MP3 to WAV Converter – Free, Fast & Private
Convert MP3 files to uncompressed WAV locally in your browser — nothing is uploaded
How to convert MP3 to WAV
Choose or drag in your MP3 file — nothing is uploaded, it stays on your device.
Conversion starts instantly — the audio is extracted and encoded to WAV right in your browser, with live progress.
Download your WAV file.
Everything happens right here in your browser: your file is converted locally on your device with WebAssembly FFmpeg and is never uploaded to any server. Because there is no upload, there is no practical length limit either — multi-hour recordings and files up to 8GB convert just fine, and even a huge file starts instantly. Read more: how in-browser conversion works →
About MP3 to WAV conversion
Audio editors, DAWs, samplers and many transcription pipelines want uncompressed PCM input. This tool decodes your MP3 to standard 16-bit WAV — the format every audio application on earth opens without plugins or questions.
The conversion runs on your own device with WebAssembly FFmpeg: drop the file, get the WAV. No upload, no signup, and files up to 8GB work fine.
Frequently asked questions
No — and any tool that claims otherwise is misleading you. WAV stores exactly what was decoded from the MP3; the compression loss already happened when the MP3 was made. What WAV gives you is a format editors and processing tools can work with losslessly from this point on.
Roughly 5–10× the MP3's size: WAV is uncompressed at about 10MB per minute for stereo CD-quality audio. That is the price of an editing-friendly format — convert back to MP3 when you're done editing.
Standard 16-bit PCM at the source's sample rate and channel count — the universal flavor that every DAW, editor, sampler and transcription tool accepts.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your recording never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing. For personal recordings, lectures and meetings this matters more than anywhere else.
Up to 8GB on desktop browsers and 2GB on mobile — big enough to pull the audio out of a multi-hour lecture or meeting recording. There is no limit on the number of files, no signup and no watermark.
Yes — completely free and unlimited, with no watermark, signup or daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
Decoding MP3 to PCM is one of the cheapest operations in audio — even hour-long files finish in seconds; the work is mostly just writing the larger file.