Encoders & Decoders

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	What's this page for? What does this page have?
1.	I am tired of replying so many people who suffered from this problem on Internet So, I decided to make this page to help them.
2.	This page will teach you how to decode some emails which look like some alien words.
3.	Since I am more familiar with Windows(3.x, 95), DOS, and Unix, the materials covered here will concentrate on these OS more. For OS/2 or Mac users, please give me any comments so that I can add those HOW-TO here, and make this page more helpful.
4.	I am not a computer expert. So, if you feel this page is too easy for you, please be patient, and please teach me about what I don't know, or correct any wrong information covered in this page. I will include your advice and name into this page to help more people.
5.	All the softwares and links covered in this page may be upgraded often. if you find any links has expired or not available anymore, please notify me.

DOS

Homepage UU BASE64

UUDeview
0.5d for DOS encode uuenview -u in_files uuenview -b in_files

decode uudeview in_files

uudeview can decode non-header base64 encoding file
files base64-encoded by uuenview has no standard MIME header format. So, I don't recomment using uuenview to encode a file into base64 format.
uudeview is recommended for UU/B64 decoding.

Homepage	UU	BASE64
UUDeview 0.5d for DOS	encode	uuenview -u in_files	uuenview -b in_files
decode	uudeview in_files
uudeview can decode non-header base64 encoding file files base64-encoded by uuenview has no standard MIME header format. So, I don't recomment using uuenview to encode a file into base64 format. uudeview is recommended for UU/B64 decoding.

Homepage UU BASE64

MPack
v1.5 for DOS encode can't uuencode mpack -o out_file in_file

decode munpack in_files

mpack can create good header information for BASE64 encoding.
munpack can decode both B64 & UU encoded files. However, when it is used for uudecoding, it will get a filename named infile.1, instead of the original encoded file name in the header [begin 644 original_filenam e ].
mpack is recommended for base64-encoding.

Homepage	UU	BASE64
MPack v1.5 for DOS	encode	can't uuencode	mpack -o out_file in_file
decode	munpack in_files
mpack can create good header information for BASE64 encoding. munpack can decode both B64 & UU encoded files. However, when it is used for uudecoding, it will get a filename named infile.1, instead of the original encoded file name in the header [begin 644 original_filenam e ]. mpack is recommended for base64-encoding.

Homepage UU BASE64

MIME64
for DOS encode can't uuencode
can't uudecode mime64 in_file out_file -e

decode mime64 in_files [out_file]

mime64 can decode non-header base64 encoding file
mime64 can create good header information for BASE64 encoding
mime64 is recommended for base64-decoding

Homepage	UU	BASE64
MIME64 for DOS	encode	can't uuencode can't uudecode	mime64 in_file out_file -e
decode	mime64 in_files [out_file]
mime64 can decode non-header base64 encoding file mime64 can create good header information for BASE64 encoding mime64 is recommended for base64-decoding

Homepage QP

MIMEQP
for DOS encode mimeqp in_file out_file -e

decode mimeqp in_files out_file

mimeqp can only en/decode Quoted-Printable format.

Homepage	QP
MIMEQP for DOS	encode	mimeqp in_file out_file -e
decode	mimeqp in_files out_file
mimeqp can only en/decode Quoted-Printable format.

Homepage QP

CNVT_QP
for DOS encode cnvt_qp , 8bit->QP

decode cnvt_qp , QP->8bit

cnvt_qp can only en/decode Quoted-Printable format.

Homepage	QP
CNVT_QP for DOS	encode	cnvt_qp , 8bit->QP
decode	cnvt_qp , QP->8bit
cnvt_qp can only en/decode Quoted-Printable format.

Other DOS Programs

UDEC1_2
can encode (uenc), decode (udec), UU/B64/Binhex format
very good program, but is a shareware for 30day free use. $20

UUEXE
can encode (uuencode) UU/B64 format, decode (uudecode) UU/B64
good program, but decoding B64 format needs to send authour $20 first

Tons of MSDOS EN/DEcoder can be found at Simtelnet DOS

Other DOS Programs
UDEC1_2	can encode (uenc), decode (udec), UU/B64/Binhex format very good program, but is a shareware for 30day free use. $20
UUEXE	can encode (uuencode) UU/B64 format, decode (uudecode) UU/B64 good program, but decoding B64 format needs to send authour $20 first
Tons of MSDOS EN/DEcoder can be found at Simtelnet DOS

WIN

Homepage UU BASE64

UUDeview
1.1a for WIN(16bit) 1.2 for Win(32bit) encode Good Fine, but with non-standard header

decode Very Good

uudeview can decode non-header base64 encoding file
files base64-encoded by uuenview has no standard MIME header format. So, I don't recomment using uuenview to encode a file into base64 format.
uudeview is recommended for UU/B64 decoding. It is an excellent Freeware for beginner..

