.QOI File Extension
Quite OK Image Format
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|Category||Raster Image Files|
What is a QOI file?
A QOI file is a raster image saved in the Quite OK Image Format (QOI). The image it contains is losslessly compressed and saved in a 24-bit RGB or 32-bit RGBA format. QOI files are the same size as similar .PNG files, but can be encoded and decoded more quickly.
In November 2021, developer Dominic Szablewski released the QOI format. The format is intended to be an open-source format that is easier to implement and faster to use than PNG.
Specifically, QOI images can be encoded 20 to 50 times faster than similar-sized PNG images, and they can be decoded 3 to 4 times faster. Each QOI image includes a 14-byte header, which identifies the image as a QOI file and specifies the image's width, height, included channels, and colorspace.
How to open a QOI file
You can open a QOI file with ImageMagick 7.1.0-20 and later versions (multiplatform) or XnViewMP 1.0 and later versions (multiplatform). You can also open a QOI file in IrfanView (Windows) after installing an associated plug-in.