CRW to ICO Converter
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Supports: CRW
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Need help?CRW to ICO Converter
CRW is Canon's original camera raw format — unprocessed sensor data from early Canon DSLRs and PowerShots, wrapped in the CIFF container. ICO is the Windows icon container that holds one or more small images for app icons, shortcuts, and website favicons. Converting CRW to ICO takes a high-bit-depth raw photo, renders and demosaics it to a normal viewable image, and downscales it into a tiny multi-resolution icon. Expect a large drop in resolution and color depth: the raw's wide latitude is baked down to 8-bit and shrunk to at most 256×256 pixels.
CRW Format at a Glance
| Property | Value |
|---|---|
| Full name | Canon Raw (Camera Image File Format) |
| Container | CIFF — specification released by Canon, February 1997 |
| Released | Late 1990s; used through the early-to-mid 2000s |
| Payload | Unprocessed, demosaiced-on-export raw sensor data (typically 12-bit) |
| Best for | Archival originals and post-processing latitude |
| Superseded by | CR2 (2005, TIFF-based), later CR3 (2018) |
ICO Format at a Glance
| Property | Value |
|---|---|
| Full name | Windows icon container |
| Creator | Microsoft (Windows) |
| Max image size | 256×256 pixels per image (a 0 in the size field encodes 256) |
| Multi-size | Yes — one file can hold several sizes and color depths |
| Color depth | 1-bit up to 32-bit (24-bit color + 8-bit alpha, Windows XP and later) |
| PNG-compressed icons | Supported since Windows Vista for 256×256 icons |
| Best for | App icons, desktop shortcuts, and website favicons |
How to Convert CRW to ICO
- Upload Your CRW File: Drag and drop your
.crwfile or click "Add Files." You can queue several raws and convert them with the same settings. - Set the Image Resolution Preset: Open Advanced Options and pick the icon size from the Image resolution Preset dropdown (the default is 256P, the largest single-image ICO size). Choose a smaller preset like 32P or 64P for a classic small icon.
- Check the Shape Before Converting (Optional): ICO output has no colour-palette, quality-preset or bit-depth control — the size preset is the whole option set, and the percentage, "Keep original" and custom width/height modes are hidden too. That preset sets the icon's height and the width follows your photo's aspect ratio, with nothing cropped or padded, so a 3:2 Canon frame at 256P comes out 384×256 — wider than the 256 an ICO directory entry can declare. Crop the raw square first, or pick 128P.
- Convert and Download: Click "Convert" and download 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
Will I lose image quality converting CRW to ICO?
Yes, substantially — and that is unavoidable. A CRW holds multi-megapixel, roughly 12-bit raw sensor data. An ICO image tops out at 256×256 pixels and is rendered to standard 8-bit color, so almost all of the original detail and tonal latitude is discarded. ICO is meant for icons, not for viewing photos at full quality.
Why would I convert a Canon raw to an icon file?
Usually to turn a photo into a Windows app icon, a desktop shortcut graphic, or a website favicon. If the source you have on hand happens to be a Canon raw, this conversion renders and resizes it to icon dimensions in one step instead of going through a photo editor first.
What icon size should I choose?
For a favicon, 32×32 or 48×48 covers most browser and bookmark uses; for a Windows app or shortcut icon, 256×256 (the 256P default) gives the sharpest result on high-DPI displays. Because ICO can hold several sizes in one file, picking the largest preset is a safe default that still scales down cleanly.
Do I need Canon software like Digital Photo Professional first?
No. In our pipeline the CRW is demosaiced and rendered server-side, so you upload the raw directly and download an ICO — no separate Canon raw converter or photo editor is required.
Is CRW the same as CR2 or CR3?
No. CRW is Canon's original raw, built on the CIFF container. Canon replaced it with CR2 (Canon Raw v2, introduced in 2005 and based on TIFF) and later CR3 (2018). This converter targets the older .crw files; CR2 and CR3 use different converters.
What if I just want a normal viewable photo, not an icon?
Then ICO is the wrong target — its 256-pixel cap is far too small for a photo. Convert your raw to a full-size image instead with CRW to JPG for a compact shareable photo, or CRW to PNG if you need lossless quality or transparency.
Will my icon have a transparent background?
Only if the source had transparency — and a Canon raw photo doesn't. CRW holds an opaque, rectangular sensor image, so the resulting ICO is a solid square thumbnail. ICO itself supports a 32-bit mode with an 8-bit alpha channel, but there is nothing transparent in a photo to carry over. To cut the subject out on a see-through background, edit the image first — for example export a PNG with alpha — before making the icon.
Can I use the ICO file as a website favicon?
Yes. The .ico container is the classic favicon format, and every major browser still reads a favicon.ico served from a site's root. For a favicon a 32×32 or 48×48 image is plenty, so you don't need the full 256×256. Modern browsers also accept PNG and SVG favicons, but .ico remains the most universally supported fallback.
Are my files kept private?
Yes. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. They are never shared or made public, and there is no sign-up or watermark.