This is a very useful hex viewer/editor which can view any file and has some handy features which
make it easier to reverse engineer binary file formats.
Screen capture of HexToolkit 2.22 (June 2011)
Works easily with large binary files of any size since only the viewed page of data is loaded.
Since the file is only accessed when loading or saving a page of data, the file is not locked.
String/byte search (string search is not case sensitive).
Goto file offset and increment/decrement by fixed amount.
Change the number of bytes per display line to make it easier to see patterns in the file.
Swap data display to show ASCII or EBCDIC characters, integers, floats, doubles, or binary.
Reload the displayed data with a single button press (changed bytes are highlighted in red).
Bytes-to-value conversion tool (integer, float, double, characters, binary, date/time) with optional byte swap. (Use Ctrl-C and Ctrl-V to copy bytes and paste them into this tool).
Built-in expression calculator (mixed hex/decimal supported) with numeric (+,-,/,*) and bit-wise operators (>>, <<, &, |, ^).
When you click on byte in the data window, the offset in the file is shown on the status bar.
Ability to write edited page of data back to the file.
Ability to export a hex dump using your chosen layout to a text file.
The ability to compare two binary files side-by-side.
A popup field layout tool which can generate C structs (Accessible from the View menu).
Ability to create a new binary file and initialise it with a specified byte pattern.
Ability to insert, delete, set or replace bytes at specified locations in file (from File menu).
Ability to enter ASCII characters directly into the hex data using notation like 'A 'B 'C
Can be added to your "Send To" menu to allow easy opening of files from Windows Explorer (See below).
Works with Windows XP, Vista, and 7. (Version 1.7 works on Windows 2000 and Windows 98 too)
For a diagram of these features click
You can leave feedback or discussion on the
HexToolkit forum. Updates are also reported here.
Available on the
Windows Store for Windows 10, or manually.
You can watch a video showing how to use HexToolkit on
Suggestion: Using Windows explorer browse to C:\Documents and Settings\xxx\SendTo (where xxx is your username) and right-click to add a new shortcut.
Set the shortcut to point to HexToolkit.exe. Now whenever you're browsing and you want to view a file in Hex Toolkit, just right-click on the file and choose SendTo -> HexToolkit.
Click here for a picture of how this works.
See also: binsieve, a command line tool for automatically revealing the data in a binary file.
Related: Hex/Dec Calculator for Android
"Very good tool. Unique in hex editors.", T.Wells, USA (2009)
Vistors since March 2007: