CHK Checksum Utility

CHK v1.50 Screenshot


CHK is a freeware checksum utility — a simple application designed to help you verify the integrity of your files, find duplicates and much more!

Main Features

  • Verify the integrity of downloaded files
  • Find and remove duplicate files from your computer
  • Compare copied/transferred files
  • Support for all the hashes you'll ever need: CRC32, ED2K, MD4, MD5, RIPEMD160, SHA1, SHA1-Base32, SHA256, SHA384, SHA512 and WHIRLPOOL
  • Simple interface with full Unicode and Drag&Drop support
  • It's portable - run anywhere without any installation


Program Size SHA1
CHK v1.50 Win64 Portable 2.16 MB AE7F0FA288E8A4B7BF32259F2244E0849B041E76
CHK v1.50 Win32 Portable 1.38 MB 36189FF6F950D69AF759624E7A5A8CB041477453
Instructions: Download and extract the ZIP package, run chk.exe
Get it from CNET!

Data Compression Software

Selection of the most interesting projects of my own:
Program Description Used Algorithm(s) Release Date User Interface
BCM v0.14 The ultimate BWT-based file compressor BWT+CM 2013-06-23 Command line
BIM v0.03 High-performance lossless image compressor. Currently BIM supports 24-bit BMP, TGA and PNM/PPM images LPC+CM 2013-09-13 Command line
PPMX v0.09 Original, small and fast PPM implementation PPM 2014-03-24 Command line
LZSS v0.02 Optimized LZSS compressor LZSS 2014-02-07 Command line
PIM v2.90 Fully-featured file archiver with smart algorithm selection. In addition, PIM supports extraction for ZIP, JAR, QUAKE PAK, PK3, PK4, QUAD and BALZ archives PPMD, BALZ, BZIP2, preprocessing 2009-01-01 Graphic
PIMPLE v1.43 Quite old, but extremely powerful compressor with many options to play with LZP+CM, preprocessing



Source Forge

My Open Source projects @
  • CRUSH — LZ77-based file compressor (Public Domain, 2013)
  • BALZ — ROLZ-based file compressor (Public Domain, 2008)
  • QUAD — ROLZ-based file compressor (LGPL, 2007)
  • LZPX — LZP-based file compressor (GPL, 2005)
  • Also PeaZip file archiver (QUAD/BALZ compression)




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