Gzip and Base64

Good to know

• gzip, deflate and deflate-raw are the three the platform provides. Brotli is not among them — asking for it throws, so it is not offered.
• The three differ only in what wraps the compressed data: gzip adds a header and a CRC, zlib deflate a two-byte header and a checksum, raw deflate nothing at all.
• Short text comes out larger than it went in, and that is correct: the header and checksum cost more than the compression saves until there is enough repetition to find.
• Compression happens in your browser, in a stream. Nothing you paste is sent anywhere.