What is Base94 encoding and how does it work?

Question

I googled and could not find much information on Base94 encoding. Does anyone has more details about this encoding?

No. Base94 and Base64 are 2 different encodings. – Jay P Mar 19 '18 at 17:19 — Jay P, Mar 19 '18 at 17:19

score 6 · Answer 1 · edited Sep 07 '22 at 14:05

6

Essentially: Base94 encoding takes 9 input bytes of 8 bits each, uses those to construct a 72-bit integer, and then converts that to an 11-digit base-94 number, and encodes that number using the ASCII characters ! (33) through ~ (126):

!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~

Here is some example code that someone published on GitHub:

https://gist.github.com/iso2022jp/4054241

edited Sep 07 '22 at 14:05

masterxilo

2,503
1
30
35

answered Mar 21 '18 at 04:53

Todd Lehman

2,880
1
26
32

1

Would it be possible to share an example for this please? – Jay P Mar 21 '18 at 16:57
@JayP — ok, added a link above. Hope that helps. It doesn't contain examples of input/output, but does appear to have a test case built in. – Todd Lehman Mar 21 '18 at 18:52
3

Isn't ASCII char 33 `!` and not `1`? – BenMorel Apr 14 '19 at 20:57
1

@Benjamin — HA! YES. THANK YOU. Man, that's the first time I've ever accidentally typed `1` by accident when I meant to type `!`. Usually it's the other way around. – Todd Lehman Apr 15 '19 at 17:44

What is Base94 encoding and how does it work?

1 Answers1