Base64 alphabet contains 64 characters Basic ASCII which are used to encode data. Yes, that's right, just 64 characters is enough to encode any data, of any size.

Base64 alphabet characters can be grouped into four groups:

  • Capital letters (0-25): A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
  • Lowercase letters (26-51): a B C D E F G H I J K L M N O p Q R S t U v w x y z
  • Decimal digits (52-61): 0123456789
  • Special symbols (62-63): +/

Base64 encoding is case sensitive, so when trying to decode be aware that alphabet variations can alter your entire output.

The coding Base64 it is often used when there is a need to transfer and store binary data to a device designed to work with textual data. This encoding is widely used by applications in conjunction with the XML markup language, enabling the storage of binary data in text form.

Check out the complete tables of the groups mentioned above:

Capital letters

IndexCharacter
0THE
1B
twoÇ
3D
4AND
5F
6G
7H
8I
9J
10K
11L
12M
13N
14THE
15P
16Q
17R
18s
19T
20U
21V
22W
23X
24Y
25Z

Small letters

IndexCharacter
26The
27B
28ç
29d
30and
31f
32g
33H
34i
35j
36k
37there
38m
39no
40The
41P
42what
43r
44s
45t
46u
47v
48w
49x
50y
51z

digits

IndexCharacter
520
531
54two
553
564
575
586
597
608
619

Symbols

IndexCharacter
62+
63/
2 1 voto
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