AU Won't Open? Convert to 3GP Instantly
Fast, instant AU to 3GP conversion. No signup required. Just drop your .au file and get .3gp in seconds.
Batch Settings
Die Konvertierung von Audioformaten ist im professionellen Umfeld, insbesondere in datensensiblen Bereichen wie Ingenieurwesen und CAD, oft eine Notwendigkeit. Wenn Sie vor der Herausforderung stehen, Ihre AU-Audiodateien in das universell kompatiblere 3GP-Format zu überführen, bieten wir eine zuverlässige Lösung. Dies ist besonders relevant, wenn es darum geht, technische Dokumentationen mit Audioinhalten zu ergänzen oder Sprachnotizen effizient für die mobile Nutzung aufzubereiten, ohne dabei Kompromisse bei der Datenintegrität oder der Einhaltung regionaler Datenschutzstandards eingehen zu müssen. Unser Konverter wurde mit Blick auf Präzision und Benutzerfreundlichkeit entwickelt, um Ihnen einen reibungslosen Übergang zwischen diesen Formaten zu ermöglichen. So stellen Sie sicher, dass Ihre Inhalte plattformübergreifend zugänglich und verwertbar bleiben, was die Zusammenarbeit und den Informationsaustausch erheblich erleichtert.
- Vertonung technischer Zeichnungen
- Audio-Protokolle für Baustellen
- Sprachnotizen für Feldmessungen
In Deutschland, Österreich und der Schweiz ist die Nutzung von 3GP im Geschäftskontext oft an die Kompatibilität mit älteren Mobilfunknetzen oder spezifischen Endgeräten gebunden, die noch in Betrieb sind, um eine breite Zugänglichkeit zu gewährleisten.
About AU to 3GP 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 3GP. 3GP is a mobile video format designed for small file sizes on cellular networks. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting AU to 3GP 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 3GP 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 3GP
- 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 3GP output
Select .3gp 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 .3gp file. For batch jobs, download all at once as a zip.
What Happens When You Convert AU to 3GP
Your AU file is decoded and re-encoded as 3GP.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in 3GP format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
3GP
.3gp file
| Extension | .3gp |
| MIME Type | video/3gpp |
| Category | Audio |
Should You Convert AU to 3GP?
When to Convert
- ✓When you need a 3GP 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 3GP — a more widely supported format — usually resolves this. 3GP is a mobile video format designed for small file sizes on cellular networks.
Is it safe to convert AU to 3GP 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 3GP?
Converting AU to 3GP 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 3GP 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.