QOI to MIFF Converter
Processing entirely on your device — large files may take a moment.
QOI (Quite OK Image) is a 2022 lossless format with a ~200-line spec — PNG-class simplicity that compresses similarly fast. Convert images to MIFF when a downstream ImageMagick pipeline expects it, or MIFF to PNG/JPG for viewing.
Because the whole conversion happens on your device, it is instant, unlimited and genuinely private — no accounts, no watermarks, no files on anyone's server. Multiple files are converted in one go.
How QOI compares to MIFF
| QOI | MIFF | |
|---|---|---|
| Compression | Lossless (RLE/delta) | RLE / none |
| Transparency | Supported | Supported |
| Animation | Not supported | Multi-frame supported |
| Metadata | None | Extensive key-value header |
| Best for | Hobby engines, lossless simplicity | ImageMagick intermediates |
How to convert QOI to MIFF
- 1
Select your files
Drag & drop your QOI files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to MIFF". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted MIFF file individually, or grab everything at once as a ZIP archive.
About the QOI format
QOI (Quite OK Image, 2021) is a lossless format defined in one short specification document: a stream of simple run-length and delta ops over linear pixels. An encoder fits in 300 lines, decodes faster than PNG, and compresses comparably for photographic content.
It has found a home in emulators, demoscene projects and hobby engines — anywhere people want images without a codec dependency. Viewers rarely support it, so converting QOI to PNG is the way to bring these files into normal tools.
+Strengths
- ✓Radically simple spec (~200 lines)
- ✓Lossless with fast decode
- ✓No patent or licensing questions
!Limitations
- −Almost no viewer support
- −Larger than modern codecs for many images
About the MIFF format
MIFF is ImageMagick's own interchange format — a lossless raster container designed to carry exactly what the engine has in memory: every channel, an optional color profile, per-image properties and even multiple frames in one file. Command-line pipelines use it as the glue between successive ImageMagick operations.
Outside ImageMagick tooling almost nothing opens MIFF. Convert MIFF to PNG or JPG to hand pipeline intermediates to people, or into MIFF when feeding an ImageMagick chain that expects the format.
+Strengths
- ✓Lossless with full channel fidelity
- ✓Multi-frame and rich metadata support
- ✓Native to ImageMagick pipelines
!Limitations
- −Large files (little compression)
- −Unsupported outside ImageMagick
Why convert QOI to MIFF?
There is a concrete reason this conversion exists: Almost no viewer support MIFF sidesteps that — Lossless with full channel fidelity If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this QOI to MIFF converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Will I lose quality converting QOI to MIFF?
No — MIFF is a lossless format, so every pixel of the converted image matches your original QOI file. You can also adjust the quality/size balance before converting when the target format supports compression.
What happens to EXIF data and other metadata?
Conversions here re-encode the image, and re-encoding generally does not carry the original metadata over. If the EXIF data of your QOI files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.
Will transparent areas survive the conversion to MIFF?
Transparency is kept whenever MIFF actually supports an alpha channel. If the target format has none (like JPG), transparent areas are flattened onto a white background — that is a property of the format, not of this tool.