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Free Open Source:

Swiss File Knife

a command line
multi function tool.

remove tabs
list dir sizes
find text
filter lines
find in path
collect text
instant ftp or
http server
file transfer
send text
patch text
patch binary
run own cmd
convert crlf
dup file find
md5 lists
fromto clip
split files
list latest
compare dirs
save typing
trace http
echo colors
head & tail
dep. listing
find classes
speed shell
zip search
zip dir list

Depeche View
Source Research
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windows GUI

command line
file encryption

free external tools,
zero install effort,
usb stick compliant:

zip and unzip
diff and merge
reformat xml
reformat source

cpp sources

log tracing
mem tracing
using printf


stat. c array
stat. java array
var. c array
var. java array
view all text
as you type
surf over text
find by click
quick copy
multi view
find nearby
find by path
location jump
skip accents
clip match
filter lines
edit text
load filter
hotkey list
receive text
send in C++
send in Java
smooth scroll
touch scroll
fly wxWidgets
fly over Qt
search Java

Supersonic Text File Search - Free Download

How to get zip and unzip on the windows command line for quick creation and extraction of zip compressed files.

Download the free Windows executables: (for Linux, see below)

  • to extract zip files on the command line, download unzip.exe here.

    this file is a copy of the original Info-ZIP unzip.exe version 5.52, provided for free under the Info-ZIP license. Alternatively, you may download it via the original Info-ZIP website.

    How to use unzip? Read the examples below.

  • to create zip files on the command line, download zip.exe here.

    this file is a copy of the original Info-ZIP zip.exe version 2.32, provided for free under the Info-ZIP license. Alternatively, you may download it via the original Info-ZIP website.

    How to use zip? Read the examples below.

  • to create or extract zip files more flexible, like
    • include or exclude sub folders or filenames
    • zip only files changed today, or in the last 3 days
    • with full UTF-8 unicode filename support
    download Swiss File Knife here. Then type sfk zip or sfk unzip and read the examples.

    this tool is created and maintained only by this website,, and not associated with Info-ZIP. Swiss File Knife Base is Free Open Source, BSD licensed. (more)

  • to extract .tar.gz and .tar.bz2 files under windows, download:

    gzip.exe1.3.12a copy from
    bzip2.exe1.0.5a copy from
    tar.exe a copy from

    All binaries can be used instantly, requiring no further DLL's.
    Some command examples:

    gzip -d foo.tar.gzuncompresses foo.tar.gz, replacing it by foo.tar
    bzip2 -d foo.tar.bz2uncompresses foo.tar.bz2, replacing it by foo.tar
    tar tvf foo.tarlists the contents of foo.tar
    tar xvf foo.tarextracts the contents of foo.tar

Free Linux command line executables for download:

Further zip tools of possible interest:

Although not discussed here, it should be mentioned that the original Info-ZIP homepage provides further tools, e.g. for the creation of self-extracting zips, gzip and zipsplit, and of course zip/unzip binaries for many other operating systems.

Examples how to use zip:

   zip -r mydir
collects all content from mydir into actually it is sufficient to say:
   zip -r mydir mydir
which does the same. and with command line completion, you just have to type:
   zip -r my{TAB} my{TAB}
where {TAB} means pressing the TAB key. this is definitely faster than clicking in a GUI.

Examples how to use unzip:

   unzip -l
lists the contents of without extracting it. this way you see if the .zip contains a path for extraction, e.g.
unzip -l

 Length    Date   Time    Name
-------    ----   ----    ----
      0  02.09.06 13:34   testfiles/
    197  02.09.06 13:34   testfiles/readme.txt
      0  02.09.06 13:34   testfiles/FooBank/
      0  02.09.06 13:34   testfiles/FooBank/BarDriver/
      0  02.09.06 13:34   testfiles/FooBank/BarDriver/include/
    219  02.09.06 13:34   testfiles/FooBank/BarDriver/include/BarBottle.hpp
    244  02.09.06 13:34   testfiles/FooBank/BarDriver/include/BarDriver.hpp
    216  02.09.06 13:34   testfiles/FooBank/BarDriver/include/BarGlass.hpp
    210  02.09.06 13:34   testfiles/FooBank/BarDriver/include/BarMug.hpp
as you see in this case, "unzip" would create a directory "testfiles", where all content is placed into. so you don't have to create such a directory before.
   unzip -t
tests the contents of without extracting. makes sense after a copy from/to usb stick, to check if all data is still intact. finally,
really extracts the zipfile contents.

Example for searching through zip file contents:

   zzfind -pat public class -dir -file .java
searches all .java files within for lines with the words "public" AND "class".
Note that zzfind can also search files in a zip within a zip (nested zips).

How to list nested zip file contents (zips or jars within zips):

For example, if you download the Eclipse SDK and type

   unzip -l
you get a listing of less than 2000 files, listing also .jar file names. But how can you also list what is inside the .jar files, without the need to extract everything first?

Download Swiss File Knife Base, then type:

   sfk list -arc
This will produce a listing of all files, no matter how deeply nested - in total nearly 70000 lines that can be very long, for example:\\eclipse\plugins

The above is the text of a single line (filename), split into 4 lines here for better reading.

