MP3 to WAV
Free online converter
Drop an MP3. Get a 16-bit/44.1 kHz PCM WAV ready for audio editing software. No watermark, no email.
Drop your .mp3 file
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Max 25 MB · .mp3 only
How it works
Drop the MP3
Drag the MP3 into the box. Files up to 25 MB anonymously, 60 MB after signup.
ffmpeg decodes to PCM
16-bit PCM, 44.1 kHz, source channel layout preserved. A few seconds for a typical file.
Download the WAV
The WAV file is about ten times larger than the MP3 because it is uncompressed. Wiped from our servers within the hour.
Why convert MP3 to WAV
Audio editors prefer WAV
Audacity, Adobe Audition, Logic, Pro Tools — they all open MP3 but most operations (precise editing, applying effects, normalising) work better on WAV. Converting first avoids the slight quality loss of repeated MP3 encodes.
No additional quality loss on edits
Each MP3 re-encode degrades audio slightly. Convert to WAV, do your edits, export back to MP3 at the end — that single round-trip is the best you can do.
Required by some legacy hardware and software
Some old CD burning software, samplers, and recording gear only read WAV. Conversion is the bridge.
Forensic and broadcast use
Forensic audio analysis and broadcast workflows traditionally use WAV because the format is well-understood and uncompressed. MP3 is acceptable for source material but WAV is the working format.
No watermark, no upsell
Just decoded audio in a WAV container. We add nothing.
When you would convert MP3 to WAV
Editing audio in Audacity, Reaper, Logic
Convert to WAV first, then apply effects, cut, normalise, mix. Re-export to MP3 at the end if you need a small distribution file.
Mastering for vinyl or CD
Vinyl cutting and CD pressing both want lossless audio. If your only source is MP3, converting to WAV gives the mastering engineer something they can work with — though the audio quality is bounded by the MP3 source.
Sample preparation for a sampler
Hardware samplers (Akai, Korg) often want WAV files at specific bit depths and sample rates.
Voiceover work for a video
Some video editors (DaVinci, Premiere) handle MP3 fine but show better waveforms and apply effects more cleanly on WAV.
Forensic or transcription analysis
Some specialised analysis tools require WAV input.
Tips for MP3 to WAV conversion
- 1
WAV will be 10x the size of the MP3
A 5 MB MP3 expands to roughly 50 MB as 16-bit/44.1 kHz WAV. The conversion does not restore lost quality — it just gives you a workable format.
- 2
WAV quality is capped by the MP3
You cannot make a 128 kbps MP3 sound like a CD by converting to WAV. The WAV just makes the existing audio editable without further compression loss.
- 3
For higher fidelity, ask for the original
If you are doing serious mastering or restoration, get the lossless original (WAV, FLAC, ALAC) from the source. MP3 → WAV is a workaround, not an upgrade.
- 4
Sample rate matters for hardware
Most hardware wants 44.1 kHz (CD) or 48 kHz (video). Our converter always outputs 44.1. If you need 48, open the WAV in Audacity and resample.
- 5
24-bit WAV — use Audacity
Our converter outputs 16-bit WAV. For 24-bit, open the resulting WAV in Audacity and re-export with 24-bit float. The extra bit depth gives editing headroom even though the source audio is just 16-bit equivalent.
- 6
Mono in, mono out — saves space
If your MP3 is mono, the WAV is mono too — half the size of a stereo conversion. We preserve the source channel layout.
Frequently asked questions
Is MP3 to WAV conversion really free?
Yes. No account up to 25 MB, no watermark, no time limit.
Why is the WAV so much bigger than the MP3?
MP3 uses perceptual compression to throw away audio data your ears barely notice. WAV stores every sample at full precision. A typical MP3 is one-tenth the size of the WAV equivalent.
Will the WAV sound better than the MP3?
No. The MP3 already lost data during its original encoding. WAV preserves the audio as-is — it does not restore quality.
What WAV format do you output?
16-bit PCM, 44.1 kHz, source channel layout preserved (mono in → mono out, stereo in → stereo out).
How long does it take?
Seconds. Decoding MP3 is fast.
Can I get 24-bit or 32-bit float WAV?
Not from this converter. Open our 16-bit WAV in Audacity and re-export with the bit depth you want — the extra bits give editing headroom even if the source audio precision is bounded by the MP3.
Do you keep my files?
No. Upload deleted after conversion. Output purged within the hour.
Can I batch convert?
Not yet on the free tier. Open multiple browser tabs.
What about 48 kHz sample rate?
We output 44.1 kHz (CD rate). For 48 kHz (video work), resample the WAV in Audacity after conversion.
Why bother converting at all?
Mostly for audio editing. Audacity, Pro Tools, Logic — they all work better on WAV than on MP3, especially for repeated edits.
Will the conversion fail for some MP3s?
Rarely. ffmpeg decodes essentially every standard MP3. A genuinely corrupted file might fail; otherwise it is reliable.
Should I keep both files?
For editing, work in WAV. For distribution, keep the MP3 too. Once editing is done, re-export from WAV to a fresh MP3 at the end of the chain.
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