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Supports: RW2
RW2 is the proprietary RAW format written by Panasonic Lumix cameras — a large, unprocessed file that most browsers and apps can't open. This converter renders that RAW into a WebP image, the modern web format that supports both lossy and lossless compression plus an alpha channel, and typically lands smaller than the same picture saved as JPEG or PNG. One thing to be clear about up front: rendering a RAW "bakes in" the exposure and white balance, so you trade away RW2's editing latitude for a portable, web-ready file.
.rw2 files onto the page or click "+ Add Files." You can queue several shots and convert them in one batch.| Property | RW2 (Panasonic RAW) | WebP (rendered output) |
|---|---|---|
| What it stores | Unprocessed sensor data, typically 12- or 14-bit | Rendered pixels, 8-bit per channel |
| Editing latitude | High — recover highlights, re-set white balance non-destructively | Low — exposure and white balance are baked in |
| Compression | Lightly compressed RAW, large files | Lossy or lossless; lossy ~25–34% smaller than JPEG, lossless ~26% smaller than PNG |
| Transparency | No alpha channel | Alpha supported in both lossy and lossless modes |
| Opens in a browser | No — needs RAW software | Yes — Chrome 32+, Firefox 65+, Edge 18+, Safari 16+ |
| Best for | Archiving and post-processing | Publishing finished images to the web |
You lose editing flexibility, not necessarily visible quality. At the "Very High" preset (or with Lossless set to Yes), the rendered WebP looks essentially identical to a full-quality export. What you give up is the RAW's headroom: once the file is WebP, you can no longer push a badly under-exposed frame or change the white balance the way you could from the original RW2.
Use lossy (the default) for anything headed to a website or social post — Google's own figures put lossy WebP at roughly 25–34% smaller than an equivalent JPEG, which is the whole point of the format. Choose lossless when you need a pixel-exact archival copy or plan to do further edits; lossless WebP runs about 26% smaller than PNG while staying bit-for-bit faithful to the render.
WebP fully supports an alpha channel in both lossy and lossless modes, but RW2 photos are opaque captures, so there's no transparency to carry over unless you add it later. EXIF shooting data (camera, lens, exposure) is written by your camera into the RW2; whether it survives depends on the render, so don't rely on the WebP as your metadata of record — keep the original RW2 if those fields matter.
RW2 is a proprietary Panasonic RAW format based on the TIFF structure, and Panasonic doesn't publish a full public spec, so support is uneven across apps and effectively absent in web browsers. Rendering to WebP sidesteps that entirely — the output opens in every current browser (Chrome, Firefox, Edge, and Safari 16+).
In our testing, a 20-megapixel Lumix RW2 rendered at the "Very High" lossy preset produced a WebP of roughly 2–4 MB at full resolution, versus the 20–30 MB of the source RAW. Downscaling with "Resolution Percentage" or a fixed "Width x Height" drops that much further for web use. Exact numbers vary with scene detail — busy textures compress less than smooth skies.
Convert to WebP when your target supports it and you want the smallest file at a given quality — that's almost every modern browser. Choose RW2 to JPG when you need maximum compatibility with older software, print labs, or apps that still don't read WebP. If you already have web images in other formats, PNG to WebP handles those too.
Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.