Shrink big WAV recordings into MP3 files that play everywhere, right in your browser - then cut them with the MP3 Cutter or join them with Merge MP3.
Recorded one long session? Cut it into parts afterwards with the MP3 Cutter.
WAV stores audio uncompressed.
Every minute of CD-quality stereo takes about 10 MB.
An MP3 at 192 kbps sounds the same to most listeners at about a seventh of the size. That makes it easy to email, upload, or copy to a phone or a USB stick for the car.
Keep the WAV for editing and share the MP3. Want to glue several takes together first? Use Merge WAV.
| WAV | MP3 | |
|---|---|---|
| Compression | None (PCM) | Lossy |
| Size per minute | About 10 MB (CD quality) | About 1.4 MB at 192 kbps |
| Quality | Exact copy of the recording | Very close at 192 kbps and up |
| Tags | Limited (RIFF INFO) | ID3: title, artist, album, year |
| Plays on | Computers, most players | Everything |
| Best for | Recording, editing, mastering | Sharing, phones, cars |
Need a test file? Grab one from the WAV sample files.
Before converting, the page shows the size the bitrate gives (marked with ~). After converting, it shows the real, measured size.
Your audio is decoded and encoded on your own device. MP3 encoding by LAME (LGPL).
Drop your WAV files into the box, pick a preset such as Standard, and press Convert to MP3.
One file downloads as an MP3, more than two come as a ZIP.
No. Your browser decodes the WAV and the LAME encoder writes the MP3 on your device.
Nothing is sent to us, so private recordings stay private.
192 kbps is the sweet spot for music - most people cannot hear a difference from the WAV. Use 320 kbps for archiving, or 96 kbps mono for speech and podcasts.
MP3 is lossy, so a little detail is removed - mostly sounds people cannot hear. At 192 kbps and above, it is very hard to tell the two apart.
Keep your WAV if you plan to edit the audio again.
Yes. Drag the start and end handles on the waveform, or open Trim start and end and type the times. Press Play source to hear the part you keep.
For more cuts, use the MP3 Cutter afterwards.
A CD-quality WAV uses about 10 MB per minute. At 192 kbps the MP3 is roughly 85% smaller, at 128 kbps about 90% smaller.
After converting, the page shows the exact size of every MP3.
Yes. 8, 16, 24 and 32-bit WAV, float WAV and u-law or A-law telephone recordings all work. Rates above 48 kHz are resampled, because MP3 stops at 48 kHz.
Up to 50 WAV files per batch, up to 300 MB each. More than two MP3s come as one ZIP, and your recent conversions stay in this browser for downloading again.