Convert APNG to QOI Online Free
Convert animated PNG files to QOI (Quite OK Image Format) — a fast, lossless image codec designed for simple, speedy encoding and decoding in software applications.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts APNG to QOI instantly in your browser using the Canvas API. No file upload needed — the first frame of your animated PNG is extracted and saved as a lossless QOI image. Drop your file and download the result in seconds. Free and completely private.
Convert APNG to QOI
Drop your APNG file here to convert it instantly
Drag & drop your .apng file here, or click to browse
Convert to QOI instantly
APNG vs QOI: Format Comparison
Key differences between the two formats
| Feature | APNG | QOI |
|---|---|---|
| Animation | Yes (multiple frames) | No (single frame only) |
| Compression | Lossless PNG compression | Lossless (simple run-length based) |
| Encoding speed | Moderate | Extremely fast (simple spec) |
| File size vs PNG | Baseline | Similar size, faster to decode |
| Transparency | Full alpha channel | Full alpha channel (RGBA) |
| Browser support | Modern browsers | Not natively supported in browsers |
| Best for | Web animations | Game textures, software pipelines |
When to Convert
Common scenarios where this conversion is useful
Game texture pipelines
QOI is designed for fast decoding in game engines and graphics pipelines. Converting APNG frames to QOI provides lossless textures that load extremely quickly at runtime.
Software with custom image loaders
QOI's specification is tiny — under 300 lines of C. Developers embedding images in custom applications often choose QOI because it is trivial to implement a decoder without a heavy library.
Rapid prototyping and tooling
QOI's fast encode/decode cycle makes it useful in development workflows where images are frequently read and written. Converting APNG stills to QOI speeds up iteration in image processing pipelines.
Lossless archiving with fast access
If you need lossless image storage with the absolute fastest possible read speed, QOI outperforms PNG on decode time while maintaining identical pixel data.
How to Convert APNG to QOI
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1
Select your APNG file
Drag and drop your APNG file onto the converter, or click browse to choose from your files.
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2
Instant conversion
The browser extracts the first frame of your APNG and encodes it as a QOI image using the Canvas API. No upload needed and no data leaves your device.
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3
Download the QOI file
Save your converted .qoi file. Ready for use in QOI-compatible applications and game engines.
Frequently Asked Questions
QOI (Quite OK Image Format) is a fast, lossless image format created by Dominic Szablewski in 2021. Its specification is extremely simple — about 300 lines of C — making it trivial to implement. QOI decodes significantly faster than PNG while producing similar file sizes.
No. QOI does not support animation. Only the first frame of the APNG is extracted and saved as a static QOI image.
Yes. QOI stores full RGBA pixel data with a complete alpha channel. Transparent areas in the first APNG frame are fully preserved.
Web browsers do not natively support QOI. It is primarily used in desktop applications and game engines that explicitly support it. To view a QOI file in a browser you need a JavaScript QOI decoder.
Yes. QOI is a lossless format. The pixel data is stored exactly without any quality degradation.
QOI files are typically similar in size to PNG, sometimes slightly larger. The main advantage of QOI is not file size but encoding and decoding speed — QOI decodes several times faster than PNG.
No. ChangeThisFile processes everything in your browser using the Canvas API. Your APNG file is never uploaded or transmitted anywhere.
Several indie and custom engines have adopted QOI. The format has official bindings and libraries for C, Rust, Go, Python, JavaScript, and many other languages. Check your engine's documentation for native or plugin support.
The first frame of the animation is extracted. This is typically the default or resting state of the image.
A QOI file is a single static image. Converting it back to APNG would produce a single-frame APNG with no animation. You need animation authoring tools to build a proper animated APNG.
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