MP3 to WAV Converter – Free Online

How to Convert MP3 to WAV Online

Upload your MP3 file

Drag and drop your .mp3 file onto the page or click to browse. You can select several MP3 files at once to batch-convert them.

WAV is preselected

The output format is already set to WAV, so you can convert immediately. If you need to, adjust the audio codec, bitrate or sample rate in the settings panel first.

Convert and download

Click Convert. The WAV file is processed on your own device; nothing is uploaded to a server. When it finishes, click Download to save it (or Download all to get a batch as a ZIP).

Why Convert MP3 to WAV?

Many editing programs, samplers, phone systems and broadcast tools expect uncompressed WAV rather than MP3. Converting MP3 to WAV decodes the audio once so your software can work with plain PCM samples without repeatedly decoding a lossy file.

The WAV cannot restore detail the MP3 encoder discarded, but it does stop any further loss: every edit and export after this point stays lossless.

Private by design: your MP3 file is converted on your own device and never uploaded.
WAV preselected: the output format is already chosen, so it is a one-click conversion.
Batch friendly: convert several MP3 files in one go and download them as a ZIP.
No limits, no watermark: free for files of any size, with nothing stamped on the output.

MP3 vs WAV

MP3 (MPEG-1 Audio Layer III): MP3 is the universal lossy audio format. It plays on every device made in the last twenty-five years and offers small files with good quality at 192 to 320 kbps. It is best for music players, podcasts, phones and sharing.

WAV (Waveform Audio File Format): WAV stores uncompressed PCM audio exactly as it was recorded. It is the standard for audio editing, mastering and archiving, at the cost of large files (about 10 MB per minute of CD-quality stereo). It is best for editing, mastering, DAWs and archiving.

In short: keep MP3 when the priority is music players, podcasts, phones and sharing, and switch to WAV when the file is headed for editing, mastering, DAWs and archiving. Need a different target? The full Audio Converter supports every format listed below.

MP3 to WAV FAQ

Does MP3 to WAV improve sound quality?

No. The WAV contains exactly the audio that was in the MP3. It prevents additional loss during editing but cannot recover what was already removed.

How large will the WAV be?

About 10 MB per minute for 44.1 kHz stereo, regardless of the MP3's bitrate.

Is this MP3 to WAV converter free?

Yes. Converting MP3 to WAV on MediaConverter.io is completely free, with no watermark, no sign-up and no daily conversion limit.

Are my MP3 files uploaded to a server?

No. The converter runs inside your browser using WebAssembly and WebCodecs, so your .mp3 file is read and converted on your own device. Nothing is uploaded, which keeps private recordings private and means there is no waiting in an upload queue.

Is there a file size limit for MP3 to WAV?

No fixed limit. Because processing happens locally, the practical limit is your computer's memory and patience; multi-gigabyte MP3 files convert fine on a desktop browser. Very large files take longer on phones.

Which browsers support the MP3 to WAV converter?

Current versions of Chrome, Edge, Firefox and Safari on desktop all work. Chrome and Edge are fastest because they expose hardware-accelerated WebCodecs decoders.