AU Won't Open? Convert to MP2 Instantly
Fast, instant AU to MP2 conversion. No signup required. Just drop your .au file and get .mp2 in seconds.
Batch Settings
Vous avez des fichiers audio au format AU et souhaitez les convertir en MP2 ? Que ce soit pour archiver des enregistrements sonores historiques, optimiser des bandes-son pour la diffusion radiophonique ou simplement adapter d'anciens contenus multimédias à des plateformes plus modernes, la conversion d'AU vers MP2 est une étape technique courante. Le format AU, souvent associé aux systèmes Unix et NeXT, est robuste mais moins universellement pris en charge que le MP2, un codec audio compressé privilégié pour la diffusion et les applications de télévision numérique. Notre outil est conçu pour faciliter cette transition, assurant une fidélité audio optimale tout en rendant vos fichiers compatibles avec un éventail plus large de logiciels et de dispositifs. Simplifiez vos flux de travail et modernisez votre bibliothèque audio en quelques clics, sans compromettre la qualité sonore de vos précieuses archives.
- Archivage de documents sonores officiels
- Optimisation pour diffusion DAB+
- Intégration dans des projets multimédias
En France, en Belgique et au Québec, le format MP2 a longtemps été un standard pour la radiodiffusion numérique (notamment le DAB/DAB+), ce qui rend cette conversion pertinente pour les professionnels des médias souhaitant adapter d'anciens fonds sonores.
About AU to MP2 Conversion
Dealing with a AU file that won't open on your device? You're not alone — AU compatibility issues are one of the most common reasons people search for a file converter. AU is a widely used file format.
The fix is simple: convert your AU to MP2. MP2 is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting AU to MP2 maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your AU file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a MP2 file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert AU to MP2
- 1
Add your AU file
Drag and drop your .au file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick MP2 output
Select .mp2 as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The audio engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .mp2 file. For batch jobs, download all at once as a zip.
What Happens When You Convert AU to MP2
Your AU file is decoded and re-encoded as MP2.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in MP2 format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
MP2
.mp2 file
| Extension | .mp2 |
| MIME Type | audio/mpeg |
| Category | Audio |
Should You Convert AU to MP2?
When to Convert
- ✓When you need a MP2 file
Frequently Asked Questions
Why won't my AU file open?
AU files may not open if your device lacks the right codec or application. Converting to MP2 — a more widely supported format — usually resolves this. MP2 is a widely used file format.
Is it safe to convert AU to MP2 online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting AU to MP2?
Converting AU to MP2 maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my AU file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert AU to MP2 on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.