ARW to ICO Converter

Turning a Sony Raw Into a Windows Icon: What This Tutorial Covers

This is the short course on getting a usable .ico out of a Sony Alpha raw file: which size to pick, why the result never looks as sharp as the photograph did, and what an ICO can and cannot hold. An ICO is a Windows icon — the image behind a desktop shortcut, an application, or a site's favicon — and it addresses at most 256×256 pixels, so a 24-megapixel raw is being reduced by an enormous factor on the way in. That is the whole job of this page. If you want a viewable copy of the picture instead, ARW to JPG or ARW to PNG is the right tool.

How to Convert ARW to ICO

1. Upload Your ARW File: Drag and drop your Sony .arw onto the page or click "+ Add Files" to browse. Several raw frames can be queued and converted in one batch.
2. Pick a Size Under Image Resolution: The only control on this conversion is "Image resolution", whose Preset dropdown lists icon sizes — 256P, 192P, 180P, 128P, 64P, 48P, 32P, 24P, and 16P. Choose the size the icon will actually be displayed at.
3. Leave the Preset Alone for a Full-Size Icon: If you do not choose a size, the picture is fitted into a 256×256 box, which is the largest image an ICO can address. There is no quality, palette, or bit-depth control on this conversion — those belong to other image targets.
4. Convert and Download: Click Convert and save the .ico. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

Walk-through: Picking the Icon Size

The size you pick is the whole conversion, so it is worth matching it to where the icon will be used rather than defaulting to the biggest number.

• Website favicon: 16P or 32P covers browser tabs and bookmarks. Anything larger is wasted on a 16-pixel tab, and detailed photography is unreadable at that size regardless.
• Windows desktop or application icon: 256P is the safe choice. Windows scales an icon down far more gracefully than it scales one up, so starting from the largest available size looks better across mixed-DPI displays.
• Aspect ratio is preserved. Our converter fits the image inside the box you choose rather than squashing it, so a standard 3:2 Sony frame at 256 comes out 256 pixels wide and around 170 tall — not square. If you need an exactly square icon, crop or pad the photo to 1:1 before converting.
• One size per file. The ICO format can hold several images at different sizes inside a single file, but this conversion writes one image at the size you pick. Windows will resample it when it needs a different size, which is another reason to pick the largest size you will actually need.

ARW vs ICO: What Survives the Conversion

Icon Sizes and Where Windows Uses Them

Microsoft's own icon guidance names 16, 32, and 48 pixels square as the common sizes to supply; 256 exists for modern high-resolution displays.

Common Errors and How to Fix Them

• "The icon is an unrecognisable blur." A photograph reduced to 16 or 32 pixels loses everything but its dominant colours. Icons read best when the source is a simple, high-contrast shape. Crop tightly to one subject before converting, or start from a logo rather than a scene.
• "The icon is not square." Expected: the conversion keeps your photo's aspect ratio inside the size you chose. Pad or crop the image to 1:1 first if a square is required.
• "It looks fine at 256 but soft in the taskbar." Windows is rescaling your single stored image to the size it needs. Convert a second file at the smaller size and use that where the small icon is displayed.
• "The colours do not match my edit." The raw is rendered with a neutral default; a Sony Creative Look or picture profile is an in-body rendering instruction that third-party renderers do not reproduce exactly. Export a finished image from your raw editor, then convert that.
• "My upload is slow." Sony raws run tens of megabytes each, so the transfer dominates the job — the icon itself is a few kilobytes at most.

When This Doesn't Work

ICO is a delivery format for interface graphics, not a way to keep a photograph. If your goal is to view, print, share, or re-edit the shot, this is the wrong page: convert ARW to JPG for a universal image, ARW to PNG for lossless 8-bit output, or ARW to TIFF for a high-bit-depth editing master. ICO is also the wrong target for modern app icon pipelines that expect PNG or SVG assets — check what your platform actually ingests before generating one. And if you need a multi-size icon set with 16, 32, 48, and 256 pixel variants inside a single file, generate each size here and combine them in a dedicated icon editor.

Frequently Asked Questions

Why does my icon look blurry or low on detail?

ICO addresses at most 256×256 pixels, so a multi-megapixel Sony frame is being shrunk by a factor of twenty or more, and every downscale adds anti-aliasing softness. Photographic detail simply does not survive at 16 to 48 pixels — the eye is left with a colour blob. The fix is compositional rather than technical: crop hard to a single high-contrast subject before converting, or build the icon from a simple graphic instead of a full scene.

What icon size should I choose?

For a website favicon, 16P and 32P cover browser tabs and bookmark lists. For a Windows desktop or application icon, choose 256P — it is the largest size the format addresses, and Windows scales an oversized icon down more cleanly than it scales a small one up. Microsoft's icon guidance names 16, 32, and 48 pixels square as the sizes worth supplying for classic interface use.

Does the ICO keep transparency?

The format can: an ICO image can be 32-bit with an 8-bit alpha channel, which is how modern Windows icons get smooth, non-rectangular edges. Your source cannot, though. An ARW is an opaque sensor capture with no transparent areas, so the icon comes out fully filled. To get a transparent background you have to cut the subject out in an image editor first — convert to ARW to PNG, mask it there, and build the icon from that.

Does the file contain several sizes, like a proper Windows icon set?

No. The ICO format supports multiple images at different sizes and colour depths inside one file, and Windows picks the closest match to what it needs, but this conversion writes a single image at the size you select. If you want a true multi-resolution icon, convert the photo once per size here and merge the results in an icon editor that supports multi-image ICO files.

Will my icon come out square?

Only if your source is square. We fit the image inside the box you choose and keep its aspect ratio, so a standard 3:2 Sony frame at 256 lands at 256 pixels wide by roughly 170 tall. Windows will still display it, but it will not fill a square icon slot. Crop to 1:1 — or pad the frame with a background colour — before converting if squareness matters.

Why is 256×256 the ceiling for an ICO file?

Because of how the format's directory is laid out: each image entry stores its width and height in a single byte apiece, which caps the addressable dimension at 256. Our converter clamps any larger request to that limit rather than failing, so an oversized request quietly becomes a 256-pixel icon. If you need something bigger, you need a different format — PNG is what most modern icon pipelines actually consume.

Will this give me a usable copy of my photograph?

No, and it is not meant to. The conversion exists to make an icon: the image is reduced to at most 256 pixels on its longest side and to ordinary 8-bit colour, so virtually all of the raw's resolution and tonal latitude is discarded. To keep a viewable, editable photograph, convert your ARW to JPG, PNG, or TIFF instead, and treat the icon as a by-product.

What happens to my ARW file after the conversion?

It is uploaded over an encrypted connection, rendered and written to ICO on our servers, and deleted automatically a few hours later — no sign-up, no watermark, never shared or made public. Only the icon you download persists. Since icons are tiny and raws are not, the upload is the slow half of this job; converting a few files at a time feels quicker than queueing a whole card's worth.