Homepage	UU	BASE64
UUDeview 1.1a for WIN(16bit) 1.2 for Win(32bit)	encode	Good	Fine, but with non-standard header
decode	Very Good
uudeview can decode non-header base64 encoding file files base64-encoded by uuenview has no standard MIME header format. So, I don't recomment using uuenview to encode a file into base64 format. uudeview is recommended for UU/B64 decoding. It is an excellent Freeware for beginner..

Homepage UU BASE64

WinZip6.3
for 95 & for 31 encode Good Good

decode Very Good, but must name the file extention as .uue Very Good, but must name the file extention as .b64

WinZip6.2 can decode non-header base64 encoding file
We have to name the file extention appropriately for decoding.
for uudecode, we need .uue; for base64-decode , we need .b64;
WinZip6.2 is an excellent shareware, so, you have to pay for registration. It is good for advanced user.

Homepage	UU	BASE64
WinZip6.3 for 95 & for 31	encode	Good	Good
decode	Very Good, but must name the file extention as .uue	Very Good, but must name the file extention as .b64
WinZip6.2 can decode non-header base64 encoding file We have to name the file extention appropriately for decoding. for uudecode, we need .uue; for base64-decode , we need .b64; WinZip6.2 is an excellent shareware, so, you have to pay for registration. It is good for advanced user.

Homepage UU BASE64

Xferpro 1.1.2(16bit) 2.0.0(32bit) encode Good Good

decode Very Good Very Good

Xferp will automatically identify the header information of the file for decoding.
Xferp is an excellent shareware, so, you have to pay for registration. It is excellent for beginner.

Homepage	UU	BASE64
Xferpro 1.1.2(16bit) 2.0.0(32bit)	encode	Good	Good
decode	Very Good	Very Good
Xferp will automatically identify the header information of the file for decoding. Xferp is an excellent shareware, so, you have to pay for registration. It is excellent for beginner.

Homepage UU BASE64

WinPack 2.0 encode Good Good

decode Very Good Very Good

Winpack sometimes can decode non-header base64 encoding file
Winpack is similar to WinZip, but it does not need specific file extention(like .uue or .b64) for decoding.
Winpack is an excellent shareware, so, you have to pay for registration. It is good for beginner.

Homepage	UU	BASE64
WinPack 2.0	encode	Good	Good
decode	Very Good	Very Good
Winpack sometimes can decode non-header base64 encoding file Winpack is similar to WinZip, but it does not need specific file extention(like .uue or .b64) for decoding. Winpack is an excellent shareware, so, you have to pay for registration. It is good for beginner.

Homepage UU BASE64

Wincode 2.7.3c encode Good Good

decode Very Good Very Good

Wincode will automatically identify the header information of the file for decoding.
Wincode is an excellent shareware, so, you have to pay for registration. It is excellent for beginner.Note! WinCode seems won't update in the future.

Homepage	UU	BASE64
Wincode 2.7.3c	encode	Good	Good
decode	Very Good	Very Good
Wincode will automatically identify the header information of the file for decoding. Wincode is an excellent shareware, so, you have to pay for registration. It is excellent for beginner.Note! WinCode seems won't update in the future.

Other WIN Programs

Some other Win95 EN/DEcoder can be found at Simtelnet Win95

Some other Win31 EN/DEcoder can be found at Simtelnet Win31

Mixed DOS/WIN EN/DEcoder can be found at here

Other WIN Programs
Some other Win95 EN/DEcoder can be found at Simtelnet Win95
Some other Win31 EN/DEcoder can be found at Simtelnet Win31
Mixed DOS/WIN EN/DEcoder can be found at here

UNIX

u u e n/d e c o d e

E N c o d i n g D E c o d i n g

For a file named xxx
To uuencode xxx into a new file named zzz

uuencode xxx yyy >& zzz

Then, xxx will be uuencoded into zzz
For an uuencoded file named zzz
if its 1st line is "begin 644 yyy"
last 2nd line is "`"
and last line is "end"
To uudecode zzz

uudecode zzz

Then, yyy will be uudecoded from zzz

the 1st line of zzz should be
"begin 644 yyy"
the last 2nd line of zzz should be "`"
the last line of zzz should be "end"
I have some advices for you here if you want to use uuencode.
to uudecode a non-header file:
1. must add the header
"begin ### new_filename" in the 1st line
2. add "`" in the last 2nd line 3. add "end" in the last line before you decode it.

