MP3 to WAV, for tools that insist.
Audio editors, DAW templates, IVR systems, broadcast pipelines and a surprising number of speech tools want WAV in — either because they process raw PCM or because they were written before MP3 licensing settled. This page decodes your MP3 and rebuilds it as a clean 16-bit PCM WAV, on your device.
Add your files
Drag files here, or press the button. Any common audio works — and videos too: we take just the sound out of an MP4 or MOV. Your files stay on your device the whole time.
MP3 · M4A · WAV · FLAC · Ogg · Opus · MP4 · MOV — even old AMR and WMA files. You can also paste a file from the clipboard.
Pick the format you want
Not sure? MP3 is the safe answer — it plays on everything.
Advanced options — quality, mono/stereo, volume+
The defaults are good — you can skip this whole box.
Mono halves the size — fine for voice.
Your privacy — live proof, not a promise
- Files uploaded
- 0 bytes
- Processing
- Not started yet
- Your files
- Stay in this browser tab — gone when it closes
- Converter engine
- Not downloaded — only fetched if a format needs it
One download, and it isn’t your audio
Converting to MP3 or WAV needs no download at all. Less common formats use a built-in converter engine (32.5 MB) that comes from this site — not from some other company — downloads once, and is then saved in your browser. Your audio is never part of that download: the engine comes to your files, your files don’t go to it.
Don’t take our word for it: open your browser’s DevTools, watch the Network tab, then convert a file. You’ll see nothing carrying your audio — because this page has no upload feature at all. There is nowhere for your file to go.
Scope note, so this stays exact: the claim is about your files — they never leave this device. The site around it is not claim-free. It loads Vercel Analytics for aggregate page traffic, plus Google Analytics and Ads tags if you accept the consent prompt. Those measure page visits and store-link clicks. They never receive your audio, because nothing does. Full privacy policy.
Converted files are never stored by this page — they exist only in this tab until you download them.
Shrinking, not just converting?
If the point is a smaller file — an attachment cap, a full phone — the free audio compressor solves backwards from a target size and lets you A/B the quality before you commit.
Convert, then transcribe
Need the words, not the audio? The free audio to text tool transcribes the same files on your device — no conversion step needed for anything a browser can decode. Or capture something new with the free online voice recorder.
What this conversion does and doesn't do
Decoding an MP3 to WAV unpacks it into raw samples — it does not restore the quality MP3 encoding discarded. The WAV will sound identical to the MP3, occupy about ten times the space, and that is the correct outcome: the point is a format tools accept and can process sample-by-sample, not better audio.
Why editors and pipelines want WAV anyway
Editing lossy audio directly means re-encoding on every save, stacking loss on loss. Editors that unpack to PCM once, edit losslessly, and let you choose the final export format avoid that — which is why serious tools either convert internally or ask you to hand them WAV in the first place. Handing them WAV yourself also sidesteps the tools whose MP3 import is simply broken.
The fastest conversion on this site
There is no encoder in this path at all: the browser decodes the MP3 and the WAV writer just lays the samples into a RIFF header — the same WAV encoder our voice recorder uses for its exports. Even long files finish in seconds, and it works entirely offline.
How the conversion works
The same four steps whatever you drop in — none of them involve a server. The free online audio converter hub explains the whole pipeline, the format chooser and the comparison with upload-based converters.
Your browser opens the file itself
Drop a file in, and your browser reads it with the same built-in player it uses to play sound on any website. Videos work too — we take just the sound out of an MP4 or MOV and leave the picture alone. At this point nothing has left your device, and nothing will.
Your device does the converting
For MP3 and WAV, a small converter runs right here in this tab. For less common formats — Opus, Ogg, FLAC, M4A, or old files like AMR and WMA — a bigger converter engine (ffmpeg, ~32 MB) downloads once from this site and then also runs on your device. Either way, the work happens on your computer or phone, not on a server.
Trim and tidy before converting
You can cut silence off the start and end, make the sound louder, and choose the quality — all before the file is converted, so it is only converted once. Hidden info inside the file (like when and where it was recorded) is removed automatically, because a file you are about to share should not quietly carry that.
Download straight from this tab
The finished file is built in this tab and handed to you as a normal download — one at a time, or a whole batch bundled into a single ZIP. Close the tab and everything in it is gone. There is no account and no cloud copy, because there is no cloud.
MP3 to WAV — questions, answered
Does converting MP3 to WAV improve the sound quality?+
No — nothing can restore what MP3 encoding discarded. The WAV sounds exactly like the MP3, in a container that editors and processing tools accept. If someone promises 'quality restoration' in this direction, they are selling something.
What WAV format does this produce?+
Standard RIFF/WAVE with 16-bit little-endian PCM — the format effectively everything accepts, from Audacity to broadcast systems. Mono or stereo and the sample rate follow the source unless you override them in the settings.
Why is the WAV so much bigger than my MP3?+
Because WAV is uncompressed: every sample is stored raw at about 1.4 megabits per second in 16-bit stereo at 44.1 kHz. Ten-to-one growth over a 128 kbps MP3 is normal and expected — size is the price of a format tools can process directly.
Is this audio converter really free, with no limits?+
Yes. No account, no daily limit, no file-size tier and no watermark. Your own device does the converting, so an extra file costs us nothing — there is simply nothing for us to charge for or to cap.
Is my audio uploaded anywhere?+
No. The file is opened and converted inside your browser, on your device. This feature has no upload button behind the scenes — there is nowhere for your audio to go. Want proof? Open your browser's DevTools, watch the Network tab while you convert, and you'll see nothing carrying your audio.
What is the maximum file size?+
We don't set one. The real limit is your device's memory, because the whole file is handled in this tab. Files over 2 GB are refused, and if a file looks heavy for your device, the page warns you before starting. A laptop handles multi-hour recordings; a phone prefers shorter ones.
Does it work offline?+
Converting to MP3 or WAV works offline once the page is open. Other formats (Opus, Ogg, FLAC, M4A) need the bigger converter engine, which downloads once (~32 MB) from this site — after that it's saved in your browser, so those conversions work without re-downloading too.
Can I convert video files to audio?+
Yes. Drop in an MP4, MOV or WebM video and you get just the sound out of it — that's the whole 'MP4 to MP3' trick. The video itself is never uploaded or changed; only its audio is read.
Why is there no 'paste a link' option?+
Because this tool is for your files, from your device. A link box would turn it into a tool for downloading other people's audio from around the web, which is not what it's for — and every link would send someone's listening history through a converter. Local files only, on purpose.
What does 'remove hidden info' actually remove?+
Details stored invisibly inside the file: title, artist, album art, the exact time it was recorded, which app or phone recorded it, and sometimes even GPS location. It's removed by default because a file you're about to share shouldn't quietly tell people all that. Turn the option off and the details are kept instead.
Other conversions
Files worth converting start as recordings.
BlackBox records your day straight to compact, transcribed, searchable files on your phone — nothing to convert afterwards. Free on iPhone and Android.