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Free local audio converter — no uploads

MP3 to WAV Converter — Free, Local, No Upload

The short answer: Converting MP3 to WAV decodes the compressed audio and stores the result as uncompressed 16-bit PCM: a lossless container holding exactly the decoded samples. The file grows several times larger and gains nothing audible, so the real reasons to do it are workflow ones — a DAW, sampler, or editing app that demands WAV input, or burning audio to a format that reads PCM directly.

How to convert MP3 to WAV

Convert MP3 to WAV now

The button opens the Audio Converter with MP3 → WAV preselected — it runs entirely in your browser and nothing is uploaded.

Open Audio Converter

Local in your browser — nothing is uploaded

  1. Open the converter

    The button above opens the Audio Converter with the WAV output already selected.

  2. Drop your MP3 file

    Add the file (up to 200.0 MiB); the format is verified from its signature, not its name.

  3. Convert and download

    Press Convert; the ffmpeg audio engine (~31 MB) downloads on first use, then your file transcodes in a dedicated worker. Cancel stops the run cleanly.

Conversion facts

Input format
MP3
Output format
WAV
Max file size
200.0 MiB
Max output
200.0 MiB
Quality
Lossless — bitrate tiers ignored
Processing
Local in your browser — nothing is uploaded

MP3

MP3 → WAV

What to watch

The container is lossless but the audio is still the decoded MP3: conversion cannot restore the detail MP3 compression discarded, so the WAV is bigger, not better. Sample rate and channel count pass through as decoded. Outputs are capped at 200 MiB because PCM inflates fast — roughly 10 MB per minute at CD quality — and inputs at 200 MiB, with a 5-minute per-run watchdog. The ~31 MB conversion engine downloads on first use, then stays cached.

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  • The tool behind this page

    Audio Converter

    Convert MP3, WAV, M4A, OGG and FLAC audio between formats entirely in the browser with ffmpeg.wasm — no uploads. Inputs up to 200 MB with 96/128/192 kbps bitrate tiers for lossy output; OGG uses Opus and WAV/FLAC stay lossless.

Frequently asked questions

Will converting MP3 to WAV improve the audio quality?
No. WAV stores exactly what the MP3 decodes to — the conversion is lossless from that point on, but it cannot recover detail the MP3 encoder threw away. What you get is a universally editable master with no further quality loss, which is what editing apps and samplers actually need from the format.
Which bitrate should I choose for the WAV?
None — WAV is uncompressed PCM, so the bitrate tier selector stays visible but the encoder ignores it, and the workspace says so. The file size is determined by the decoded sample rate, channel count, and duration instead.
Are my audio files uploaded anywhere?
No. Decoding and encoding run in a WebAssembly build of ffmpeg inside your browser tab — the file never leaves your device, nothing is uploaded or stored on a server, and closing the tab discards everything.