u u e n/d e c o d e
E N c o d i n g	D E c o d i n g
For a file named xxx To uuencode xxx into a new file named zzz uuencode xxx yyy >& zzz Then, xxx will be *uuencoded* into zzz	For an *uuencoded* file named zzz if its 1st line is "begin 644 yyy" last 2nd line is "`" and last line is "end" To uudecode zzz uudecode zzz Then, yyy will be *uudecoded* from zzz
the 1st line of zzz should be "begin 644 yyy" the last 2nd line of zzz should be "`" the last line of zzz should be "end" I have some advices for you here if you want to use *uuencode*.	to *uudecode* a non-header file: 1. must add the header "begin ### new_filename" in the 1st line 2. add "`" in the last 2nd line 3. add "end" in the last line before you decode it.

U U D e v i e w 0.5p113

E N c o d i n g D E c o d i n g

For a file named xxx
To uuencode xxx into a new file zzz

uuenview -u xxx >& zzz

Then, xxx will be uuencoded into zzz
For an uuencoded file named zzz
if its 1st line is "begin 644 yyy"
the last 2nd line is `"
and last line is "end"
To uudecode zzz

uudeview zzz

Then, yyy will be uudecoded from zzz

UUDeview also has a X-Windows version, if you compiled it successfully.
It is a good uuen/decoding freeware. You can download it by clicking the header of this table.
The unix shell usage is different from its DOS version.

U U D e v i e w 0.5p113
E N c o d i n g	D E c o d i n g
For a file named xxx To uuencode xxx into a new file zzz uuenview -u xxx >& zzz Then, xxx will be *uuencoded* into zzz	For an *uuencoded* file named zzz if its 1st line is "begin 644 yyy" the last 2nd line is `" and last line is "end" To uudecode zzz uudeview zzz Then, yyy will be *uudecoded* from zzz
UUDeview also has a X-Windows version, if you compiled it successfully. It is a good uuen/decoding freeware. You can download it by clicking the header of this table. The unix shell usage is different from its DOS version.

!Note!:
To decode an uuencoded file, you do not need to remove all the header lines.
As long as the file contains "begin 644 filename" in the 1st line, "`" in t he last 2nd line, and "end", All the uudecoders can automatically detect them, and uudecode them successfully !!

BASE64

m m e n c o d e / m i m e n c o d e

E N c o d i n g D E c o d i n g

For a file named xxx
To base64-encode xxx into a new file named zzz

mmencode -b xxx >& zzz

Then, xxx will be b64-encoded into zzz
For a base64-encoded file named zzz
To base64-decode zzz into a new file, ttt

mmencode -u -b zzz >& ttt

Then, ttt will be base64-decoded from zzz

!Note!:
files base64-encoded by mmencode won't contain MIME header !!
The receiver may have trouble in decoding it without MIME header information !!
Therefore, b64-encoding by mmencode is not recommended, unless you can add the appropriate MIME header lines yourself.
!Note!:
To b64-decode a file, you must first remove all the header lines before those alien words !!

another program named mimencode has exactly the same function as mmencode !

m m e n c o d e / m i m e n c o d e
E N c o d i n g	D E c o d i n g
For a file named xxx To base64-encode xxx into a new file named zzz mmencode -b xxx >& zzz Then, xxx will be *b64-encoded* into zzz	For a *base64-encoded* file named zzz To base64-decode zzz into a new file, ttt **mmencode -u -b zzz >& ttt Then, ttt will be base64-decoded from zzz**
!Note!: files base64-encoded by mmencode won't contain MIME header !! The receiver may have trouble in decoding it without MIME header information !! Therefore, b64-encoding by mmencode is not recommended, unless you can add the appropriate MIME header lines yourself.	!Note!: To b64-decode a file, you must first remove all the header lines before those alien words !!
another program named mimencode has exactly the same function as mmencode !

m p a c k / m u n p a c k

E N c o d i n g D E c o d i n g

For a file named xxx.gif
To b64-encode xxx.gif into a new file named zzz

mpack -o zzz xxx.gif

Then, it will ask you to write Subject.
You can write the original file name, e.g. xxx.gif
Then,xxx.gif will be b64-encoded into zzz with detailed header information.
For a file named zzz
if in its content, there is some header information before luanma, like
Content-Type: image/gif; name="xxx.gif";
Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="xxx.gif"
To b64-decode zzz

munpack zzz

Then, xxx.gif will be b64-decoded from zzz

!Note!:
the sequence of in_files and out_file may confuse you, be careful !!
files encoded by mpack contains detailed MIME header.
The receiver should be able to decode this very easily by any program.
The use of Unix mpack is the same as its DOS version.
Therefore, base64-encoding by mpack is recommended. But your system may not have mpack, you can download it here, and 'make' it yourself.

