![]() an 8-byte trailer, containing a CRC-32 checksum and the length of the original uncompressed data, modulo 2 32.a body, containing a DEFLATE-compressed payload.optional extra headers as allowed by the header flags, including the original filename, a comment field, an "extra" field, and the lower half of a CRC-32 checksum for the header section.a 10-byte header, containing a magic number ( 1f 8b), the compression method ( 08 for DEFLATE), 1-byte of header flags, a 4-byte timestamp, compression flags and the operating system ID."gzip" is often also used to refer to the gzip file format, which is: ![]() DEFLATE was intended as a replacement for LZW and other patent-encumbered data compression algorithms which, at the time, limited the usability of compress and other popular archivers. Gzip is based on the DEFLATE algorithm, which is a combination of LZ77 and Huffman coding.
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