.QOI File Extension

Quite OK Image Format

Developer Dominic Szablewski
4.0  |  2 Votes

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.

More Information

Screenshot of a .qoi file in ImageMagick
QOI file open in ImageMagick

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.

How to convert a QOI file

You can use ImageMagick or XnViewMP to convert QOI images to other formats. For example, XnViewMP can convert QOI files to the following formats (and many others):

  • .JPG - JPEG Image
  • .GIF - Graphical Interchange Format
  • .PNG - Portable Network Graphic
  • .TIFF - Tagged Image File Format
  • .BMP - Bitmap Image
  • .PCX - Paintbrush Bitmap Image
  • .TGA - Targa Graphic
  • .JP2 - JPEG 2000 Core Image
  • .JXR - JPEG XR Image
  • .WEBP - WebP Image
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Programs that open QOI files


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