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Need help?RW2 to ICO Converter
RW2 is the raw photo format written by Panasonic Lumix cameras — full-resolution, high-bit-depth sensor data straight off the chip. ICO is the Windows icon container, where each image is at most 256×256 pixels. This converter renders the raw photo and downscales it into an icon you can use as a Windows application icon or a website favicon. It is a deliberate one-way trip: a multi-megapixel raw becomes a tiny, standard-color-depth icon.
RW2 Format at a Glance
| Property | Value |
|---|---|
| Full name | Panasonic RAW Image (Lumix) |
| Type | Camera raw still image (Bayer sensor data) |
| Based on | TIFF / TIFF-EP tag structure |
| Bit depth | Typically 12- or 14-bit per channel |
| Color state | Mosaiced — needs demosaicing before it can be viewed |
| Released by | Panasonic, used across Lumix DMC / DC bodies |
| Best for | Editing latitude, white-balance and exposure recovery |
ICO Format at a Glance
| Property | Value |
|---|---|
| Full name | Windows Icon |
| Max size per image | 256×256 pixels |
| Multi-resolution | Yes — one .ico can bundle several sizes (16, 32, 48, 256…) |
| Color depth | Up to 32-bit, including an 8-bit alpha (transparency) since Windows XP |
| Internal storage | Classic BMP/DIB entries or PNG-compressed entries |
| Best for | App icons, the Windows taskbar/Explorer, and website favicons |
How to Convert RW2 to ICO
- Upload Your RW2 File: Drag and drop your
.rw2photo onto the page or click "+ Add Files." You can queue several raws to icon-ify in one batch. - Set the Image Resolution: Open the resolution dropdown and pick an icon size — 256P for a full favicon, or 32P / 16P for small toolbar and tab icons. Sizes above 256 are hidden because ICO caps each image at 256×256.
- Check the Shape Before Converting: The preset is the only control an ICO target exposes — no bit-depth, colour-reduction or quality setting, and no percentage, "Keep original" or Width × Height box. It sets the icon's height and the width follows your photo's aspect ratio, with nothing cropped or padded, so a 4:3 Lumix frame at 256P comes out 341×256 — wider than the 256 an ICO directory entry can declare. Raw 12–14-bit latitude is baked down to 8-bit either way.
- 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
Will I lose quality converting RW2 to ICO?
Yes, and by design. An RW2 holds many megapixels of 12–14-bit sensor data; an ICO image is capped at 256×256 and stored at standard 8-bit depth. The raw's wide exposure latitude is baked into a fixed rendering and the resolution is shrunk dramatically. That is fine for an icon, but it is not a way to archive a photo. To keep a normal viewable picture, convert to RW2 to JPG or RW2 to PNG instead.
What icon size should I choose for a favicon?
For a website favicon, 256×256 (the 256P preset) is the safe upper bound — browsers and Windows downscale it to the size they need. If you only want classic small icons, 32×32 and 16×16 are the traditional taskbar and browser-tab sizes. Because ICO is a multi-resolution container, a 256-pixel icon already scales down cleanly for most uses.
Why does my RW2 look different after rendering?
A raw file is mosaiced Bayer data, not a finished picture. It has to be demosaiced and rendered — white balance, gamma, and tone curve applied — before it can be displayed. Our pipeline applies a neutral default rendering, so the result can look flatter or differently white-balanced than the in-camera JPEG preview your Lumix showed you. That preview was Panasonic's own processing baked into the camera.
Does the ICO keep transparency from the photo?
A standard rendered RW2 is fully opaque, so there is no transparency to carry over. ICO itself does support a 32-bit mode with an 8-bit alpha channel, but a photo has no alpha to preserve. If you need a transparent icon, mask the image first in an editor, export a PNG with alpha, then convert that.
Can I convert several RW2 files to ICO at once?
Yes. Add multiple .rw2 files and they are processed with the same resolution preset — the only setting an ICO target exposes — then returned as individual .ico files. This is handy when you are generating a set of app icons from a batch of shots.
Is the original RW2 raw data still usable elsewhere?
The conversion does not touch your source file — only a copy is uploaded and processed, and the upload is deleted automatically after a few hours. Your original RW2 keeps its full 12–14-bit latitude for editing in Lightroom, Capture One, RawTherapee, or darktable. The ICO is a derived output, not a replacement for the raw.
Is there a file size limit for RW2 uploads?
The practical constraint is upload size and time, not your computer — RW2 files are large, so a slow connection is usually the bottleneck, not the conversion itself. The page accepts standard Lumix raws; very large multi-file batches simply take longer to upload over the encrypted connection before processing begins.
How do I set the .ico as a Windows icon?
For a desktop shortcut, right-click it, open Properties, go to the Shortcut tab, click "Change Icon," and browse to your .ico. For a folder, use Properties → Customize → "Change Icon." Windows reads the icon directly and shows the closest embedded size for its context, whether that is the taskbar, a shortcut, or Explorer's large-icon preview.
What bit depth does the ICO use, and how do I make it smaller?
The icon is written at standard 8-bit-per-channel colour (32-bit including the alpha channel), which the raw's 12–14-bit data is baked down to during rendering. There is no bit-depth or colour-reduction control on this page to change that — the Image Compression group is hidden for ICO output entirely. The size preset is the only lever on file size, and it is a strong one: a 48P icon costs a small fraction of what a 256P one does.