munpack can only b64-decode a file which contains standard MIME header information.
you do not need to remove the header lines before alein words. munpack will automatically identify the new file_name which will be decoded out, and decode it for you.

mmunpack can also decode uuencoded files.
It is a good decoder, as long as the header information is enough.

mpack/munpack was developed by a cmu person. Some Unix machine have it built-in, some may not. It is very popular en/decoder, and you can get all the OS versions of mpack/munpack in ftp://ftp.andrew.cmu.edu/pub/m pack

U U D e v i e w 0.5p113

E N c o d i n g D E c o d i n g

For a file named xxx
To b64-encode xxx

uuenview -b xxx >& zzz

Then, xxx will be base64-encoded into zzz
zzz will have the header informatiln as right. For a b64-encoded file named zzz
if its content contains some header information before luanma, like
Content-Type: image/gif; name="xxx.gif";
Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="xxx.gif"
To b64-decode zzz

uudeview zzz

Then, xxx.gif will be base64-decoded from zzz

More uudeview information can be found in the UU part above.
The result of base64-encoding by uuenview -b is the same as mmencode -b. There is no standard header information at all.
Therefoe, uuenview is not recommended for base64-encoding

QP [Quoted-Printable]

m m e n c o d e / m i m e n c o d e

E N c o d i n g D E c o d i n g

For a file named xxx
To QP-encode xxx into a new file named zzz

mmencode -q xxx >& zzz

Then, xxx will be QP-encoded into zzz
For a QP-encoded file named zzz
To QP-decode zzz into a new file ttt

mmencode -u -q zzz >& ttt

Then, ttt will be QP-decoded from zzz

!Note!:
QP-encoding is only used when you want to send out an email with some chinese content.
to QP-decoded a file, you do not need to remove any header.
this is the only 1 QP-en/decoder I know in Unix, if you know others, please inform me. Thanks.

another program named mimencode has exactly the same function as mmencode !

m m e n c o d e / m i m e n c o d e
E N c o d i n g	D E c o d i n g
For a file named xxx To QP-encode xxx into a new file named zzz mmencode -q xxx >& zzz Then, xxx will be *QP-encoded* into zzz	For a *QP-encoded* file named zzz To QP-decode zzz into a new file ttt **mmencode -u -q zzz >& ttt Then, ttt will be QP-decoded from zzz**
!Note!: QP-encoding is only used when you want to send out an email with some chinese content. to QP-decoded a file, you do not need to remove any header. this is the only 1 QP-en/decoder I know in Unix, if you know others, please inform me. Thanks.
another program named mimencode has exactly the same function as mmencode !

MetaMail

m e t a m a i l

Basse64 / QP D E c o d i n g

For a file named xxx
as long as its content has a part like
Content-Type: image/gif; name="xxx.yyy";
Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="xxx.yyy"
or
Content-Type: text/plain; charset=BIG5
Content-Transfer-Encoding: quoted-printable

To b64-decode or QP-decode xxx into a new file zzz
metamail -y xxx >& zzz

Then, xxx will be b64-decoded or QP-decoded into zzz

!Note!:
metamail can be used for decode base64 / QP encoded files.
the content of the file to be decoded must only contain 1 set of mime format , if the content has multi-parts of mime content, it will only decode the 1st part.
Therefore, for a mail contains multi-parts of mime format, the receiver must save each part separately, keep their own mime header lines, then use metamail to decode them separately.

MAC

Some MAC Programs
mpack / munpack Mac versionftp://ftp.andrew.cmu.edu/pub/mpack
StuffIt_Expander at Aladdin Systems. Inc
QP-converter coded by Bryan Chang
The authour of UUDeview collected 5 other programs here
Mac User !! I am sorry, please tell me more such programs, so that I can add here !!

OS/2

Some OS/2 Programs
mpack / munpack OS/2 versionftp://ftp.andrew.cmu.edu/pub/mpack
some en/decoding softwares at here [b64.zip, pmbase64.zip, pmprp210.zip, pmuue144.zip, uucode17.zip]
OS/2 User !! I am sorry, please tell me more such programs, so that I can add here!!

Other

For Other OS

mpack / munpack Linux, NetBSD, Amiga, Archimedes versionftp://ftp.andrew.cmu.edu/pub/mpack

Hi !! I am sorry, please tell me more such programs, so that I can add here !!

For Other OS
mpack / munpack Linux, NetBSD, Amiga, Archimedes versionftp://ftp.andrew.cmu.edu/pub/mpack
Hi !! I am sorry, please tell me more such programs, so that I can add here !!

Encoders & Decoders

What's this page for? What does this page have?