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QOI Converter — Encode & Decode the Quite OK Image Format
Convert images to and from QOI (the Quite OK Image format) right in your browser. Encode a PNG, JPG or WebP into a .qoi file, or decode a .qoi back to PNG, JPG or WebP. Lossless, fast, and fully offline — nothing is uploaded.
Convert images to and from QOI — the Quite OK Image format — entirely in your browser. Encode a PNG, JPG, or WebP into a compact lossless .qoi, or decode a .qoi back into a standard format. QOI is prized for compressing and decompressing far faster than PNG while staying completely lossless, and nothing here is ever uploaded.
How It Works
Choose a tool
Pick from 120+ tools to resize, convert, compress, or enhance your image.
Upload & edit
Drag and drop your image and adjust the settings. It stays on your device.
Download
Save your result instantly — no watermark, no sign-up required.
Why Image Machine?
Your files never leave your device
All processing runs locally in your browser. Your images are never uploaded to a server.
Completely free
Every tool is free, with no limits, no watermarks, and no hidden costs.
Lightning fast
No upload waiting — your images are processed instantly on your own device.
Professional quality
Pixel-perfect output with full control over format, size, and quality.
Frequently Asked Questions
What is the QOI image format?
QOI (Quite OK Image) is a simple, lossless image format designed to encode and decode much faster than PNG with a comparable file size. Its tiny specification makes it popular in games, tools, and graphics pipelines that need speed.
How does QOI compare to PNG?
QOI files are usually similar in size to PNG but encode and decode dramatically faster. PNG remains more universally supported, so QOI is best when you control both ends of the pipeline and want the speed.
Is QOI lossless?
Yes. QOI stores every pixel exactly, so converting to QOI and back to PNG produces a pixel-identical image with no quality loss.
Is the conversion private?
Yes. Both QOI encoding and decoding run entirely in your browser, so your images are never uploaded.