MOS to ICO Converter

MOS to ICO Converter

A .mos file is a Leaf Camera RAW photo — a large, high-bit-depth still captured by a medium-format digital back. .ico is the Windows icon container, designed to hold tiny app and favicon images. This converter demosaics the raw, renders it to standard 8-bit color, and downscales it into a multi-resolution icon. Be clear about the trade-off: a 22-80 megapixel raw shrinks to 256×256 pixels or smaller, so this is for turning a photo into an app icon or favicon, not for viewing the picture. If you want a normal viewable image, convert to JPG or PNG instead.

MOS (Leaf Camera RAW) at a Glance

ICO (Windows Icon) at a Glance

How to Convert MOS to ICO

1. Upload Your MOS File: Drag and drop your .mos file or click "Add Files." You can queue several raws and convert them in one batch.
2. Pick an Icon Size: Open Advanced Options and set Image Resolution. For ICO the preset list shows icon sizes — 16, 24, 32, 48, 64, 128, 192, and 256 pixels. 256 is the largest the format allows.
3. Set Bit Depth and Color Palette (Optional): Choose a bit depth (1, 8, or 16-bit) and, for a smaller file, cap the color palette. A reduced 8-bit palette keeps favicons compact; leave it higher for a crisp full-color app icon.
4. Convert and Download: Click Convert and save your .ico. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

Frequently Asked Questions

Why does my Leaf raw lose so much detail when I convert it to ICO?

Because ICO caps each image at 256×256 pixels, and your .mos may be 22-80 megapixels at 16-bit depth. The conversion bakes the raw's wide tonal latitude down to standard 8-bit color and shrinks it to icon dimensions. That resolution loss is unavoidable — ICO exists to label apps and tabs, not to preserve photographic detail.

What is a .mos file and what camera makes it?

It is the Leaf Camera RAW format, developed by Leaf Imaging (now part of Phase One). The files come from Leaf Aptus series and Mamiya medium-format digital backs. There are two variants: a fully uncompressed one and a TIFF-based one that uses lossless JPEG compression for the image data.

Can one ICO file hold several icon sizes at once?

The ICO format itself is built to store multiple images in a single file via its icon directory, which is how Windows picks the right size for the taskbar versus the desktop. This converter writes the size you choose in the resolution preset; if you need several sizes bundled together, generate each one and combine them in an icon editor.

Should I use ICO for a website favicon or a Windows app icon?

Both are valid ICO use cases. For a classic favicon, 16×16, 32×32, and 48×48 cover most browsers. For a Windows application icon, include larger sizes up to 256×256 so the icon stays sharp on the desktop and in File Explorer at high DPI.

Will the conversion keep my photo's color accuracy?

Not at raw fidelity. A .mos stores 16-bit-per-channel sensor data with a wide dynamic range; ICO output is rendered to 8-bit and may have its palette reduced for size. The result is a faithful-looking thumbnail, but it is not a color-managed photo. For editing or printing the original image, keep the raw or export to TIFF instead.

Is my MOS file kept private during conversion?

Yes. Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There is no sign-up, no watermark, and files are never shared or made public. If you only need a viewable photo rather than an icon, convert MOS to PNG keeps full resolution and transparency.