|HTTP Content Coding Token||gzip||deflate||compress|
|An encoding format produced by the file compression program "gzip" (GNU zip)||The "zlib" format as described in RFC 1950.||The encoding format produced by the common UNIX file compression program "compress".|
|Data Format||GZIP file format||ZLIB Compressed Data Format||The compress program's file format|
|Compression Method||Deflate compression method||LZW|
|Deflate consists of LZ77 and Huffman coding|
Compress doesn't seem to be supported by popular current browsers, possibly due to its past with patents.
Deflate isn't done correctly all the time. Some servers would send the deflate data format instead of the zlib data format and at least some versions of Internet Explorer expect deflate data format instead of zlib data format.
I've just updated Encode-O-Matic with a Guess Input Encoding feature. When you start Encode-O-Matic or when you use the 'Guess Input Encoding' menu item from the 'Tools' menu, Encode-O-Matic will try out various combinations of encodings and guess at which set seem to apply to your input. For instance given the following text, Encode-O-Matic will correctly guess that it is percent encoded, base64 encoded, deflate compressed text:
It should work fairly well for simple things but I did pick 'Guess' for the name of the feature to intentionally lower expectations. It doesn't currently apply to character encodings but that may be something to consider in the future.
I've just put up an update for Encode-O-Matic with the following improvements: