This library converts mongo ids into base64 strings. It has no dependencies and works in all browsers.

• toBase64(mongoIdStr)
  • Input: A Mongo id or 24-character hex string
  • Output: A 16-character base 64 string
• toHex(shortedIdStr)
  • Input: A 16-character base 64 string
  • Output: A 24-character hex string

The chosen base 64 encoding uses the following system. The characters were chosen to match common base 64 encoding schemes, but to be URL-safe.

• 0 - A
• 1 - B
• 2 - C
• 3 - D
• 4 - E
• 5 - F
• 6 - G
• 7 - H
• 8 - I
• 9 - J
• 10 - K
• 11 - L
• 12 - M
• 13 - N
• 14 - O
• 15 - P
• 16 - Q
• 17 - R
• 18 - S
• 19 - T
• 20 - U
• 21 - V
• 22 - W
• 23 - X
• 24 - Y
• 25 - Z
• 26 - a
• 27 - b
• 28 - c
• 29 - d
• 30 - e
• 31 - f
• 32 - g
• 33 - h
• 34 - i
• 35 - j
• 36 - k
• 37 - l
• 38 - m
• 39 - n
• 40 - o
• 41 - p
• 42 - q
• 43 - r
• 44 - s
• 45 - t
• 46 - u
• 47 - v
• 48 - w
• 49 - x
• 50 - y
• 51 - z
• 52 - 0
• 53 - 1
• 54 - 2
• 55 - 3
• 56 - 4
• 57 - 5
• 58 - 6
• 59 - 7
• 60 - 8
• 61 - 9
• 62 - _
• 63 - -