AU Won't Open? Convert to GSRT Instantly
Fast, instant AU to GSRT conversion. No signup required. Just drop your .au file and get .gsrt in seconds.
Batch Settings
大切な音声ファイル、AU形式で保存されていませんか？ それをビジネス文書や漫画のセリフ、あるいは縦書き原稿にも最適なGSRT形式へ変換するお手伝いをいたします。AU形式は古くから使われる音声フォーマットですが、現代の多様なメディア環境、特にテキストベースのコンテンツ制作においては、GSRTのような汎用性の高い形式への変換が不可欠です。当社の変換ツールは、複雑な設定なしに、大切な音声データをスムーズかつ正確にGSRT形式へ移行させます。これにより、音声データから文字情報を効率的に抽出し、編集、共有することが可能になります。日本のコンテンツ制作現場で培われた細やかなニーズにも対応できるよう、使いやすさと信頼性を追求しました。
- 漫画のキャラクターボイスのスクリプト化
- ビジネス会議の議事録作成
- 縦書き小説の朗読原稿作成
GSRTはテキストベースのフォーマットであるため、特に縦書き文化が根強い日本では、音声認識後の文字起こしデータ整理に重宝されます。フォントの指定やルビの追加など、きめ細やかな編集が後工程で容易になる点が評価されています。
About AU to GSRT 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 GSRT. GSRT 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 GSRT 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 GSRT 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 GSRT
- 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 GSRT output
Select .gsrt 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 .gsrt file. For batch jobs, download all at once as a zip.
What Happens When You Convert AU to GSRT
Your AU file is decoded and re-encoded as GSRT.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in GSRT format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
GSRT
.gsrt file
| Extension | .gsrt |
| MIME Type | audio/x-gsrt |
| Category | Audio |
Should You Convert AU to GSRT?
When to Convert
- ✓When you need a GSRT 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 GSRT — a more widely supported format — usually resolves this. GSRT is a widely used file format.
Is it safe to convert AU to GSRT 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 GSRT?
Converting AU to GSRT 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 GSRT 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.