raster format

What is a .SGI file?

SGI is Silicon Graphics' native image format from its Unix workstations, used widely in early film effects and 3D rendering.

Full name
Silicon Graphics Image
Developed by
Silicon Graphics
Released
1988
Extension
.sgi
MIME type
image/sgi
Transparency
Varies

How to open a SGI file

SGI opens in GIMP, ImageMagick and SGI-era tools; convert to PNG/TIFF for modern use.

What SGI files are used for

Photos & web images

Share, post and embed pictures across sites and apps.

Editing & design

Work with the format in editors like Photoshop and GIMP.

Storage & archiving

Keep memories and assets in a widely-readable form.

Strengths & limitations

✔ Strengths✖ Limitations
Excellent compatibilityNo transparency support
Limited support — may need converting

Need more than a conversion?

Remove the background from SGI images, upscale to 4K, or generate new visuals with SharkFoto AI.

Frequently asked questions

SGI is Silicon Graphics' native image format from its Unix workstations, used widely in early film effects and 3D rendering.

SGI opens in GIMP, ImageMagick and SGI-era tools; convert to PNG/TIFF for modern use.

SGI is optimised for its specific use rather than strictly lossless storage.

Use SharkFoto's free tools — upload your SGI file and convert it to a more convenient format in seconds. It's free, processed securely and never stored.

No — SGI doesn't store transparency; convert to PNG or WEBP if you need it.