Is my audio file uploaded anywhere?

No. The entire conversion runs inside your browser using the Web Audio API and the lamejs encoder. Your file is read from local memory and never sent to any server.

What bitrate should I choose?

128 kbps is a good balance of quality and file size for most content. Use 192 kbps or 320 kbps for music where fidelity matters. 64 kbps is fine for spoken-word recordings and podcasts.

Does converting WAV to MP3 degrade quality?

Yes. MP3 is a lossy format, so some audio data is discarded during encoding. The higher the bitrate you choose, the less quality is lost. WAV is lossless, so the source itself is perfect — only the MP3 output is lossy.

What WAV formats are supported?

Any WAV file that your browser can decode via the Web Audio API is supported — typically 8-bit or 16-bit PCM, mono or stereo, at standard sample rates (8 kHz to 96 kHz). Compressed WAV variants (like GSM or ADPCM) may not decode in all browsers.

How large a WAV file can I convert?

There is no hard limit in the tool, but very large files (over ~300 MB) may be slow because the entire decoded PCM buffer must fit in browser memory before encoding starts. Most typical WAV files convert in a few seconds.

WAV to MP3 Audio Converter

Drop a WAV file and download an MP3 copy — all encoding happens in your browser with lamejs, nothing is uploaded.

Select WAV File

Drop WAV here or click to browse Supports .wav files

Output MP3 Bitrate

Bitrate Guide

64 kbpsVoice, podcasts, speech

128 kbpsGeneral purpose (recommended)

192 kbpsHigh-quality music

320 kbpsMaximum fidelity

Converted MP3 file will appear here

Done!

Summary

Drop a WAV file and download an MP3 copy — all encoding happens in your browser with lamejs, nothing is uploaded.

How it works

Click the drop zone or drag a WAV file onto it.
Choose an output bitrate (128 kbps is recommended for most content).
Click "Convert to MP3" — the browser decodes the WAV via the Web Audio API.
lamejs encodes the raw PCM samples into an MP3 Blob in memory.
A download button appears — click it to save the MP3 file to your device.
All processing is local; your file is never sent to any server.

Use cases

Compress large WAV recordings for sharing via email or messaging apps.
Prepare audio clips for platforms that require MP3 input.
Reduce file size of recorded voice memos or field recordings.
Convert DAW exports to MP3 before uploading to podcast hosts.
Archive uncompressed WAV masters while distributing lighter MP3 copies.
Convert game or app audio assets to MP3 for smaller bundles.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu