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Decoding the "Windows 1255" format

, 11 May 2009 CPOL
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An article on how to decode the "Windows 1255" format.

Decode Method


This article solves the problem of decoding the Windows 1255 encoding.


Usually, when you get Hebrew emails, the subject line is encoded in a strange way. After reading a lot of articles on the subject, I decided to rollout a decoding version of my own, which handles Base64 and plain encoding of Hebrew messages.

Using the Code

Instantiate the class with the text to decode, and use the Decode method. The static property IsWindows1255 can determine if the text is actually encoded to avoid the exception thrown by the constructor (when given a non-encoded text).

Like this:

if (Windows1255Helpers.IsWindows1255(ret))
    Windows1255Helpers helper = new Windows1255Helpers(ret);
    ret = helper.Decode();

If you have further questions, don't hesitate to send a mail. And furthermore, you can visit me (and my friends!) at our blog.

Points of Interest

I have read some specifications regarding encoding or decoding of MIME messages and subjects, and if I have missed something, please feel free to remark.

And please excuse my English if there are mistakes; I'm from Israel, and English is not my primary language.... Smile | :)


  • First version - 11.5.2009.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

maor tzivony

Israel Israel
No Biography provided

Comments and Discussions

GeneralMy vote of 1 PinmemberHoward Richards5-Aug-09 7:16 
GeneralWhere is the info PinmemberSoundman32.211-May-09 22:07 
GeneralRe: Where is the info [modified] Pinmembermaor tzivony12-May-09 13:12 
Hay there,
first, thank you for pointing out my weakness in the article,
it's my first article and in the future I'll be better.
now, for the code issue, you don't need to dig to much in the code
because i have allot remarks in it, that will guide you through,
for your question of knowing what is winsows-1255 format in a mail,
it usually coming before the text as "?windows-1255?Q?", as you can see in the code,
i am searching in every part of the message (subject,body,ext..) for this pattern by using regex(regular expressions).
warning, the pattern "?windows-1255?B?" it's something else.
hope i could help,
modified on Tuesday, May 12, 2009 6:25 PM

GeneralRe: Where is the info PinmemberShani Natav13-May-09 12:32 

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