Freeware Guide
Program of the Month @ (April 2008)


(Hex Editor and Disk Editor)

Release: April 25, 2008
OS: Windows 95, 98, ME, NT4, 2000, XP, 2003 or Vista
Download file size: 843 kB (setup), 798 kB (portable)


HxD is a carefully designed and fast hex editor including raw disk editing, modifying foreign RAM and handling files of any size. Its clear interface offers searching/replacing, exporting, checksums/digests, insertion of byte patterns, a file shredder, concatenation or splitting of files, statistics and more.

Editing works like in a text editor with functions streamlined to hide differences that are purely technical.
For example you can view a drive just as one stream, can open it under Windows 9x or Windows NT+, undo, search, save, export or whatever you could do with a file. There is no sector-limited editing that gets in your way.
The same holds true for the file size (also > 4 GB), which doesn't affect editing speed and still supports undo. Or have a look at the RAM-editor that supports data-folding on every memory section and hides by default inaccessible memory, for a better overview but keeps the real offsets.


  • Available in a portable and installable edition
  • Instant opening regardless of file-size (>4GB is no problem: opening, editing are very fast)
  • Files opened in HxD are shared liberally but safely with other applications
  • Fast searching: forward, backwards or from beginning
  • Replace function (fast even for millions of edits)
  • Search and replace support Unicode, Ansi-text and Hex-values
  • Disk-Editor: RAW reading and writing of disks and drives (hard disks, floppy disks, USB-disks, CD-ROM, ...) for Win9x, WinNT and higher
  • RAM-Editor: can read and write virtual memory of other processes
  • Data-folding for better overview in RAM-Editor
  • Exporting of data to source code (Pascal, C, Java) or as formatted output (plain text, HTML, Richtext, TeX) or to hex formats:
    Motorola S19 Records, Motorola S28 Records, Motorola S37 Records, 16 Bit Intel Hex, 20 Bit Intel Hex, 32 Bit Intel Hex
  • Checksum-Generator: Checksum-8, Checksum-16, Checksum-24, Checksum-32, CRC-16, CRC-16 CCITT, CRC-32, Custom CRC, SHA-1, SHA-256, SHA-384, SHA-512, MD-2, MD-4, MD5
  • Insertion of byte patterns
  • File shredder for safe file deletion
  • Splitting or concatenating of files
  • File compare (simple)
  • Statistical view: Graphical representation of the character distribution. Helps to identify the data-type of a selection.
  • Support for ANSI, DOS/IBM-ASCII, EBCDIC and Macintosh charsets
  • Byte grouping (1, 2, 4, 8 or 16 bytes packed together in one column)
  • Hex only or text only mode
  • Progress-window displays on long time operations (shows remaining time and has a cancel-button)
  • Unlimited undo
  • Modified data is highlighted
  • Internet update checker
  • Easy to use interface with modern icons
  • Ghost caret: displayed around the corresponding character/hex value on the inactive column, the caret is placed on the active column
  • Goto address
  • Printing
  • Overwrite or Insert Mode
  • Cut, Copy, Paste Insert, Paste Write
  • Clipboard support for other hex editors (Visual Studio/Visual C++, WinHex, HexWorkshop, ...)
  • Bookmarks: Ctrl+Shift+Number(0-9) sets a bookmark, Ctrl+Number(0-9) goes to a bookmark
  • Navigating to nibbles with Ctrl+Left or Ctrl+Right
  • Flicker free display and fast drawing

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