Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your DNG images to PNG64 format. This tool works for both professionals and casual users. Convert your images to PNG64 in seconds.
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DNG (Digital Negative)
The universal raw format designed to stand the test of time.
DNG (Digital Negative) is an open, royalty-free raw image format developed by Adobe. It was created to solve a major problem in digital photography: every camera manufacturer uses their own proprietary raw format (CR3, NEF, ARW, etc.), and when a new camera comes out, old software can't read its files. DNG acts as a universal container for raw sensor data. It preserves all the original image information—just like a proprietary raw file—but wraps it in a standardized, publicly documented structure. This ensures that your photos will remain readable by software decades from now, even if the camera manufacturer goes out of business.
DNG is based on the TIFF/EP standard. It stores the raw sensor data (Bayer pattern or X-Trans) along with metadata defining how that data should be interpreted (color matrices, white balance, linearization tables). Uniquely, DNG also supports 'Linear DNG' (partially processed/demosaiced data) and 'Lossy DNG' (which applies JPEG-like compression to raw data, significantly reducing file size while retaining raw editing flexibility).
Adobe launched DNG in 2004. While initially met with skepticism, it has been adopted natively by several manufacturers (Leica, Pentax, Hasselblad, and most smartphones including iPhone and Pixel) and is the standard format for mobile raw photography.
PNG-64 (64-bit RGBA)
The ultimate format for transparency precision in VFX and compositing.
PNG-64 is the heavyweight champion of the PNG family. It combines the 16-bit per channel color depth of PNG-48 with a 16-bit alpha channel. This provides 65,536 levels of transparency, compared to just 256 levels in a standard PNG-32. This format is almost exclusively used in high-end visual effects (VFX), 3D rendering, and professional compositing. When you are rendering a CGI character to place into a movie scene, you need the edges to blend perfectly with the background, even after heavy color grading. PNG-64's 16-bit alpha channel ensures that semi-transparent pixels (like motion blur or hair) retain enough data to be manipulated without becoming jagged or discolored.
A PNG-64 file contains four channels: Red, Green, Blue, and Alpha. Each is 16 bits deep (16 x 4 = 64 bits). The 16-bit alpha channel is the defining feature. In an 8-bit alpha channel (PNG-32), a very faint shadow might only have 3 or 4 levels of transparency steps, leading to visible banding when contrast is increased. In a 16-bit alpha channel, that same faint shadow has hundreds of steps, ensuring it remains smooth under any processing.
Like PNG-48, PNG-64 has been part of the standard since the beginning but was largely ignored by the web community due to file size. It found its niche in the 3D and video production industries as a more accessible alternative to formats like EXR or TIFF for storing intermediate render passes.
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