Gzip in particular has more something akin to a size checksum appended at the end, i.e., decompressed size modulo 2^32. This is not very helpful, especially as

Gzip in particular has more something akin to a size checksum appended at the end, i.e., decompressed size modulo 2^32. This is not very helpful, especially as the maximum compression ratio is ~1032, it means that this "size" could already overflow for a gzip file that is only 4 MiB in compressed size. https://stackoverflow.com/a/69353889/2191065 https://stackoverflow.com/a/69353889/2191065