As you can see, there is a .class file in a .jar within another .jar within the .zip.

Limitations: SFK may not be able to process very large zip files, zip files with an unusual compression method, or 64 bit zip files. Type sfk help xe to list all limitations.

How to list the contents of all .zip files in all subdirectories:

In the example above, we listed the content of a single zip file. But sfk can also list the contents of all .zip, .jar, .ear, .war and .aar files in a directory tree. type:

   sfk list -arc .
and get the most comprehensive listing of all files, all .zip (.jar etc) file contents
and even zip contents embedded within other zips.

Flexible file selection for zipping, using sfk:

If you don't want to zip all files of a directory tree, but for example

  • files that changed today, or since a date
  • files with a specific file extension
  • all files except those in subdirectories \save\ and \tmp\
  • files that are different compared to another directory

then you have to prepare a file list with the swiss file knife, and send this to the zip tool through zip's option -@ (read file list from standard input).

example: zipping files changed today

sfk list project -since today | zip -@

   adding: project/FooBank/DB/include/DBController.hpp (deflated 34%)
   adding: project/FooBank/DB/source/DBController.cpp (deflated 48%)
   adding: project/FooBank/GUI/include/FooGUI.hpp (deflated 30%)
   adding: project/FooBank/GUI/source/FooGUI.cpp (deflated 42%)

four files were changed today, so only those are packed into

example: including/excluding by filename

sfk list -dir docs !\tmp\ -file .txt !-save. | zip -@

   adding: docs/Formats/01-native-tab-crlf.txt (deflated 49%)
   adding: docs/Formats/02-crlf.txt (deflated 49%)
   adding: docs/Formats/03-native-tab-lf.txt (deflated 49%)
   adding: docs/Formats/04-lf.txt (deflated 49%)
   adding: docs/Formats/05-split-text.txt (deflated 41%)
   adding: docs/Formats/07-filter-src.txt (deflated 41%)
   adding: docs/Formats/08-head-tail.txt (deflated 49%)
   adding: docs/Formats/09 blank file name.txt (stored 0%)
   adding: docs/readme.txt (deflated 24%)

only files with extension .txt are collected from the docs directory, excluding files

  • which are located in any subdirectory named "tmp"
  • having "-save." in their name

the example uses sfk for windows syntax.
linux users have to type ":" instead of "!".

example: comparing directories

we have two directory trees, "docs" and "docs-old". the latter one is a copy of docs, made some days ago. meanwhile, there have been changes in "docs". but what changes?

sfk list -sincedir docs-old docs

   [add] docs\addendum01.txt
   [add] docs\drivers\spec01.txt
   [add] docs\drivers\spec02.txt
   [add] docs\drivers\spec03.txt
   [dif] docs\FooBank\DB\source\DBController.cpp
   [dif] docs\FooBank\GUI\include\FooGUI.hpp
   [add] docs\tecnotes.txt

this command only lists what has changed so far:

  • some files have been added.
  • some files have differences, i.e. have been edited meanwhile.

so let's collect all these differences into a .zip. notice that zip would be irritated by the [add] and [dif] prefixes in each line, therefore we have to add sfk option -pure:

sfk list -pure -sincedir docs-old docs


now let's send this to zip:

sfk list -pure -sincedir docs-old docs | zip -@

   adding: docs/addendum01.txt (stored 0%)
   adding: docs/drivers/spec01.txt (stored 0%)
   adding: docs/drivers/spec02.txt (stored 0%)
   adding: docs/drivers/spec03.txt (stored 0%)
   adding: docs/FooBank/DB/source/DBController.cpp (deflated 48%)
   adding: docs/FooBank/GUI/include/FooGUI.hpp (deflated 30%)
   adding: docs/tecnotes.txt (stored 0%)

NTFS and ZIP - execution prevention problem:

i experienced one small problem when using the command-line (un)zip together with NTFS file systems; in short terms, after unzipping ".msi" files, I was unable to install software from these files. windows complained that access to the files was not possible or denied (due to some "execution prevention" mechanism introducted with XP SP2). this was probably because i zipped those files from a FAT partition (maybe even with an older zip tool) and then unzipped them on NTFS. the solution was to copy the files to a partition with FAT(32) file system, e.g. an USB stick, and then to run the installer from there.

NTFS and ZIP - filetime jumps:

another issue concerns filetimes, especially when zipping/unzipping accross FAT and NTFS partitions. in short terms, if you zip files from a FAT partition, then unpack this .zip on an NTFS partition, you always have to expect that the filetimes may be changed globally by a few hours. This is not at all a bug in the zip tool - it's due to the way that NTFS manages filetimes internally. in case you're irritated by this, try the following: 1) remember the filetimes in some directory on an NTFS partition. 2) change the date of your system from summer to winter time, or vice versa 3) have a look again at the filetimes and be shocked: all file times have jumped by one hour! so this is not a zip-specific problem, but it may show up when you compare times listed in a .zip file with those of the files actually created.