Panasonic RW2 to TIFF

It is a free browser tool for photographers who shoot Panasonic Lumix cameras. Many programs, print workflows, and archive systems cannot read RW2, Panasonic's raw format, but almost all of them accept TIFF. Inside every RW2 the camera stores a JPEG preview of the shot, the image you see on its screen. The converter finds the largest one, rotates it to the shot's orientation, and writes it out as a baseline, uncompressed RGB TIFF with the original file name.

TIFF is lossless, so saving the preview as TIFF adds no new compression on top of the camera's own JPEG, which helps if the image will be retouched and saved several more times. TIFF is also the format many print and layout workflows ask for. Keep in mind what it cannot do: the TIFF holds the camera's 8-bit rendering, not the raw sensor data, so it has no more dynamic range or color depth than that preview.

Click the drop area or drag files onto it, selecting as many RW2 files as you need. They appear in a list with their sizes, and you can add more before starting. Click Convert to TIFF and the tool processes them one at a time, marking each Extracting and then Done, and downloads each TIFF separately as soon as it is ready. Your browser may ask you to allow multiple downloads. There are no output settings to choose; every file is saved the same way.

Use it when someone, or some program, needs a lossless file from a raw shot quickly and you do not want to open a raw editor: sending a frame to a retoucher for a first look, placing an image in a layout, or archiving a viewable copy beside the raw. Because the TIFF is the camera's own rendering, it is not a substitute for a developed master. For final prints and serious retouching, process the RW2 in your raw editor and export a 16-bit TIFF from there.

The tool writes uncompressed TIFFs, which store three bytes for every pixel with no compression at all. A 20 megapixel image therefore comes out at roughly 60 MB, while the RW2 packs its sensor data and a compact JPEG preview into far less. The size reflects the format, not added detail. If storage is tight, keep the RW2 as your master and convert only the shots you need, or use a PNG or JPEG converter for files that just need to be viewed.

No. Every file is saved as an 8-bit RGB TIFF, which is all the embedded preview contains, so a 16-bit file would only be larger without holding any more tonal information. 8 bits per channel gives 256 levels each of red, green, and blue, fine for viewing, layouts, and printing an image that needs little further adjustment. If you need 16-bit data for heavy editing, export it from the original RW2 with a raw processor.

No. The TIFF contains the image and the basic tags needed to read it, but not the EXIF data from the RW2, so shutter speed, aperture, ISO, lens, capture time, and camera model are not carried over. The shot's orientation is applied to the pixels, so the image still displays the right way up. Keep your RW2 files alongside the TIFFs, or catalog the originals, if you rely on that metadata for organizing and searching your library.

The TIFF step is lossless: the preview's pixels are written out uncompressed, exactly as decoded, with nothing discarded. The preview itself, though, is a JPEG the camera made from the sensor data, so it already carries the camera's processing and light JPEG compression, and it has none of the raw file's extra dynamic range. In short, the TIFF is a faithful, lossless copy of the camera's rendering rather than a lossless copy of the raw data.

No. The converter runs in any modern web browser on Windows, macOS, Linux, or ChromeOS, with nothing to install. All the work happens on your own device, so your RW2 files never leave it, and speed depends on your computer rather than a network. Large raw files take a moment each to read and encode, and very big batches use more memory, so on a modest machine converting in smaller groups can help.

The file picker accepts files ending in .rw2; files with other extensions are rejected with a message. If a file is accepted but shows No preview image found, the tool could not locate a usable embedded JPEG, which usually points to a damaged or incomplete copy. The preview could not be decoded means one was found but your browser could not read it. Copy the file from the card again, confirm it opens in your camera maker's software, and try a current browser.