How to Convert PSB to SUN — Quick & Free
Fast, instant PSB to SUN conversion. No signup required. Just drop your .psb file and get .sun in seconds.
Batch Settings
在图像处理的世界里，文件格式的转换是家常便饭。您手头有精细的PSB大文件，可能是Photoshop处理的巨幅海报、复杂的图层稿，或是游戏开发中的高分辨率贴图，现在需要将它转换成SUN格式。SUN（Sun Rasterfile）作为一种历史悠久的位图格式，在某些特定系统或旧版软件中依然保持着其不可替代的地位。无论是为了兼容特定的图形工作站，还是满足某些专业软件的导入需求，亦或是出于数据归档的目的，将PSB转换为SUN格式，能帮助您顺利打通不同平台间的壁垒。我们的在线工具致力于提供高效、稳定的转换服务，让您的PSB大文件轻松适配SUN环境，确保图像数据完整无损。
- 大型游戏素材跨平台适配
- 老旧工业设计软件兼容性
- 学术研究数据归档与互通
在中国大陆及周边区域，虽然SUN格式日常使用不多，但在一些历史遗留项目或特定工业自动化领域，偶尔仍会遇到需要处理此类文件的场景，尤其是在与国际老牌系统对接时。
About PSB to SUN Conversion
Short answer: yes, you can convert PSB to SUN online for free, and quality is well preserved with the right settings. Just upload your .psb file to CocoConvert, pick SUN as the output, and click Convert. The whole process takes seconds.
Now for the details. PSB is a widely used file format. SUN is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your PSB file is decoded and re-encoded as SUN. Converting PSB to SUN maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert PSB to SUN
- 1
1. Upload PSB
Drop your .psb file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select SUN
Choose .sun from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .sun file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert PSB to SUN
Your PSB file is decoded and re-encoded as SUN.
Your PSB 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
PSB
.psb file
| Extension | .psb |
| MIME Type | image/vnd.adobe.photoshop |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert PSB to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Is PSB to SUN conversion free?
Yes. CocoConvert offers free PSB to SUN conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is PSB to SUN conversion?
Most files convert in 2–10 seconds depending on size. Large image files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded PSB file and the converted SUN file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting PSB to SUN lose quality?
Converting PSB to SUN maintains high quality with CocoConvert's optimised encoder settings.
Can I convert SUN back to PSB?
Yes, CocoConvert supports SUN to PSB conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.