RapidCRC Unicode

RapidCRC is an open source CRC/MD5/SHA hashing program. I've extended the current unicode support to allow writing of unicode .sfv/.md5/.sha1/.sha256/.sha512 files, which can be turned on/off through the settings page. Unicode sfv files are written as UTF-16LE with BOM or UTF-8 (with or without BOM), and RCRC now performs a codepage detection. I've also expanded the shell extension that was included in the sourcecode to enable all operations directly from the extension.

List of other new features:

  • multithreaded hash calculations with asynchronous I/O
  • ed2k hash calculation
  • SHA hash calculation
  • job queueing
  • popup menu to copy the calculated hashes to the clipboard

RapidCRC is released under the GPL - the sourcecode with my modifications can be found below. Be warned however that my documentation in the sourcecode is not as good as the original RapidCRC source.

LM from www.portablefreeware.com made a nice introductory video about RapidCRC:
YouTube Link



posted on 02/20/2013 - 21:22
  • Fixed CRC column-click sorting
  • Greatly reduced memory usage caused by extended path support
  • Added command to recursively open all hash files via the shell extension or the vista+ open file menu (dropdown on the open button)


posted on 12/31/2012 - 14:55
  • Fixed column-click sorting
  • Fixed default directory in "one for all" mode (also works in drive roots)


posted on 11/26/2012 - 21:56
  • fixed control overlap (play/pause, status field)
  • sha256/512 buttons are now correctly disabled during calculation


posted on 11/22/2012 - 19:40
  • fix reading of hash files with normal slash characters for folder separators
  • adjusted button position + combo box size for xp
  • restored default directory in "one for all files" mode
  • added logic to load options from rcrc dir if options file exists


posted on 10/15/2012 - 21:42
  • fixed sfv file creation


posted on 10/11/2012 - 01:15
  • added sha256/512 support (hash calculation and file verification)
  • fixed reparenting


posted on 09/14/2012 - 00:46
  • fixed "one checksum file per dir" mode
  • file comments now work in all modes


posted on 09/11/2012 - 21:52
  • fixed 64bit build
  • support for path longer than 255 characters
  • column sort direction displayed in column header
  • optional file comments with size and modification time
  • updated status display, is now always present and updated during job processing
  • add option to force utf-8/system codepage


posted on 05/27/2012 - 22:49
  • Fix button sizes pre vista, reduce control flicker on resize
  • Add listview context menu option to hide verified files


posted on 03/19/2012 - 16:15

This is simply a rerelease post of 0.3.3 on the new site.


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