CHK Hash Tool

CHK v5.25 Screenshot


CHK is an advanced hash tool — 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, including CRC-32, MD5, SHA1, BLAKE3, xxHash3-64 and much more
  • Quick check the LZ4 Compression Ratio and Shannon Entropy of any file
  • 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 BLAKE2s-128
CHK v5.25 Win64 Portable 2.18 MB A818A878365488050D528F6D0885F638
Language Packs (English, French, German, Greek, Italian, Korean, Simplified Chinese) 9 KB E666CC41718D1F9222DE44A60C414F18
Instructions: Download the ZIP package and extract to a folder of your choice. Launch chk.exe
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Data Compression Software

Selection of my proprietary software:
Program Description Used Algorithm(s) Release Date User Interface
BCM v2.03 The ultimate BWT-based file compressor BWT+CM, preprocessing 2023-02-27 Command line
ULZ v1.02 BETA An ultra-fast LZ77 compressor LZ77 2021-03-14 Command line
LZPM v0.18 A highly asymmetric LZ77-based file compressor with Optimal Parsing LZ77+ARI 2020-08-20 Command line
SQUID v0.03 A fast LZP-based file compressor LZP+ARI 2018-10-03 Command line
PPMX v0.09 Original, small and fast PPM implementation PPM 2014-03-24 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
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


My open source projects:
  • CRUSH — An LZ77-based file compressor (Public Domain, 2013)
  • BALZ — A ROLZ-based file compressor (Public Domain, 2008)
  • QUAD — A ROLZ-based file compressor (LGPL, 2007)
  • LZPX — An LZP-based file compressor (GPL, 2005)




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© 2003—2024 Ilya Muravyov