CHK Checksum Utility

CHK v1.73 Screenshot


CHK is an advanced 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/transferred files
  • Find and get rid of duplicate files on your computer
  • Support for all the hashes you'll ever need: CRC16, CRC32, CRC64, ED2K, MD4, MD5, RIPEMD160, SHA1, SHA1-Base32, SHA224, SHA256, SHA384, SHA512, Tiger and Whirlpool
  • Simple interface with full Unicode and Drag&Drop support
  • It's portable - run anywhere without any installation
  • And last but not least - it's FREE!


Program Size SHA1
CHK v1.73 Win64 Portable 1.89 MB 2F08F1649540FC3CE269C4B3DC8836D38952D1EF
CHK v1.73 Win32 Portable 1.47 MB 7D5BA1063947EA48AB2B5F4C6E0AADBC9824FD2B
Instructions: Download the ZIP package and extract to a folder of your choice. Launch 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 A 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
LZF v1.02 A LibLZF compatible compressor which uses optimized string parsing to provide a higher compression LZ77 2014-10-02 Command line
PIM v2.90 A 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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