AU Won't Open? Convert to FAP Instantly
Fast, instant AU to FAP conversion. No signup required. Just drop your .au file and get .fap in seconds.
Batch Settings
AU形式の音声ファイルをFAP形式へ変換する際、どのような場面でお困りでしょうか？例えば、お手持ちの古い音源を最新のビジネスプレゼンテーションに活用したい、あるいは、アニメーション制作で得た効果音を、より扱いやすい形式に統一したいとお考えかもしれません。当社の変換ツールは、そうした皆様のニーズに応えるべく開発されました。複雑な設定は一切不要。直感的な操作で、大切な音声データを迅速かつ正確に、目的のFAP形式へと変換いたします。音質の劣化を最小限に抑えつつ、スムーズなファイル変換を実現することで、皆様のクリエイティブな活動や業務効率の向上に貢献できることを願っております。さあ、今すぐお試しください。
- アニメ効果音の形式統一
- ビジネス会議録音のデータ管理
- 古い音源の現代的利用
日本では、特にアニメやゲーム制作において、多様な音声フォーマットが利用されます。AUからFAPへの変換は、既存のリソースを新しいプロジェクトで活用する際に有効です。
About AU to FAP 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 FAP. FAP 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 FAP 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 FAP 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 FAP
- 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 FAP output
Select .fap 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 .fap file. For batch jobs, download all at once as a zip.
What Happens When You Convert AU to FAP
Your AU file is decoded and re-encoded as FAP.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FAP format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
FAP
.fap file
| Extension | .fap |
| MIME Type | audio/x-fap |
| Category | Audio |
Should You Convert AU to FAP?
When to Convert
- ✓When you need a FAP 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 FAP — a more widely supported format — usually resolves this. FAP is a widely used file format.
Is it safe to convert AU to FAP 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 FAP?
Converting AU to FAP 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 FAP 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.