How to Convert WAV to MP3 in Your Browser
Add your WAV file
Drag a .wav file onto the upload area or click Choose WAV File to pick one from your device. The file loads directly into the page using the browser Web Audio API and is processed on your device.
Set the bitrate
Use the bitrate slider to choose a value between 64 and 320 kbps. Lower values produce smaller files for speech, while 192 kbps or higher keeps music sounding close to the original.
Convert and download
Click Convert to MP3. The tool decodes and re-encodes the audio in real time, so processing takes roughly as long as the clip plays. When it finishes, compare the original and output sizes, then click Download.
Bitrate Settings Compared
The bitrate slider is the only quality control, and it directly trades file size against audio detail. Use this guide to pick a setting for your source material. Sizes are approximate for a 3-minute clip.
| Bitrate | Best for | Relative size | Audible quality |
|---|---|---|---|
| 64 kbps | Voice memos, low-priority speech | Smallest | Noticeable loss on music |
| 96 kbps | Podcasts, audiobooks | Very small | Fine for spoken word |
| 128 kbps | General speech and casual music | Small | Good for most listeners |
| 192 kbps | All-purpose music, recommended default | Moderate | Transparent for most ears |
| 256 kbps | Quality-focused music | Larger | Very close to source |
| 320 kbps | Archival-grade compressed music | Largest compressed | Near indistinguishable |
Is This Tool Right for Your Job
Shrinking a single WAV
Ideal. Drop one PCM WAV in, pick a bitrate, and download a much smaller compressed file in seconds without installing software or signing up.
Working with private audio
A strong fit. The conversion runs entirely in your browser through the Web Audio API and MediaRecorder, so the file stays on your device and is never sent to a server.
Needing strict MP3 with tags
Use the full Audio Converter instead. This page uses the browser MediaRecorder, which encodes Opus audio in a WebM container saved with an .mp3 extension rather than a true MP3 stream with ID3 tags.
Batch or exotic WAV files
Look elsewhere. The tool handles one standard PCM WAV at a time. Multi-file jobs and unusual variants such as ADPCM or GSM are better suited to the FFmpeg-based Audio Converter.
Common Problems and Fixes
Failed to decode audio
This usually means the file is not a standard PCM WAV, or it is corrupted. Re-export the audio as a regular PCM WAV from your recorder or editor, then try again. Compressed WAV variants are not supported by the browser decoder.
Conversion feels slow on long files
The browser plays back and records the audio in real time, so a 5-minute clip takes about 5 minutes to process. Keep the tab open and active, and split very long recordings before converting if you need faster turnaround.
The downloaded file will not open as MP3 in some apps
The output is Opus audio in a WebM container saved with an .mp3 extension. Most modern players handle it, but if a strict app rejects it, use the full Audio Converter to produce a true MP3 file.
Output is barely smaller than the original
You likely chose a high bitrate such as 320 kbps. Move the slider down toward 128 or 96 kbps to cut the size further, accepting some reduction in fidelity for non-critical audio.