AVIF Won't Open? Convert to SUN Instantly
Fast, instant AVIF to SUN conversion. No signup required. Just drop your .avif file and get .sun in seconds.
Batch Settings
还在为图片格式烦恼吗？AVIF作为新一代图像格式，以其出色的压缩效率和画质表现，正逐渐受到关注。但如果您的工作流或分享平台对它支持不佳，尤其是需要兼容一些特定老旧系统或嵌入式设备时，将AVIF转换为更通用的SUN格式（通常指Sun Rasterfile，在某些特定图形或工程领域仍有应用）就显得尤为必要。我们深知在日常使用中，流畅的格式转换能大大提升效率。本工具旨在为您提供一个简便、高效的解决方案，让您无需安装复杂软件，即可轻松完成AVIF到SUN的转换，确保您的图像文件能顺利适配各种应用场景，无论是专业图形处理还是特定系统兼容，都能得心应手。
- 工程设计软件兼容
- 旧版系统图形导入
- 特定硬件显示适配
尽管AVIF在跨平台分享（如微信）上已逐渐普及，但在一些特定工业或科研领域，Sun Rasterfile格式因其历史兼容性，仍可能作为数据交换或存档的标准，特别是在与一些较早期的UNIX或特定图形工作站交互时。
About AVIF to SUN Conversion
Dealing with a AVIF file that won't open on your device? You're not alone — AVIF compatibility issues are one of the most common reasons people search for a file converter. AVIF is the newest image format based on AV1 video codec, delivering exceptional compression — up to 50% smaller than JPEG at the same quality.
The fix is simple: convert your AVIF 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 AVIF to SUN maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your AVIF 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 AVIF to SUN
- 1
Add your AVIF file
Drag and drop your .avif 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 AVIF to SUN
Your AVIF file is decoded and re-encoded as SUN.
Your AVIF 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
AVIF
.avif file
| Extension | .avif |
| MIME Type | image/avif |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert AVIF to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Why won't my AVIF file open?
AVIF 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 AVIF 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 AVIF to SUN?
Converting AVIF 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 AVIF 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 AVIF 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.