HEIC to MIFF Converter
Processing entirely on your device — large files may take a moment.
HEIC/HEIF Image and Magick Image File Format exist for different jobs: HEIC (High Efficiency Image Container) is the default photo format of iPhones. It stores photos in roughly half the space of JPG, but many programs and older systems still cannot open it directly. Convert images to MIFF when a downstream ImageMagick pipeline expects it, or MIFF to PNG/JPG for viewing.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How HEIC compares to MIFF
| HEIC | MIFF | |
|---|---|---|
| Compression | Lossy HEVC (lossless variant exists) | RLE / none |
| Transparency | Supported | Supported |
| Animation | Supported (bursts/sequences) | Multi-frame supported |
| Metadata | EXIF, depth maps, HDR gain maps | Extensive key-value header |
| Best for | iPhone photo storage | ImageMagick intermediates |
How to convert HEIC to MIFF
- 1
Select your files
Drag & drop your HEIC 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 HEIC format
HEIC (High Efficiency Image Container) is the HEIF container carrying HEVC-compressed image data, and it has been the default photo format on iPhones since iOS 11. At equivalent quality it stores photos in roughly half the space of JPG, keeps 10-bit color and HDR information intact, and can hold multiple images — bursts,Live Photos pairs, even depth maps — in one file.
Its weakness is everything outside Apple's ecosystem. Windows needs an extension from the Store to preview it natively, many web services still reject the upload, and HEVC's patent licensing slowed hardware adoption on non-Apple devices. Android 9+ phones generally handle it, but the desktop web remained JPG territory for years.
+Strengths
- ✓About half the size of JPG at the same quality
- ✓10-bit color and HDR survive the pipeline
- ✓One file can hold bursts, sequences and depth data
!Limitations
- −Windows and many web services need extras to open it
- −HEVC patent licensing complicated adoption outside Apple
- −Thumbnail and preview performance on old hardware is poor
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 HEIC to MIFF?
Think of it as moving your file to the container that fits the job. Windows and many web services need extras to open it MIFF works differently: Lossless with full channel fidelity If any of that sounds like your task, run the conversion — it takes seconds and nothing leaves your device.
Frequently asked questions
Is this HEIC 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 HEIC to MIFF?
No — MIFF is a lossless format, so every pixel of the converted image matches your original HEIC 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 HEIC files matters (camera model, GPS, timestamps), keep the original file as the master and treat the converted copy as the shareable version.
Can I convert several HEIC files at once?
Yes — drop as many files as you like into the tool and they are converted in one batch. When more than one file comes out, everything is bundled into a ZIP for a single download.