ICO to SUN for Image Workflows
Fast, instant ICO to SUN conversion. No signup required. Just drop your .ico file and get .sun in seconds.
Batch Settings
图标文件（ICO）在Windows系统中历史悠久，是桌面快捷方式和程序界面的常见选择。然而，当您需要将这些精巧的图标用于跨平台开发、专业图形处理，或是集成到某些特定的图像编辑流程中时，转换为SUN Raster格式（.sun）便显得尤为重要。SUN格式因其在Unix和早期图形工作站中的广泛应用，至今仍是许多专业软件和系统兼容性的基石。我们深知在不同格式间转换的痛点，尤其是在追求图像精度和兼容性时。本工具旨在为您提供一个高效、精准的ICO到SUN转换方案，无论是老项目维护，还是新平台适配，都能助您一臂之力，让您的图标在不同环境中焕发新生。
- 游戏素材跨平台适配
- 旧版图形工作站项目兼容
- 专业图像处理流程整合
在中国大陆及周边地区，虽然ICO格式更为常见，但在涉及早期Unix系统或某些特定工业控制软件的兼容性需求时，SUN格式转换仍有其不可替代的价值，尤其是在一些遗产系统维护和数据迁移项目中。
About ICO to SUN Conversion
Whether you're one of the many photographers, designers, and content creators who work with ICO files daily, there comes a time when you need SUN instead. ICO is the icon format used for website favicons and Windows application icons.
Here's a typical scenario: you receive a .ico file but your project, platform, or client requires .sun. SUN is a widely used file format. Rather than searching for desktop software or wrestling with command-line tools, you can convert ICO to SUN online in seconds with CocoConvert.
This conversion is ideal when you When you need a SUN file. The conversion helps you convert between formats quickly.
Converting ICO to SUN maintains high quality with CocoConvert's optimised encoder settings.
Behind the scenes, CocoConvert uses industry-standard tools — FFmpeg for audio and video, Sharp for images, qpdf for documents. Your file is uploaded securely (TLS encryption), processed on isolated servers in Germany, and auto-deleted within 24 hours. No account, no watermark, no hidden fees.
Power users can batch convert up to 100 files simultaneously with a Pro subscription, making it practical for production workflows.
How to Convert ICO to SUN
- 1
Drop your file
Drag your .ico file onto the converter. Need to process many files? Add up to 5 at once (100 for Pro).
- 2
Set output to SUN
Pick SUN from the format list. The converter automatically tunes settings for the ICO→SUN pair.
- 3
Hit Convert
Processing happens server-side — your browser stays responsive. Most image files convert in under 10 seconds.
- 4
Download and use
Your .sun file is ready to plug into your workflow. Download it or share the link (expires in 24 hours).
What Happens When You Convert ICO to SUN
Your ICO file is decoded and re-encoded as SUN.
Your ICO 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
ICO
.ico file
| Extension | .ico |
| MIME Type | image/x-icon |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert ICO to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Who needs to convert ICO to SUN?
This conversion is commonly used by photographers, designers, and content creators. Typical reasons include convert between formats quickly and ensuring compatibility with downstream tools or platforms.
Can I convert ICO to SUN without losing quality?
Converting ICO to SUN maintains high quality with CocoConvert's optimised encoder settings.
Do I need to install software to convert ICO to SUN?
No. CocoConvert runs entirely in your browser — no downloads, no plugins. It works on macOS, Windows, Linux, iOS, and Android.
How many ICO files can I convert at once?
Free users can convert up to 5 files per hour. Pro subscribers get 100 files per hour with larger size limits (5 GB per file). Business API users can integrate batch conversion directly into their tools.
Is there an API for ICO to SUN conversion?
Yes. CocoConvert offers a Business API for automated conversions. It supports all the same format pairs available in the web interface, including ICO to SUN.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.