Move simg2img.exe into a working folder (e.g., C:\Android\ ). Place your sparse image (e.g., system_sparse.img ) in the same folder.
Simg2img (Sparse Image to Image) is a command-line utility designed specifically to convert into raw images . Manufacturers use sparse images to save bandwidth and storage space. While a raw image contains every single byte of a partition (including empty zeros), a sparse image compresses those empty blocks. Simg2img.exe Download
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For a more comprehensive set of utilities, the Android_IMG_Tools_Cygwin repository includes simg2img.exe along with related tools like img2simg.exe and make_ext4fs.exe . Move simg2img