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A modern image format optimized for fast encoding and decoding.
File type: Bitmap image file
The .qoi file extension represents the Quite OK Image format, a lightweight and efficient image format designed for simplicity and speed. It is supported by various image viewers and editing tools that incorporate QOI format support.
File type category:
Bitmap image file
Date updated: July 19, 2026
The QOI (Quite OK Image) format was introduced as a high-performance image format emphasizing simplicity, speed, and minimalism. It is designed to encode images rapidly while maintaining good compression quality, making it suitable for applications requiring fast image processing, such as real-time graphics, gaming, and quick asset loading.
The format uses a straightforward encoding scheme that reduces computational overhead, resulting in very fast decoding and encoding speeds. It supports common image features such as RGB or RGBA color modes and lossless compression. QOI files are typically small, with efficiencies comparable to other simple formats like PNG but with much less decoding latency.
Supported across multiple platforms, the QOI format can be handled by various software tools and libraries. Many modern image viewers and converters now include support for QOI, and some command-line tools are available for encoding and decoding QOI images. The format's openness and simplicity foster quick adoption and implementation in diverse software environments.
To open .qoi files, you can use software that specifically supports the format, such as dedicated image viewers or conversion tools. Some versatile image viewers and editing software include plug-ins or built-in support for QOI, allowing you to view or edit these images seamlessly.
On Windows, Mac, and Linux, look for image viewers, converters, or preview tools that list QOI support. If your preferred software does not natively support QOI, consider using dedicated command-line tools or image conversion programs that can handle QOI files for viewing or further processing.
Converting images to and from the QOI format can be done using dedicated command-line tools or desktop applications that support QOI encoding and decoding. Many of these tools are open source and can be installed on Windows, Mac, or Linux systems.
Online converters are also available, allowing you to upload images and convert them to QOI format without installing software. When converting, ensure you're using up-to-date tools that support the latest QOI features for optimal results.
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