WAV to MP3 Converter
Convert WAV audio to compressed MP3. Choose bitrate. Free, private, browser-based.
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WAV to MP3 Converter Features
Fast, private WAV to MP3 conversion in your browser.
Standard PCM WAV files in mono and stereo are fully supported.
Choose from 64 to 320 kbps to balance file size and audio quality.
Your audio never leaves your device. 100% private conversion.
How to Convert Files
Upload your files, select output format, and download converted files instantly. Our converter supports batch conversion and maintains high quality.
Frequently Asked Questions
How much smaller is MP3 than WAV?
At 192 kbps, an MP3 is roughly 8x smaller than a WAV at CD quality (44100 Hz, 16-bit, stereo).
A typical 3-minute song at 30MB as WAV becomes approximately 3-4MB as MP3.
The exact reduction depends on the bitrate you choose and the audio content.
What bitrate should I choose?
128 kbps is suitable for speech, podcasts, and audiobooks where file size matters more than audio quality.
192 kbps is the recommended all-purpose setting — great quality and significantly smaller than WAV.
320 kbps is for music enthusiasts who want near-CD quality in a compressed format.
Does compression affect audio quality?
Yes. MP3 compression is lossy — it permanently removes some audio information to reduce file size.
At 192 kbps and above, the quality loss is typically inaudible to most listeners in everyday listening conditions.
For archiving original recordings, always keep the uncompressed WAV version.
Is my data sent to a server?
No. Conversion uses the browser's built-in Web Audio API and MediaRecorder, entirely on your device.
Your audio files never leave your device. This is safe even for private or copyrighted audio.
We do not store, log, or transmit any audio you convert.
What is the exact output format?
The browser's MediaRecorder API encodes audio using Opus codec in a WebM container, which downloads with a standard audio file extension.
For true MP3 encoding from a browser, a native binary encoder would be needed. Our tool uses the browser's best available compressed format.
For guaranteed MP3 format with ID3 tags, use our full Audio Converter which uses FFmpeg.
Can I convert large WAV files?
Yes, though large files take more time. A 30MB WAV typically takes 30-60 seconds to process.
The browser processes the audio in real time, so conversion takes roughly as long as the audio duration.
For batch conversion of many large files, use our full Audio Converter tool.
Does it support stereo audio?
Yes. Both mono and stereo WAV files are fully supported.
The output preserves the original channel layout.
Stereo audio files will be converted as stereo.
Can I convert MP3 to WAV?
Yes — use our MP3 to WAV Converter for the reverse conversion.
Converting back to WAV will not improve quality — it creates a larger lossless copy of the compressed audio.
For all audio format conversions use our full Audio Converter tool.