Convert
Turn MP3s into editor-ready WAV files
Convert MP3 files into uncompressed PCM WAV files that audio editors and samplers accept, locally.
For the best results: WAV output is uncompressed, so files grow roughly eight-fold, a 4 MB MP3 becomes about 30 MB. That is normal, and exactly what samplers and editors want: no decode step, no generation loss during edits.
Advanced settingsoptional, defaults work well
Converted entirely in your browser, your files are never uploaded. Very large files depend on your device's memory.
What is MP3 to WAV?
MP3 to WAV is a free file converter that expands MP3 files into uncompressed 16-bit PCM WAV files that audio editors, samplers and DAWs accept natively, converted locally. The audio is converted by an ffmpeg engine that runs inside your browser, so your recordings never leave your device. No upload, no queue, and no account, and once the engine has loaded it works even offline.
- ✦Runs entirely in your browser. Nothing you enter is ever uploaded
- ✦No account, no sign-up, and no data leaves your device
- ✦Works offline once the page has loaded
See it in action
An audio editor plugin refuses compressed input and wants raw WAV.
What you drop in
track.mp3
What you get
track.wav in uncompressed 16-bit PCM, exactly the source duration in testing, sized at roughly 10 MB per minute of stereo.
Tip: Converting to WAV does not restore quality the MP3 already discarded, it just unpacks what is there into a format editors can process losslessly from that point on.
Use cases
What people use it for
Feed MP3 source material into a DAW or editor that behaves best with uncompressed input.
Prepare tracks as PCM WAV files for burning a standard audio CD.
Convert MP3 sound effects to WAV so a video timeline scrubs and cuts them cleanly.
Who uses MP3 to WAV?
Video editors
convert MP3 music and effects into WAV so their editing timeline scrubs smoothly and renders without codec quirks
Wedding DJs
prepare requested songs as WAV files for gear and burning software that insists on uncompressed audio
Audio restoration hobbyists
expand old MP3 recordings into WAV before applying noise reduction and repair tools that need raw samples
How it works
- 1Choose your files. They open in your browser, not on a server.
- 2Your device converts, compresses, or resizes them locally, with no upload.
- 3The converted files download straight back; nothing is kept anywhere.
Tips for the best results
- Convert to WAV before editing, do your processing, and only re-compress once at the end.
- Budget for size, since an album of MP3s can balloon roughly tenfold as WAV.
- For CD burning, keep the standard 44100 Hz output your burner expects.
- Delete intermediate WAVs after a project wraps and keep the compact MP3 plus the final export.
- On memory-limited devices, convert long files one at a time rather than as a batch.
FAQ
Frequently asked questions
What does the WAV output actually contain?
The tool decodes your MP3 into raw PCM: a stream of 16-bit amplitude samples, thousands per second per channel, wrapped in a simple WAV header describing the sample rate and channel count. That structure is the closest digital audio gets to a plain list of numbers, which is exactly why editing and mastering software finds it so easy to work with.
Does converting to WAV bring back the quality MP3 removed?
No, and understanding why saves disappointment. The MP3 encoder permanently deleted the audio detail it deemed inaudible, so decoding to WAV simply writes out the surviving sound in uncompressed form. Think of it as photocopying a cropped photograph onto larger paper: the frame grows, but the missing scenery does not return.
Why is the WAV so many times bigger than my MP3?
Because PCM spells out every single sample while MP3 stores a compact perceptual summary. Uncompressed CD-quality stereo consumes about ten megabytes a minute regardless of what the audio contains, so even silence costs full price. The size increase is the point: editors want predictable raw data, not a compressed stream they must unpack on every operation.
What is the difference between sample rate, bit depth, and bitrate?
Sample rate is how many measurements are taken per second, commonly 44100; bit depth, here 16-bit, is how precisely each measurement is stored; together they define a WAV's fidelity. Bitrate belongs to compressed formats and describes data spent per second after compression. WAV quality is fixed by its recipe, which is why WAV files have no quality slider.
Is anything about my files sent over the internet?
Nothing whatsoever. Decoding runs inside the page through a WebAssembly build of ffmpeg, so the MP3 is expanded into WAV within your browser's own memory space and delivered straight back as a download. Session recordings and works in progress stay yours alone, with no upload to intercept and no third-party retention policy to squint at.
Why would anyone convert MP3 to WAV?
Compatibility with tools, not quality. CD burning requires PCM, many editors and samplers handle uncompressed audio far more gracefully, and processing a WAV repeatedly costs nothing, whereas re-saving an MP3 degrades it each generation. Converting once to WAV at the start of an editing job avoids stacking lossy encodes.
Is a WAV file always lossless?
The WAV made here is uncompressed PCM, so from this point on nothing further is lost no matter how often you copy or edit it. But lossless describes the container's honesty, not its history: a WAV decoded from an MP3 faithfully preserves the MP3's sound, including everything that compression already took.
Is this an AI tool?
No. It performs a fixed mathematical decode, the same one every MP3 player runs, and writes the result as WAV; identical input always yields an identical output file. Nothing is enhanced, guessed, or sent to a remote model, which makes it fast, dependable, and completely private by construction.
Are there any usage limits?
None. Everything is generated locally in your browser, so there is no server cost, no metering, and no daily cap, use it as many times as you like, completely free.
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