is too big to email, slow to upload and a waste of phone space. MP3 keeps the sound sounding the same to most ears at a fraction of the size, and every phone, car and player can open it.

This page opens Audio Converter set to MP3 at 192 kbps, a good choice for both music and voice. Drop in one WAV or a whole folder of up to 50, press one button and each comes back as an MP3 with the same name, with its new size beside the old one so you can see what you saved.

You can still change everything: 128 kbps for smaller speech files, 320 kbps for the best MP3 can do, mono for a voice note, or “Normalise on convert” so every file plays at the same loudness. The MP3 encoder runs inside your browser, so your recordings are never uploaded.

1. Press “Choose files” or drag your WAV files onto the box. Each shows its length, sample rate and size.
2. The line above the tool confirms the job: MP3 at 192 kbps. Change “Quality” if you want smaller or better files.
3. Optional: tick “Normalise on convert”, or open “More options” for sample rate and mono or stereo.
4. Press “Convert to MP3”. Each row shows its progress, then the new size and how much smaller it is.
5. Tap a finished row to listen, then download files one by one or all together as a ZIP.

• Opens set to MP3 at 192 kbps; 64, 96, 128, 160, 256 and 320 kbps are a tap away.
• Converts up to 50 WAV files in one go, with the size before and after for each.
• Reads 16-bit, 24-bit and 32-bit float WAV, plus AIFF, FLAC and other formats if you have them too.
• Optional loudness normalising to −14 LUFS, −16 LUFS, −23 LUFS or a −1 dBFS peak.
• Sample rate and mono or stereo choices for smaller voice files.
• Listen to any converted file on the page before you download it.

• For speech, lectures and voice notes, 128 kbps mono is plenty and halves the size again.
• Keep your original WAVs if you will edit the audio later; MP3 is for listening and sharing.
• For a podcast, tick “Normalise on convert” and choose −16 LUFS, the usual podcast loudness.
• Converting an MP3 back to WAV makes it big again but cannot restore what MP3 left out.