SUN is a Sun Raster image - the native bitmap format of early Sun Microsystems workstations running SunOS. Sun Raster was a fixture of Unix workstations in the 1980s and 90s, which is why old graphics tools still list it among their formats. Analyser handles .SUN alongside related formats such as .ABC, .AFL, .ARX and more. In Analyser's format library, .SUN sits in the System & disk category.

How do I open a .SUN file?

Drop a .SUN file onto Analyser at https://lab.valjdakosta.com/ and it is identified directly in your browser - no upload, no account and no software to install. A catch-all for rare and niche formats Analyser still identifies from their bytes: 3D caches and scans (Alembic ABC, FARO FLS/FWS), camera and design data (ARRIRAW ARX, Capture One masks, CATIA CGR), JBIG codestreams, firmware dumps (Binwalk), draw.io diagrams, OptimFROG DualStream audio, RTTTL ringtones, LaTeX style and class files, Sun Raster and Truevision TGA images, MPEG-2 streams, PVR/DVB recordings, Tiled tilesets, Windows Prefetch and Reaper project backups.

Can I open a .SUN file online for free?

Yes. Analyser is a free online .SUN identifier that runs entirely in your browser - your .SUN file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.SUN file - what it is and how to identify it online

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Home › Formats › .SUNID

What is a .SUN file?

SUN is a Sun Raster image - the native bitmap format of early Sun Microsystems workstations running SunOS.

Did you know: Sun Raster was a fixture of Unix workstations in the 1980s and 90s, which is why old graphics tools still list it among their formats.
Analyser handles .SUN alongside related formats such as .ABC, .AFL, .ARX and more.
In Analyser's format library, .SUN sits in the System & disk category.
What Analyser reads: A catch-all for rare and niche formats Analyser still identifies from their bytes: 3D caches and scans (Alembic ABC, FARO FLS/FWS), camera and design data (ARRIRAW ARX, Capture One masks, CATIA CGR), JBIG codestreams, firmware dumps (Binwalk), draw.io diagrams, OptimFROG DualStream audio, RTTTL ringtones, LaTeX style and class files, Sun Raster and Truevision TGA images, MPEG-2 streams, PVR/DVB recordings, Tiled tilesets, Windows Prefetch and Reaper project backups.
Depth of analysis: .SUN is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
Open a .SUN file: Drag a .SUN file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .ABC · .AFL · .ARX · .BIE · .Binwalk · .CGR · .COMask · .DIO · .FLS · .FWS · .H2V · .OFS · .PF · .RPP-bak · .RTX · .STY · .CLS · .TP and more. See all supported file types.