Free online AVIF→SGI converter. Fast, private, no sign-up.
If something is asking you for a SGI file and all you have is a AVIF, this page is the fix. Drop in your AVIF file (a .avif) and download a ready-to-use SGI file (a .sgi) — no software to install, no account to create, and no watermark on the output.
AVIF, based on the AV1 codec, delivers the smallest files of the mainstream formats at a given quality, with transparency and HDR — at the cost of slower encoding and slightly less universal support than WebP.
SGI is an image format. Converting to or from it lets you use the same picture in apps and on platforms that expect a different format.
The usual reason to convert AVIF to SGI is file size or quality: SGI fits the job better, whether that means a smaller download, a cleaner edit, or broader support. Under the hood the conversion runs on libvips and ImageMagick — the same libraries that power image pipelines across the web — so colour, transparency and metadata are handled correctly wherever the target format supports them.
SGI has no alpha channel, so any transparent areas in your AVIF are flattened onto a solid background during conversion.
Typical uses: preparing assets for a website, attaching a file someone else can definitely open, or standardising a folder of mixed files into one format.
Privacy is the default here. Your AVIF file is uploaded over an encrypted connection, converted, downloaded the moment it's ready, and then deleted automatically a short time afterwards. We never keep your files, never build a library of your content, and never make you sign up to download the result.
Ready? Use the converter above, or explore related conversions: turn AVIF into a different format, or convert another format into SGI. Everything on Convert Me Pls is free, unlimited and watermark-free.
Yes. Convert Me Pls is completely free with no sign-up, no file-count limits and no watermarks added to your output.
Your files are uploaded over an encrypted connection, converted, and then deleted automatically a short time afterwards. We never keep your files and never build a library of your content.
We use the best available encoders (libvips, ImageMagick and ffmpeg) at high-quality settings for the cleanest possible result.
Conversions run on our servers and support large files comfortably; very large media is processed in a streaming pipeline.