PNG vs SUN — Comparison & Free Converter
Fast, instant PNG to SUN conversion. No signup required. Just drop your .png file and get .sun in seconds.
Batch Settings
Bienvenue sur notre outil de conversion PNG vers SUN, une passerelle essentielle pour les professionnels et les institutions francophones. Le format PNG, omniprésent pour sa compression sans perte et son support de la transparence, est idéal pour le web et l'édition. Cependant, dans certains contextes techniques ou patrimoniaux, le format SUN Raster (fichiers .ras ou .sun) demeure une spécification incontournable, notamment pour sa compatibilité avec des systèmes UNIX ou des applications graphiques spécialisées plus anciennes. Notre convertisseur a été conçu pour assurer une transition fluide et précise de vos images, préservant l'intégrité visuelle et les métadonnées essentielles. Que vous travailliez sur des archives numériques, des projets de recherche ou des développements logiciels, cet outil vous garantit une interopérabilité sans faille, répondant aux exigences spécifiques de divers secteurs d'activité en France, en Belgique, en Suisse et au Québec.
- Archivage de documents techniques
- Compatibilité avec logiciels universitaires (géomatique, imagerie)
- Migration de données graphiques héritées
Dans les administrations et certaines universités francophones, notamment en Suisse et au Québec, le format SUN Raster est encore rencontré pour des jeux de données géospatiales ou des images issues de scanners industriels spécifiques. Cette conversion est donc cruciale pour l'intégration dans des chaînes de traitement modernes ou la consultation sur des plateformes actualisées.
About PNG to SUN Conversion
PNG or SUN — which format should you use? The answer depends on your needs. Here's a quick breakdown.
PNG uses lossless compression and supports transparency, making it perfect for graphics, logos, and screenshots. It has universal platform support. SUN is a widely used file format. It has common platform support.
So when should you convert PNG to SUN? This conversion is ideal when you When you need a SUN file. This conversion helps you convert between formats quickly.
Converting PNG to SUN maintains high quality with CocoConvert's optimised encoder settings.
If you've decided SUN is the right choice, CocoConvert makes the conversion effortless. Upload your .png file, pick SUN, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert PNG to SUN
- 1
Choose your PNG file
Upload your .png file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to SUN
Select .sun from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large image files.
- 4
Get your SUN file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert PNG to SUN
Your PNG file is decoded and re-encoded as SUN.
Your PNG 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
PNG
.png file
| Extension | .png |
| MIME Type | image/png |
| Category | Image |
SUN
.sun file
| Extension | .sun |
| MIME Type | image/x-sun-raster |
| Category | Image |
Should You Convert PNG to SUN?
When to Convert
- ✓When you need a SUN file
Frequently Asked Questions
Should I use PNG or SUN?
It depends on your goal. PNG preserves full quality. SUN preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is SUN higher quality than PNG?
Not necessarily. Converting PNG to SUN maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert PNG to SUN on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for PNG to SUN?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for PNG to SUN?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.