# Base64 Encode Decode Online Tool

## What is Base64?

In simple terms, Base64 is an encryption scheme that can render text data unreadable. That's for the layman. Now to be precise, Base64 is a **binary to text** encoding scheme. It represents binary data as ASCII character string. Each Base64 digit represents 6 bits of data.

Let's understand Base64 with an example.

Let's consider the letter **T**. If we convert this letter in binary, we get eight bit representation as 01010100

If we encode these binary strings into Base64, we get:

`010101` `00`

This is because Base64 uses 6 bits to represent each binary string. If we consult Base64 table given below:

`010101` = V

In order to make the binary again eight bit, zero bit 0000 are added to the right:

010101 000000

`010101` = V`000000` = A

In Base64 empty octets are padded with = mark. In a three octets representation, the letter T occupies only one octet and the other two octets remain empty. These two empty bytes will be passded with ==

`010101` `000000` `000000` `000000`

` V ` ` A ` ` = ` ` = `

So T is equal to VA== in Base64.

## Base64 as Encryption Method

Base64 encoding is not a very strong security measure because decoding it is very easy. As it is with encoding, TechWelkin **Base64 Decoder** can easily decode Base64 and break encryption. Therefore, this method should not be used if stakes are high. It can be used just to obfuscate ordinary text.

## Base64 Table

Index | Binary | Base64 |
---|---|---|

0 | 000000 | A |

1 | 000001 | B |

2 | 000010 | C |

3 | 000011 | D |

4 | 000100 | E |

5 | 000101 | F |

6 | 000110 | G |

7 | 000111 | H |

8 | 001000 | I |

9 | 001001 | J |

10 | 001010 | K |

11 | 001011 | L |

12 | 001100 | M |

13 | 001101 | N |

14 | 001110 | O |

15 | 001111 | P |

16 | 010000 | Q |

17 | 010001 | R |

18 | 010010 | S |

19 | 010011 | T |

20 | 010100 | U |

21 | 010101 | V |

22 | 010110 | W |

23 | 010111 | X |

24 | 011000 | Y |

25 | 011001 | Z |

26 | 011010 | a |

27 | 011011 | b |

28 | 011100 | c |

29 | 011101 | d |

30 | 011110 | e |

31 | 011111 | f |

32 | 100000 | g |

33 | 100001 | h |

34 | 100010 | i |

35 | 100011 | j |

36 | 100100 | k |

37 | 100101 | l |

38 | 100110 | m |

39 | 100111 | n |

40 | 101000 | o |

41 | 101001 | p |

42 | 101010 | q |

43 | 101011 | r |

44 | 101100 | s |

45 | 101101 | t |

46 | 101110 | u |

47 | 101111 | v |

48 | 110000 | w |

49 | 110001 | x |

50 | 110010 | y |

51 | 110011 | z |

52 | 110100 | 0 |

53 | 110101 | 1 |

54 | 110110 | 2 |

55 | 110111 | 3 |

56 | 111000 | 4 |

57 | 111001 | 5 |

58 | 111010 | 6 |

59 | 111011 | 7 |

60 | 111100 | 8 |

61 | 111101 | 9 |

62 | 111110 | + |

63 | 111111 | / |

padding | = |