RW2 to WebP Converter

Convert RW2 to WebP Online

RW2 is the proprietary raw format Panasonic LUMIX cameras write — a large, unprocessed capture that browsers and most apps cannot open. This converter renders it to WebP, the web format that carries both lossy and lossless compression plus an alpha channel and, by Google's own measurements, lands 25-34% smaller than a comparable JPEG at equivalent SSIM and 26% smaller than PNG when lossless. The trade you are making is explicit: rendering the raw bakes in exposure and white balance, so you swap RW2's editing latitude for a portable, web-ready file.

How to Convert RW2 to WebP

1. Upload Your RW2 File: Drag and drop your .rw2 files onto the page or click "+ Add Files". You can queue several shots and convert the batch with one set of settings.
2. Pick a Quality Preset: "Quality Preset" opens on "Very High (Recommended)", which maps to WebP quality 95. Step it down through High, Medium and below to shrink the file; this is the main lever on the size-versus-detail trade.
3. Set Lossless and Resolution (Optional): "Lossless?" opens on "No (Recommended)" — switch it to "Yes" for a pixel-exact render. "Image resolution" opens on "Keep original"; use Resolution Percentage or Width x Height to downscale for the web.
4. Convert and Download: Click "Convert" and save your WebP. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

What Each Setting Produces

Every figure below came from the same 20.9 MB Panasonic DC-FZ45 raw, which decodes to a 4912 x 3688 RGB frame, converted at full resolution.

The pattern to take away: at full resolution the preset does far more work than most people expect — dropping from Very High to Medium cut this file by more than four-fifths. If you are publishing to a web page, downscaling with "Image resolution" on top of that will usually matter more than either.

RW2 vs WebP: What Changes in the Conversion

Frequently Asked Questions

Will I lose image quality converting RW2 to WebP?

You lose editing flexibility rather than visible quality. At "Very High" — quality 95 — or with "Lossless?" set to Yes, the render 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 rescue a badly under-exposed frame or change the white balance the way you could from the RW2. Keep the raw; treat the WebP as an export.

Should I choose lossy or lossless WebP for my LUMIX photos?

Lossy for anything headed to a website or a social post — that is what the format was built for, and Google's own figures put lossy WebP 25-34% below a comparable JPEG at equivalent SSIM. Choose lossless only when you need a pixel-exact copy of the render or plan to edit it further. On the sample above, lossless produced 27.0 MB against 6.22 MB for the preselected lossy preset, so the cost of that exactness is more than four times the file.

What file size should I expect from a full-resolution RW2?

Bigger than a web-optimised image, because you are still at full sensor resolution. The 20.9 MB DC-FZ45 raw used here produced 6.22 MB at the preselected "Very High" preset, 8.10 MB at "Highest", and 1.40 MB at "Medium" — all at 4912 x 3688. Exact numbers vary with scene content: busy foliage and fine texture compress far less than smooth skies. For web use, set a Resolution Percentage or an explicit Width x Height as well; that is usually the bigger win.

Does WebP keep the transparency or EXIF metadata from my RW2?

WebP fully supports an alpha channel in both lossy and lossless modes, but a raw camera capture is opaque, so there is no transparency to carry over unless you add it later in an editor. As for EXIF, the shooting data your camera wrote into the RW2 should not be treated as guaranteed to survive the render — do not use the WebP as your record of camera, lens and exposure. Keep the original .rw2 if those fields matter to you.

Why can't my photo editor or browser open RW2 directly?

RW2 is a proprietary Panasonic raw format. It borrows the TIFF structure — a standard image file directory with Panasonic's own raw tags alongside the ordinary ones — but Panasonic does not publish a full specification, so support is uneven across applications and effectively absent in browsers. Rendering to WebP sidesteps the problem entirely: the output opens in every current browser without a plugin or a raw decoder.

Can I target an exact file size instead of picking a preset?

Yes. Switch "File Compression" from "Quality Preset" to "Specific file size" and type your target in bytes, kilobytes or megabytes. Leave "Auto Scale" enabled if you are willing to let the converter reduce the pixel dimensions to reach a target that quality alone cannot hit — on a full-resolution 18-megapixel frame, a target of a few hundred kilobytes will need the scaling as well as the compression.

Should I convert to WebP or JPG from RW2?

WebP whenever your target supports it and you want the smallest file at a given quality, which today means essentially every browser and most CMS platforms. Choose RW2 to JPG when you need maximum compatibility with older software, print labs, or a system that still refuses WebP uploads. If a WebP you have already exported is larger than you would like, Compress WebP will shrink it without going back to the raw.

Are my uploaded RW2 files kept private?

Your file is uploaded over an encrypted connection, rendered 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. The practical constraint on a large job is the upload itself rather than anything on our side: LUMIX raws routinely run 20 MB or more each, so a full card of them is a substantial transfer.