SUN to FITS for Image Workflows
Fast, instant SUN to FITS conversion. No signup required. Just drop your .sun file and get .fits in seconds.
Batch Settings
About SUN to FITS Conversion
Whether you're one of the many photographers, designers, and content creators who work with SUN files daily, there comes a time when you need FITS instead. SUN is a widely used file format.
Here's a typical scenario: you receive a .sun file but your project, platform, or client requires .fits. FITS is a widely used file format. Rather than searching for desktop software or wrestling with command-line tools, you can convert SUN to FITS online in seconds with CocoConvert.
This conversion is ideal when you When you need a FITS file. The conversion helps you convert between formats quickly.
Converting SUN to FITS 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 SUN to FITS
- 1
Drop your file
Drag your .sun file onto the converter. Need to process many files? Add up to 5 at once (100 for Pro).
- 2
Set output to FITS
Pick FITS from the format list. The converter automatically tunes settings for the SUN→FITS 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 .fits file is ready to plug into your workflow. Download it or share the link (expires in 24 hours).
What Happens When You Convert SUN to FITS
Your SUN file is decoded and re-encoded as FITS.
Your SUN file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in FITS format
The converted file is ready for download
Format Comparison
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
FITS
.fits file
| Extension | .fits |
| MIME Type | image/fits |
| Category | Image |
Should You Convert SUN to FITS?
When to Convert
- ✓When you need a FITS file
Frequently Asked Questions
Who needs to convert SUN to FITS?
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 SUN to FITS without losing quality?
Converting SUN to FITS maintains high quality with CocoConvert's optimised encoder settings.
Do I need to install software to convert SUN to FITS?
No. CocoConvert runs entirely in your browser — no downloads, no plugins. It works on macOS, Windows, Linux, iOS, and Android.
How many SUN 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 SUN to FITS conversion?
Yes. CocoConvert offers a Business API for automated conversions. It supports all the same format pairs available in the web interface, including SUN to FITS.
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