Base62

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Base62 is a binary-to-text encoding that represents arbitrary data (including binary data) as ASCII text. It encode data as the 62 letters and digits of ASCII – capital letters A-Z, lower case letters a-z and digits 0–9.[1][2] 

123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz
= 58 characters = base58

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
= 62 characters = base62

0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz+/
= 64 characters = base64

Alphabet

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The Base62 alphabet:

Value Char Value Char Value Char Value Char
0 0 16 G 32 W 48 m
1 1 17 H 33 X 49 n
2 2 18 I 34 Y 50 o
3 3 19 J 35 Z 51 p
4 4 20 K 36 a 52 q
5 5 21 L 37 b 53 r
6 6 22 M 38 c 54 s
7 7 23 N 39 d 55 t
8 8 24 O 40 e 56 u
9 9 25 P 41 f 57 v
10 A 26 Q 42 g 58 w
11 B 27 R 43 h 59 x
12 C 28 S 44 i 60 y
13 D 29 T 45 j 61 z
14 E 30 U 46 k
15 F 31 V 47 l

See also

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References

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  1. ^ Kejing He; Xiancheng Xu; Qiang Yue (November 19, 2008). "A secure, lossless, and compressed Base62 encoding". 2008 11th IEEE Singapore International Conference on Communication Systems. Institute of Electrical and Electronics Engineers. pp. 761–765. doi:10.1109/ICCS.2008.4737287. ISBN 978-1-4244-2423-8. S2CID 10831128. This base62 compressed encoding has been tested & The 62 alphanumeric characters (A-Z, a-z, 0–9)
  2. ^ Wu, Pei-Chi (June 18, 2001). "A base62 transformation format of ISO 10646 for multilingual identifiers". Software: Practice and Experience. 31 (12): 1125–1130. doi:10.1002/spe.408. S2CID 32472727. Retrieved August 13, 2020. within a [0–9][A–Z][a–z] range, a total of 62 base characters