What is the difference between MP3 and WAV?

MP3 is a lossy audio format that discards detail the ear is least likely to notice, producing files roughly a tenth the size of WAV. Newer codecs are more efficient, but nothing matches MP3 for sheer playback compatibility. WAV stores uncompressed PCM audio — the raw samples, with nothing discarded. Quality is perfect and files are large: roughly 10MB per stereo minute at CD quality. It is the standard working format for recording and editing.

Will I lose anything converting MP3 to WAV?

Nothing further is lost, but nothing is recovered either. MP3 already discarded detail when it was first encoded, and that is gone for good. Converting to WAV preserves exactly what remains, in a much larger file.

Anything to watch out for with WAV?

WAV has no standard tagging scheme, so artist and album metadata often does not survive a conversion into it. The 4GB file-size ceiling comes from the 32-bit size field in the RIFF header; very long recordings need RF64 or a different container.

What bitrate should I use?

For music, 192kbps MP3 or 128kbps Opus is the point where most people stop hearing a difference from the source. For speech and podcasts you can go much lower — 96kbps MP3 or 64kbps Opus is transparent for voice. Going above 256kbps on a lossy codec mostly just makes the file bigger.

What should I know about starting from MP3?

MP3 has already discarded detail permanently, so nothing downstream can recover it. Converting is about compatibility or container, not quality. More broadly: MP3 is the format that made digital music portable, and thirty years on it is still the one that plays everywhere without question — car stereos, gym equipment, DJ software, hardware from the 2000s. Newer codecs beat it measurably at every bitrate.

When is WAV the right choice?

WAV suits: recording and editing, where repeated saves must not degrade quality; mastering sources and archival; short samples where size is irrelevant. It is the wrong choice when sharing, streaming or storing large libraries.

Is there a file size limit?

No hard limit — the constraint is your browser's memory. Files under 50MB convert in a few seconds. Larger files work but take longer, and a browser tab typically has 250-500MB to play with, so very large batches are better split into smaller groups.

Does this work on mobile?

Yes. The drop zone falls back to your phone's file picker, and the conversion runs on-device exactly as it does on desktop. Large files are slower on a phone because there is less CPU and memory available, but nothing about the workflow changes.

Convert MP3 to WAV

Convert MP3 to uncompressed WAV for editing, sampling or any tool that needs raw PCM. Free, in your browser, no upload.

Drop audio files to convert

WAV, MP3, M4A (AAC), AAC, OGG, Opus, FLAC

Files stay on your device. Open DevTools' Network tab to verify.

MP3/AAC/Opus and decoding compressed input use browser WebCodecs; available in modern browsers only.

Overview

Why convert MP3 to WAV

This does not restore quality. MP3 already discarded detail permanently, and WAV will faithfully preserve whatever is left — at a much larger file size. Convert this direction only when a tool downstream requires WAV specifically.

Comparison

MP3 vs WAV: what actually differs

MP3 compared with WAV across encoding, fidelity, file size and support.
Attribute	MP3	WAV
Full name	MPEG-1 Audio Layer III	Waveform Audio File Format
Encoding	Binary	Binary
Fidelity	Lossy — detail is permanently discarded	Lossless — bit-for-bit original samples
Typical size	About 1MB per minute at 128kbps; 1.5MB at 192kbps	Very large — about 10MB per stereo minute at 44.1kHz/16-bit
Support	Universal, including hardware too old for anything newer.	Universal. Every operating system, editor and player reads WAV.

How to

How to convert MP3 to WAV

01
Drop your MP3 file
Drag one or more MP3 files onto the drop zone above, or click to browse. Files stay on your device — there is no upload step.
02
Convert to WAV
convert.now parses the MP3 and writes it out as WAV in a Web Worker, so the page stays responsive even on large files. Nothing is sent anywhere.
03
Download the result
Download the WAV file, or a zip of all of them for a batch. Filenames are preserved, with the extension changed to .wav.

Why here

Why convert.now

Private
Files stay in your browser. No upload step. Nothing for anyone to see.
Fast
No queue, no upload wait. Conversion starts the moment you drop a file.
Free
No ads. No file-count limit. No sign-up wall. Just the converter.

FAQ

MP3 to WAV: common questions

No. The MP3 to WAV conversion runs entirely in your browser. Files never leave your device, and there is no server involved in the conversion at all. Open DevTools' Network tab and run a conversion if you want to confirm it — you will see the page and its code load, and no request carrying your file.

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Last updated 27 August 2026

Why convert MP3 to WAV

MP3 vs WAV: what actually differs

How to convert MP3 to WAV

Drop your MP3 file

Convert to WAV

Download the result

Why convert.now

MP3 to WAV: common questions

Related MP3 converters