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Supports: RW2
.rw2 files are accepted as input. Batch is supported — drop in a folder of camera files and each one is decoded and converted in parallel.RW2 is Panasonic's proprietary RAW photo format, introduced around 2008 with the Lumix DMC-G1 — Panasonic's first Micro Four Thirds camera — and used across the Lumix line since, from the GH and G bodies to the full-frame S-series. It is not a finished picture. An RW2 stores the unprocessed Bayer-mosaic readout straight off the camera's CMOS sensor (12-bit or 14-bit depending on the model) in a container based on the TIFF specification, along with white balance, exposure, and lens metadata. That raw sensor data is what gives photographers enormous latitude to recover highlights, lift shadows, and re-balance color after the shot — but it is also why an RW2 is awkward to live with day to day.
The core problem is that almost nothing opens an RW2 out of the box. Web browsers, phones, chat apps, and most image viewers have no Panasonic RAW decoder, so the file shows as a broken thumbnail or refuses to load entirely. Even desktop editors need a Camera Raw version new enough to recognize the specific camera body. Converting solves this by "developing" the RAW into a standard image that anything can read:
| Property | Value |
|---|---|
| Full name | Panasonic RAW Image (Lumix) |
| Introduced | Around 2008, with the Lumix DMC-G1 |
| Container | Based on the TIFF / TIFF-EP specification |
| Sensor data | Unprocessed Bayer-mosaic CMOS readout, 12-bit or 14-bit |
| Compression | Lossless or uncompressed (model-dependent); no visible artifacts |
| Color processing | Deferred to RAW developer (white balance, tone, sharpening not baked in) |
| Native browser support | None — browsers and phones have no RW2 decoder |
| Opens with | SILKYPIX (Panasonic-bundled), Adobe Lightroom / Camera Raw, RawTherapee, darktable, XnViewMP, Apple Preview, Windows Photos with the Raw Image Extension |
| Best converted to | JPG / WebP for sharing, 16-bit TIFF / PNG for editing and archival |
On the desktop, the free SILKYPIX Developer Studio that Panasonic bundles with Lumix cameras opens RW2 natively, as do Adobe Lightroom and Camera Raw (if your version is new enough for that camera body), RawTherapee, darktable, and XnViewMP. macOS Preview and Photos handle most RW2 files out of the box, and Windows Photos can after you install Microsoft's free Raw Image Extension. What does not open an RW2 is anything web-based — browsers, chat apps, and phone galleries have no Panasonic RAW decoder, which is why converting to JPG or PNG is usually the fastest fix.
You lose editing latitude, not visible quality. The RW2 holds 12-bit or 14-bit unprocessed sensor data, so it can recover blown highlights and crushed shadows that a JPG cannot. Once you "develop" it to an 8-bit JPG at high quality, the picture you see looks essentially identical — but the recovery headroom is gone. If you want to keep that headroom for later editing, convert to a 16-bit TIFF or PNG instead; if you just want a file you can share and view, JPG or WebP is the right call.
Neither in the way a JPG is. Depending on the camera, RW2 is either uncompressed or uses lossless compression, so it never introduces the blocky artifacts that lossy formats do. That fidelity is exactly why the files are large — a single RW2 is often 20-30 MB versus a few MB for the JPG developed from it. Converting to JPG or WebP is what trades that size for the artifact-prone but tiny files everything can read.
A 16-bit TIFF (or 16-bit PNG) is the best non-RAW editing target. It keeps far more tonal precision than an 8-bit JPG, so gradients in skies and skin tones stay smooth through heavy adjustments, and it imports into editors that can't read RW2 directly. Pick RW2 to TIFF and enable 16-bit depth when you plan to keep editing; reserve JPG for the final, finished export.
Yes. Drop multiple RW2 files in together and each is decoded and converted in parallel, then handed back as a ZIP you can download in one click. This is the practical way to develop a day's shoot from a Lumix card into shareable JPGs without opening each one in a RAW editor. The realistic limit is upload size and your connection speed, since the files are processed on our servers rather than on your device.
They solve different problems. Adobe's DNG Converter re-wraps an RW2 into Adobe's open DNG RAW format so older versions of Photoshop or Lightroom can read it — it stays a RAW file. This tool instead develops the RW2 into a finished image (JPG, PNG, TIFF, WebP) that any app or browser can open without a RAW workflow at all. In our testing, a 20 MB RW2 from a Lumix GH-series body developed to a roughly 4 MB high-quality JPG and a 60 MB 16-bit TIFF — pick the JPG path when the goal is sharing, the TIFF path when you still need to edit.
Yes. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. There is no sign-up, no watermark on the output, and your photos are never shared or made public. If you need to develop many RAW files but prefer to keep everything offline, the bundled SILKYPIX software does it on your own machine, just more slowly per file.