CUR Won't Open? Convert to SUN Instantly
Fast, instant CUR to SUN conversion. No signup required. Just drop your .cur file and get .sun in seconds.
Batch Settings
日頃より、デジタル画像ファイルの変換についてお悩みではありませんか？特に、WindowsのカーソルファイルであるCUR形式を、Sun Microsystemsが開発した高機能なラスター画像形式であるSUN形式へ変換するニーズは、特定の専門分野で意外と多いものです。このページでは、お客様の大切な画像を、品質を損なうことなくスムーズに、そして確実にCURからSUNへと変換するお手伝いをいたします。マンガ制作の現場で、あるいはビジネス文書の挿絵として、さらには組版における細やかなフォント表現にこだわる方々にとって、正確なファイル変換は作業の効率化と品質向上に直結します。当社の変換ツールは、そうした日本のクリエイターやビジネスパーソンの皆様の期待に応えるべく、細部にわたって配慮して設計されています。使いやすさを追求しつつ、変換後のファイルの整合性も保証いたしますので、どうぞ安心してお試しください。
- マンガ原稿の素材変換
- 企業内システムでのアイコン統一
- 縦書きDTPでの画像最適化
日本のデザイン業界では、DTPにおけるフォントの扱いや、縦書き組版での画像配置に高い品質が求められるため、CURからSUNへの高精度な変換が特に重要視されることがあります。
About CUR to SUN Conversion
Dealing with a CUR file that won't open on your device? You're not alone — CUR compatibility issues are one of the most common reasons people search for a file converter. CUR is a widely used file format.
The fix is simple: convert your CUR to SUN. SUN 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 CUR to SUN maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your CUR 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 SUN 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 CUR to SUN
- 1
Add your CUR file
Drag and drop your .cur file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick SUN output
Select .sun as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The image engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .sun file. For batch jobs, download all at once as a zip.
What Happens When You Convert CUR to SUN
Your CUR file is decoded and re-encoded as SUN.
Your CUR file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SUN format
The converted file is ready for download
Format Comparison
CUR
.cur file
| Extension | .cur |
| MIME Type | image/x-icon |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert CUR to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Why won't my CUR file open?
CUR files may not open if your device lacks the right codec or application. Converting to SUN — a more widely supported format — usually resolves this. SUN is a widely used file format.
Is it safe to convert CUR to SUN 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 CUR to SUN?
Converting CUR to SUN 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 CUR 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 CUR to SUN 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.