Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I found this, and want to know what it decodes to and what type of encoding it is:

share|improve this question
up vote 17 down vote accepted

It is, as I expected, Base64. You can recognize it by the equal sign at the end. It translates to some sort of email address:

If you want to know more about Base64, there is a great Wikipedia article.

share|improve this answer
Quick clarification: Base64 doesn't always have an equal sign in it, but = or + are signals that it's probably base64. – Christian Mann Jan 14 '12 at 23:23
Didn't know the + sign was used as well. The chance of it containing an equal sign is 2/3 by the way, as it's a space filler for incomplete 3-byte sequences. – Simon Verbeke Jan 14 '12 at 23:26
VGhhbmtzISAuLi4uYW5kIHNvcnJ5LCBTbmFwSm95IDsp – Nathan J. Brauer Jan 14 '12 at 23:48
@NathanJ.Brauer Is this question and your comment a very geeky kind of spam? :) – Marek Grzenkowicz Jan 19 '12 at 15:26
Heh, no, I'm not that smart. ;) Really, I just wanted to decode their jobs puzzle but was too tired to figure it out completely on my own. – Nathan J. Brauer Jan 26 '12 at 19:35

The encoding is called Base64, and it decodes to some email address.

share|improve this answer

When in need of detailed and specific information about an Internet standard I always look and see if there's an RFC (Request For Comments) for it. For the Base64-encoding, take a look at this document: The Base16, Base32, and Base64 Data Encodings (RFC 4648).

@Simon Verbeke: There are two versions of the Base64 alphabet. Take a look at the following tables in the RFC 4648.

"Table 1: The Base 64 Alphabet" ("base64")

"Table 2: The "URL and Filename safe" Base 64 Alphabet" ("base64url")

NOTE: The "base64url" encoding should not be regarded as the same as the "base64" encoding and should not be referred to as only "base64".

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.