Convert MP3 to WAV online for free
- 100% local in your browser
- No Uploads
- Nothing gets saved
- No Ads
Drop audio files here or click to select. Then click Convert.
Source (Auto-detect)
You can select multiple formats at once and convert them all to a single target format.
Target
▶ Options MP3, 320 kbps, CBR
Format & Quality
Auto keeps the channel count of the source file.
Volume & Effects
dB
May cause clipping at high values.
Reverse audio
Plays the output backwards.
0 disables the effect.
0 disables the effect.
Advanced
Only use this if you know what you're doing.
Downloads
0%
Conversion runs locally in your browser.
-
by
Fabian
- last edited: 29.06.2026
Fehlersuche
- Datei wird nicht angezeigt. Stelle sicher, dass es sich um eine echte MP3 Datei handelt und nicht nur die Dateiendung geändert wurde. Unterstützt wird das MP3 Format.
- Mehrere Dateien werden nicht übernommen. Du kannst mehrere MP3 Dateien gleichzeitig auswählen oder per Drag and Drop hinzufügen. Wenn nichts passiert, lade die Seite neu und versuche es erneut.
- Konvertierung startet nicht. Prüfe, ob JavaScript im Browser aktiviert ist. Teste die Seite gegebenenfalls in einem aktuellen Browser wie Chrome, Edge oder Safari.
- Fortschritt bleibt stehen. Die Umwandlung läuft komplett lokal im Browser. Bei längeren MP3 Aufnahmen kann das etwas Zeit in Anspruch nehmen, da die resultierende WAV Datei deutlich größer ist. Warte, bis die Verarbeitung abgeschlossen ist.
- 100 Prozent erreicht, aber kein Download möglich. Prüfe, ob dein Browser Downloads blockiert. Deaktiviere gegebenenfalls Popup oder Download Blocker und lade die Seite neu.
- Alle WAV Files herunterladen erscheint nicht. Der Button wird nur angezeigt, wenn mindestens zwei Dateien erfolgreich konvertiert wurden.
- WAV Datei ist sehr groß. WAV ist unkomprimiert. Die resultierende Datei ist daher deutlich größer als die ursprüngliche MP3 Datei. Das ist technisch korrekt und kein Fehler.
- Datei kann nicht dekodiert werden. Die MP3 Datei könnte beschädigt sein oder ein ungewöhnliches Format enthalten. Exportiere die Datei erneut aus deiner ursprünglichen Quelle oder verwende eine andere MP3 Datei.
- Konvertierung bricht auf mobilen Geräten ab. Die Seite muss im Vordergrund bleiben, bis die Umwandlung abgeschlossen ist. Bei App Wechsel oder gesperrtem Bildschirm kann der Prozess pausieren.
- Kein Download auf iPhone oder iPad. Tippe länger auf den Download Button und wähle In Dateien sichern. Im privaten Modus können Downloads blockiert sein.
- WAV klingt nicht besser als MP3. Das ist technisch korrekt. Die WAV Datei enthält nach der Konvertierung exakt dieselbe Audioqualität wie das MP3 Original. Eine Qualitätsverbesserung ist durch die Konvertierung nicht möglich.
- Browser reagiert langsam. Die resultierende WAV Datei kann bei längeren Aufnahmen viel Arbeitsspeicher benötigen. Verwende nach Möglichkeit einen Desktop Browser für lange MP3 Dateien.
- Datei wird konvertiert, aber erscheint nicht in der Liste. Lade die Seite neu und füge die Datei erneut hinzu. Achte darauf, dass der Upload vollständig abgeschlossen ist, bevor du auf Konvertieren klickst.
Want to convert an MP3 file to WAV?
With our online MP3 to WAV converter, you can quickly and securely convert compressed MP3 files to uncompressed WAV files. The entire process takes place directly in your browser. Your audio data never leaves your device.
Ideal for software that cannot read MP3 files.
PLEASE NOTE! Converting to an uncompressed WAV format does not improve the quality of the source! The quality of your MP3 file will not improve.
