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How to Convert MP3 to WAV Online

Convert MP3 audio files to uncompressed WAV format in your browser. Free, private, no file upload required.

WAV (Waveform Audio File Format) is the industry standard for uncompressed audio. Music producers, audio engineers, and podcasters often need WAV files for editing in professional DAWs like Ableton, Pro Tools, or Logic Pro, which handle uncompressed audio more reliably.

ConvertCraft's Audio Converter transforms MP3 to WAV entirely in your browser using FFmpeg compiled to WebAssembly. Your audio files are processed locally — nothing is uploaded to any server.

To convert: open the Audio Converter tool, drop your MP3 file, select WAV as the output format, choose your preferred sample rate and bit depth (16-bit/44.1kHz CD quality is the default), and click Convert.

While converting from lossy MP3 to lossless WAV does not magically restore lost audio data, it provides the uncompressed format required by many professional tools and workflows. The output WAV file will be larger than the MP3 source.

Batch conversion is supported — convert an entire album or podcast season in one operation. The tool handles files up to 500MB and preserves ID3 metadata tags (artist, title, album) when possible.

Open Audio Converter →

Frequently Asked Questions

Does converting MP3 to WAV improve audio quality?

No. MP3 is a lossy format, and the lost audio data cannot be recovered. Converting to WAV gives you an uncompressed file for editing purposes, but the audio content remains the same quality as the MP3 source.

How much larger is a WAV file compared to MP3?

A WAV file is typically 5-10 times larger than the equivalent MP3. A 5MB MP3 file will produce roughly a 30-50MB WAV file at CD quality (16-bit/44.1kHz).

Can I choose the sample rate for the WAV output?

Yes. The Audio Converter offers sample rate options including 22.05kHz, 44.1kHz (CD quality), 48kHz (video standard), and 96kHz (high-resolution audio).