R. Nausedat

Author Homepage: http://www.sqx-archiver.org

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The latest version - FastReport VCL 2022.2 - includes:

  • Support for Delphi 7-XE8, C++Builder 2005-XE8, Embarcadero Rad Studio 11 and Lazarus
  • Extended interactive functionality
  • Connection to 20+ databases
  • Export in 45 Data Formats
  • 40 types of bar codes
  • Support for 48 Languages
  • Cloud service integration

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SQX-SDK v.2.06

Components > Data Compress > Custom formats

By R. Nausedat.

Freeware + source 03 Jul 2014


The SQX archiver is a high performance file archiver. It was developed because the specifications for most other archivers are not fully available to third parties.

You are allowed to freely use the provided format specifications, the source code, source samples and precompiled DLLs all without paying any license fees.

The main advantages of SQX format are:

  • Main compressor is a LZH variant supporting LZ dictionaries from 32K up to 4096K
  • Ultra compression mode with dictionary up to 32768K
  • Several compressor extensions to handle multimedia data
  • High speed audio (WAV) compressor
  • Special compressor stage for IA32 executables
  • Solid and non-solid archives support
  • Strong 128/256-bit AES encryption (Rijndael) for file data
  • Independent encryption of archive directories
  • Internal and external data recovery records
  • Full support for 64-bit file systems (the size of archives and archive volumes is limited only by the OS)
  • Support for digitally signed archives (envelope up to 512 bit, encrypted with 2 * 1024 bit)
  • SFX modules for DOS (32bit PMode), Win32 and x64. All SFX modules support multi-volume archives
  • Archive and file comments.


  • Status: Fully functional
  • Source: Included
  • Size: 3 648kB

Platforms: C2k10, C2k6, C2k7, C2k9, CB5, CB6, D2005, D2006, D2007, D2009, D2010, D4, D5, D6, D7