SUN to ICO — Format Comparison & Online Converter
Fast, instant SUN to ICO conversion. No signup required. Just drop your .sun file and get .ico in seconds.
Batch Settings
About SUN to ICO Conversion
SUN and ICO (introduced 1985) are both image formats, but they differ in important ways. SUN is a widely used file format. ICO is the icon format used for website favicons and Windows application icons.
When you convert SUN to ICO, the goal is to convert between formats quickly. Converting SUN to ICO maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your SUN file is decoded and re-encoded as ICO. The conversion involves 4 steps: (1) your sun file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in ico format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a ICO file. For the opposite direction, CocoConvert also supports ICO to SUN conversion.
How to Convert SUN to ICO
- 1
Upload .sun file
Select your SUN file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .ico
Set ICO as the output format. The converter uses optimal settings based on the SUN→ICO conversion profile.
- 3
Convert
The server-side engine decodes your SUN file and re-encodes it as ICO. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .ico file. Multiple output files can be downloaded together.
What Happens When You Convert SUN to ICO
Your SUN file is decoded and re-encoded as ICO.
Your SUN file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in ICO format
The converted file is ready for download
Format Comparison
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
ICO
.ico file
| Extension | .ico |
| MIME Type | image/x-icon |
| Category | Image |
Should You Convert SUN to ICO?
When to Convert
- ✓When you need a ICO file
Frequently Asked Questions
What is the difference between SUN and ICO?
SUN is a widely used file format. ICO is the icon format used for website favicons and Windows application icons.
Does SUN to ICO conversion affect quality?
Converting SUN to ICO maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, SUN or ICO?
SUN is a common image format. ICO uses lossless compression. The better choice depends on whether you prioritize file size or quality.
How long does SUN to ICO conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is SUN or ICO better for long-term storage?
ICO is better for archival since it preserves all original data.
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