Free online converter for converting files to MIFF.
We ensure quality, convenience, and support for all formats.
| Data type | Image |
| MIME type | image/x-miff |
| Developer | ImageMagick project (originally by John Cristy) |
| Primary use cases | Intermediate image storage in ImageMagick/GraphicsMagick workflows, pipeline/streaming exchange between commands, preserving metadata during complex processing, storing multi-image sequences for further conversion. |
MIFF is ImageMagick’s native, platform-independent raster format designed for lossless storage and reliable intermediate processing with a text header plus binary pixel data.
| Data type | Image |
| MIME type | image/x-miff |
| Compression | Optional lossless compression (often None; Zip/DEFLATE and BZip2 are supported). Some files may use legacy run-length or other historical modes depending on the writer. |
| Color depth | Commonly 8/16/32-bit per channel; can store higher-precision data in some ImageMagick configurations. |
| Color space | RGB by default; can store CMYK and other colorspaces depending on header settings. |
| Transparency support | Yes |
| Animation support | Yes |
| Metadata | Preserves ImageMagick-known metadata and properties (e.g., color profiles, comments, author/copyright, and other attributes). |
| Standard / Specification | ImageMagick MIFF (Magick Image File Format) documentation/specification |
| Typical file size | Often medium to very large compared to PNG/JPEG, especially when uncompressed or when storing high bit-depth/channel data. |
The MIFF file format offers several advantages that make it suitable for common use cases.
The MIFF file format has certain limitations that may affect its use in specific scenarios.
MIFF images are widely supported and can be viewed on most devices and platforms.
Treat MIFF as untrusted input: malformed headers/pixel streams can trigger decoder bugs; embedded profiles/metadata may leak sensitive information—strip metadata when needed.
Format is documented by the ImageMagick project; commonly used within open-source ImageMagick workflows.