7-Zip, compiled to WebAssembly by the 7z-wasm project (version 1.2.0, based on 7-Zip 24.09)
Used by UtilSlate's RAR Extractor, 7Z Extractor, Archive Converter, Unzip (encrypted ZIP files)
and TAR Extractor (.tar.bz2 and .tar.xz). The files are served unmodified.

7-Zip source code: https://www.7-zip.org/
7z-wasm build source: https://github.com/use-strict/7z-wasm
GNU LGPL 2.1 text: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html

==============================================================================
License.txt (from the 7z-wasm package)
==============================================================================

7-Zip
  ~~~~~
  License for use and distribution
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  7-Zip Copyright (C) 1999-2015 Igor Pavlov.

  Licenses for files are:

    1) 7zz.*.js, 7zz.wasm: GNU LGPL + unRAR restriction
    2) All other files:  GNU LGPL

  The GNU LGPL + unRAR restriction means that you must follow both
  GNU LGPL rules and unRAR restriction rules.


  Note:
    You can use 7-Zip on any computer, including a computer in a commercial
    organization. You don't need to register or pay for 7-Zip.


  GNU LGPL information
  --------------------

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You can receive a copy of the GNU Lesser General Public License from
    http://www.gnu.org/


  unRAR restriction
  -----------------

    The decompression engine for RAR archives was developed using source
    code of unRAR program.
    All copyrights to original unRAR code are owned by Alexander Roshal.

    The license for original unRAR code has the following restriction:

      The unRAR sources cannot be used to re-create the RAR compression algorithm,
      which is proprietary. Distribution of modified unRAR sources in separate form
      or as a part of other software is permitted, provided that it is clearly
      stated in the documentation and source comments that the code may
      not be used to develop a RAR (WinRAR) compatible archiver.


  --
  Igor Pavlov

==============================================================================
unRarLicense.txt (from the 7z-wasm package)
==============================================================================

******    *****   ******   unRAR - free utility for RAR archives
 **   **  **   **  **   **  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 ******   *******  ******    License for use and distribution of
 **   **  **   **  **   **   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 **   **  **   **  **   **         FREE portable version
                                   ~~~~~~~~~~~~~~~~~~~~~

      The source code of unRAR utility is freeware. This means:

   1. All copyrights to RAR and the utility unRAR are exclusively
      owned by the author - Alexander Roshal.

   2. The unRAR sources may be used in any software to handle RAR
      archives without limitations free of charge, but cannot be used
      to re-create the RAR compression algorithm, which is proprietary.
      Distribution of modified unRAR sources in separate form or as a
      part of other software is permitted, provided that it is clearly
      stated in the documentation and source comments that the code may
      not be used to develop a RAR (WinRAR) compatible archiver.

   3. The unRAR utility may be freely distributed. No person or company 
      may charge a fee for the distribution of unRAR without written
      permission from the copyright holder.

   4. THE RAR ARCHIVER AND THE UNRAR UTILITY ARE DISTRIBUTED "AS IS".
      NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.  YOU USE AT 
      YOUR OWN RISK. THE AUTHOR WILL NOT BE LIABLE FOR DATA LOSS, 
      DAMAGES, LOSS OF PROFITS OR ANY OTHER KIND OF LOSS WHILE USING
      OR MISUSING THIS SOFTWARE.

   5. Installing and using the unRAR utility signifies acceptance of
      these terms and conditions of the license.

   6. If you don't agree with terms of the license you must remove
      unRAR files from your storage devices and cease to use the
      utility.

      Thank you for your interest in RAR and unRAR.


                                            Alexander L. Roshal