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Overview of Many Popular Binary-to-Text Encodings and their properties.
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| ## Binary | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 12.5 % (1 bit/char), 1 bit segments β | |
| β 32/64/128 bit β 1-32/1-64/1-128 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β number encoding, debugging β | |
| β Alphabet β 01 β | |
| β Known Usages β none β | |
| β Standardization β none β | |
| β Example β 11010011 01111000 01101100 10010011 01111110 01111111 00111000 β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Octal | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 37.5 % (3 bit/char), 24 bit segments β | |
| β 32/64/128 bit β 1-11/1-22/1-43 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β number encoding β | |
| β Alphabet β 01234567 β | |
| β Known Usages β chmod β | |
| β Standardization β none β | |
| β Example β 703767722333074323 β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Dec | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 41.5 % (3.32 bit/char) β | |
| β 32/64/128 bit β 1-10/1-20/1-39 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β number encoding β | |
| β Alphabet β 0123456789 β | |
| β Known Usages β single byte representations β | |
| β Standardization β none β | |
| β Example β 15902780311763155 β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Hex | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 50 % (4 bit/char), 8 bit segments β | |
| β 32/64/128 bit β 8/16/32 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β true β | |
| β Suited for β number & byte-string encoding β | |
| β Alphabet β 0123456789abcdef β | |
| β Known Usages β widely used, e.g. UUIDs, cryptographic keys, ... β | |
| β Standardization β RFC 4648 β | |
| β Example β 387f7e936c78d3 β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base26 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 58.8 % (4.70 bit/char) β | |
| β 32/64/128 bit β 7/14/28 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β true β | |
| β Suited for β byte-string encoding β | |
| β Alphabet β ABCDEFGHIJKLMNOPQRSTUVWXYZ β | |
| β Known Usages β none β | |
| β Standardization β none β | |
| β Example β EIQYWQEAJRFF β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base32 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 62.5 % (5 bit/char), 40 bit segments β | |
| β 32/64/128 bit β 7+1/13+3/26+6 chars (+padding) β | |
| β Padding β true β | |
| β Const. Out. Len.β true β | |
| β Suited for β byte-string encoding β | |
| β Alphabet β ABCDEFGHIJKLMNOPQRSTUVWXYZ234567 β | |
| β Known Usages β none β | |
| β Standardization β RFC 4648 β | |
| β Variations β z-base-32, Crockford's Base32, base32hex, Geohash β | |
| β Example β HB7X5E3MPDJQ β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base36 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 64.6 % (5.17 bit/char) β | |
| β 32/64/128 bit β 1-7/1-13/1-25 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β big integer encoding β | |
| β Alphabet β 0123456789abcdefghijklmnopqrstuvwxyz β | |
| β Known Usages β Reddit Url Slugs β | |
| β Standardization β none β | |
| β Example β 4cl2cf404wj β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base58 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 73.2 % (5.86 bit/char) β | |
| β 32/64/128 bit β 6/11/22 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β big integer encoding β | |
| β Alphabet β 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz β | |
| β Known Usages β Bitcoin, IFPS β | |
| β Standardization β none β | |
| β Variations β flicker short-urls β | |
| β Example β 39BQ5CdzFL β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base64 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 75 % (6 bit/char), 24 bit segments β | |
| β 32/64/128 bit β 6+2/11+1/22+2 chars (+padding) β | |
| β Padding β true β | |
| β Const. Out. Len.β true β | |
| β Suited for β byte-string encoding β | |
| β Alphabet β ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ β | |
| β (url-safe) β ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_ β | |
| β Known Usages β practically everywhere β | |
| β Standardization β RFC 4648 (previously RFC 3548) β | |
| β Variations β RFC 4880, RFC 1421, RFC 2152, RFC 3501, bcrypt radix64 β | |
| β Example β OH9-k2x40w β | |
| β β OH9+k2x40w (url-safe) β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Ascii85 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 80.1 % (6.41 bit/char) β | |
| | 32/64/128 bit β 1-5/2-10/4-20 chars β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β byte-string encoding β | |
| β Alphabet β 123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz β | |
| β Known Usages β Git, Adobe PDF and PostScript β | |
| β Variations β ZeroMQ, ZMODEM, btoa, Adobe, RFC 1924 β | |
| β Example β 3.HC@Cj=D β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| ## Base122 | |
| βββββββββββββββββββ¬βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ | |
| β Efficiency β 86.6 % (6.93 bit/char) β | |
| | 32/64/128 bit β ? β | |
| β Padding β false β | |
| β Const. Out. Len.β false β | |
| β Suited for β embedding blobs in HTML (experimental) β | |
| β Alphabet β full 7bit minus some reserved chars (UTF-8 compatible) β | |
| β Known Usages β none β | |
| β Example β οΏ½οΏ½vοΏ½~οΏ½ β | |
| βββββββββββββββββββ΄βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ |
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