Export to QOI
Convert any image to QOI format. Fast lossless encoding.
Learn more in the docs →About this converter
Fast Encoding
QOI encodes 20–50× faster than PNG with similar compression ratios.
Simple Format
The QOI specification is one page, easy to integrate, debug, and ship.
Lossless
No quality loss. Every pixel preserved exactly.
Frequently Asked Questions
What is QOI?
QOI (Quite OK Image) is a fast lossless image format created in 2021. It encodes much faster than PNG and decodes 3–4× faster, with comparable file sizes.
Why use QOI instead of PNG?
QOI is great for real-time pipelines, game development, and workflows where encoding speed matters. PNG is still better for the open web due to universal support.
What software supports QOI?
Image viewers like XnView, IrfanView, and many game engines. The simple spec makes it easy to add support to any application.
Are there any size limits?
Yes. Images larger than 4096×4096 pixels are rejected to keep encoding responsive in the browser.