JBG to SUN — Format Comparison & Online Converter
Fast, instant JBG to SUN conversion. No signup required. Just drop your .jbg file and get .sun in seconds.
Batch Settings
About JBG to SUN Conversion
JBG and SUN are both image formats, but they differ in important ways. JBG is a widely used file format. SUN is a widely used file format.
When you convert JBG to SUN, the goal is to convert between formats quickly. Converting JBG to SUN maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your JBG file is decoded and re-encoded as SUN. The conversion involves 4 steps: (1) your jbg file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in sun 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 SUN file. For the opposite direction, CocoConvert also supports SUN to JBG conversion.
How to Convert JBG to SUN
- 1
Upload .jbg file
Select your JBG file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .sun
Set SUN as the output format. The converter uses optimal settings based on the JBG→SUN conversion profile.
- 3
Convert
The server-side engine decodes your JBG file and re-encodes it as SUN. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .sun file. Multiple output files can be downloaded together.
What Happens When You Convert JBG to SUN
Your JBG file is decoded and re-encoded as SUN.
Your JBG 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
JBG
.jbg file
| Extension | .jbg |
| MIME Type | image/x-jbig |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert JBG to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
What is the difference between JBG and SUN?
JBG is a widely used file format. SUN is a widely used file format.
Does JBG to SUN conversion affect quality?
Converting JBG to SUN maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, JBG or SUN?
JBG is a common image format. SUN is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does JBG to SUN 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 JBG or SUN better for long-term storage?
Both formats use lossy compression, so consider keeping your original source file for long-term storage.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.