Convert WAV to MP3 Online: Here's How It Works
Our Browser MP3 to WAV Converter converts compressed MP3 files into the uncompressed WAV format. This conversion runs without any upload. Your files are processed using built-in browser features. No audio data ever reaches our server. Your files stay on your device at all times. The tool is 100% free. You can convert multiple files one after another with no upload or conversion limits.
Perfect if your software, your DAW, or a client requires WAV as the input format and you only have an MP3 file available.
How to convert MP3 to WAV:
- Select your MP3 file
- Start the conversion
- Download your WAV file directly
What this conversion does and what it doesn't do
This is the most important section on this page.
MP3 is a lossy format. During the original compression, frequency content was permanently removed because the human ear barely perceives it. This process cannot be reversed.
What converting to WAV actually means: the MP3 audio data is transferred into an uncompressed PCM container. The audio quality stays exactly the same as the MP3 original, it does not get better or worse. The file size, however, increases significantly, since WAV uses no compression at all.
In short: you get a larger file with the same audio quality as the original MP3.
When this conversion still makes sense:
- Your DAW or editing software does not accept MP3 as an input format
- Older hardware or broadcast systems require WAV
- You want a unified file format across an entire project
- A mastering studio or client requires WAV as the delivery format
MP3 vs WAV Compared
| Property | MP3 | WAV |
|---|---|---|
| Compression | Lossy compression | Uncompressed |
| File size | Small | Very large |
| Audio quality after conversion | Depends on original bitrate | Identical to the MP3 original |
| Typical use | Streaming, sharing, websites | DAW, production, broadcast |
| Compatibility | Nearly universal | Very high, especially professional |
| Recommendation | For distribution and sharing | When WAV is required as input |
Why convert MP3 to WAV?
WAV is the preferred format in professional audio environments. It stores audio uncompressed in PCM format and is supported by nearly every DAW, editing program, and broadcast system. Unlike converting WAV to MP3, this conversion is not about reducing file size, it is purely about compatibility.
Common reasons for converting:
- Your DAW or editing software does not accept MP3 as an input format
- Older hardware or broadcast systems require WAV
- You want a unified file format across all project files
- A client or mastering studio requires WAV as the delivery format
- Better compatibility with professional audio workflows
Why use our converter?
Many online converters upload your files to external servers. This is an unnecessary risk for unreleased music projects or confidential recordings.
Our tool works differently:
- No upload to external servers
- No storage of your files
- No sharing of audio data
- Full control over your content
Technical details to MP3 to WAV Conversion
Supported input formats: MP3
Output format: WAV
Processing: locally in the browser
Compatible with: Windows, macOS, Linux, iOS, Android
The conversion converts the MP3 audio data to the uncompressed PCM format, which is stored in the WAV container. The original MP3 quality is fully preserved.
Need to convert other formats?
Check out our Audio Converter for more options including WAV to MP3, FLAC to MP3, AAC to MP3, and MP4 to MP3. Also free, no ads, and no file size limits.
Frequently asked questions about MP3 to WAV
Does the conversion improve the sound quality of my MP3 file?
No. MP3 is a lossy format. The frequency content removed during compression cannot be restored. The WAV file contains exactly the same audio quality as the MP3 original, just in a different container.
Why is the WAV file so much larger after conversion?
WAV stores audio uncompressed in PCM format. While MP3 produces very small files through compression, WAV contains all audio data without reduction. The file size increases significantly without any gain in quality.
When does MP3 to WAV make sense?
Whenever your software, your DAW, or a client requires WAV as the input format and you only have an MP3 file available.
Are my files stored on a server?
No. All processing happens locally in your browser. Your files never leave your device.
Is there a file size limit?
Since no uploads take place, there is no server-side limit. The maximum file size depends only on your device.
Can I convert multiple MP3 files at once?
Yes. You can convert multiple files one after another.
Does the converter work on smartphones?
Yes. The tool runs on modern browsers on Windows, macOS, Linux, iOS, and Android.
This might also interest you:
The Best USB Microphones Compared
The Best Wireless Microphones Compared
Links marked with * are affiliate links. There are no additional costs for you, some of these links are with an automatic discount for you. We mark these links for transparency and would never recommend bad products. Find out more here: Our partners.
Our Services
