Open Source Software

Last updated: 2026-04-23

ZIP Extractor is built with help from the open source components listed below. Thanks to the authors and maintainers who make them available. Each component is governed by its own license terms, summarized in the tables that follow.

Document & Media Viewer Libraries

LibraryVersionPurposeLicenseCopyright
PDF.js5.3.31PDF renderingApache 2.0Copyright © 2024 Mozilla Foundation
LaTeX.js-LaTeX to HTML renderingMITCopyright © LaTeX.js contributors (bundled Computer Modern and KaTeX fonts are licensed under SIL OFL 1.1 - see Fonts section)
Marked15.0.12Markdown renderingMITCopyright © 2011-2025 Christopher Jeffrey
RTFJS / EMFJS / WMFJS-RTF, EMF, WMF document renderingMITCopyright © 2015 Thomas Bluemel; Copyright © 2016-2020 Tom Zoehner; Copyright © 2018 Thomas Bluemel; Copyright © 2020 Ynse Hoornenborg
EPUB.js-EPUB readerBSD 2-ClauseCopyright © FuturePress
UTIF.js-TIFF image decodingMITCopyright © 2017 Photopea
PapaParse5.5.3CSV parsingMITCopyright © Milo Holt
Google Code Prettify-Syntax highlightingApache 2.0Copyright © 2006 Google Inc.
jsmediatags3.9.7Audio metadata reading (ID3, etc.)BSD 3-ClauseCopyright © Jerémie Wenger

Compression & Decompression Libraries

LibraryPurposeLicenseCopyright / Attribution
fzstdZstandard decompressionMITCopyright © 2020 Arjun Barrett
Brotli.jsBrotli decompressionApache 2.0 (original) / MIT (JS port)Copyright © 2013 Google Inc. (original Brotli); Copyright © foliojs (JavaScript port)
JZlib-derived Deflate/InflateDeflate/Inflate compressionBSD 3-ClauseCopyright © 2013 Gildas Lormeau; based on JZlib 1.0.2 by ymnk/JCraft and zlib 1.1.3 by Jean-loup Gailly & Mark Adler
LZMA SDKLZMA/LZMA2 decompressionPublic DomainIgor Pavlov / 7-Zip
PPMd (variant I)PPMd decompressionPublic DomainDmitry Shkarin (via 7-Zip SDK)
bzip2Bzip2 decompressionbzip2/libbzip2 license (BSD-style)Original bzip2: Copyright © 1996-2010 Julian Seward. JavaScript implementation: Copyright © 2013-2026 Visware, LLC.
LZ4LZ4 frame & block decompressionBSD 2-ClauseLZ4 original: Copyright © 2011-2020 Yann Collet. JavaScript implementation: Copyright © 2025-2026 Visware, LLC.
XZ/LZMA2XZ container decompressionPublic DomainBased on LZMA SDK and the XZ specification (tukaani.org)
ncompressUnix compress (.Z) LZW decompressionSee upstream (ncompress)ncompress project
JSZipZIP support (EPUB.js dependency)MIT *Copyright © 2009-2016 Stuart Knightley; includes pako (MIT) by Vitaly Puzrin, Andrey Tupitsin

* JSZip is dual-licensed under the MIT License or GPLv3. ZIP Extractor uses JSZip under the MIT License.

Cryptography Libraries

LibraryPurposeLicenseCopyright
SJCL (subset)AES-CBC for RAR archive headersBSD 2-Clause *Copyright © 2009-2015 Emily Stark, Mike Hamburg, Dan Boneh, Stanford University
aes-jsAES encryption/decryption (WinZip AES, 7z AES)MITCopyright © 2015-2018 Richard Moore
js-sha256SHA-256 hashing (7z key derivation)MITCopyright © 2014-2017 Chen, Yi-Cyuan

* SJCL is dual-licensed under the BSD 2-Clause License or GPLv2. ZIP Extractor uses SJCL under the BSD 2-Clause License.

Utility Libraries

LibraryVersionPurposeLicenseCopyright
DOMPurify3.3.2HTML sanitizationApache 2.0 / MPL 2.0Copyright © Cure53 and contributors
Panzoom4.6.0Image pan and zoomMITCopyright © 2016-2019 Timmy Willison
cptable.js (SheetJS)1.15.0Code page conversion (RTF)Apache 2.0Copyright © 2013-present SheetJS (bundled inside RTFJS)
he1.2.0HTML entity decoder (LaTeX.js dependency)MITCopyright © Mathias Bynens (bundled inside LaTeX.js)

Fonts

FontPurposeLicenseAttribution
RobotoApplication UI typographyApache 2.0Copyright © Google LLC
Roboto MonoMonospaced text in application UIApache 2.0Copyright © Google LLC
Google Material IconsIcon glyphs in application UIApache 2.0Copyright © Google LLC
Computer Modern Unicode & KaTeX fontsLaTeX document rendering (bundled with LaTeX.js)SIL Open Font License 1.1Based on Computer Modern by Donald E. Knuth; additional weights by Andrey V. Panov and KaTeX font contributors

License Texts

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Apache License 2.0

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

BSD 2-Clause License

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

BSD 3-Clause License

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

bzip2/libbzip2 License

The bzip2/libbzip2 license is a BSD-style permissive license. The full text is distributed with the bzip2 source tree:
https://sourceware.org/git/?p=bzip2.git;a=blob;f=LICENSE

Mozilla Public License 2.0

The full text of the Mozilla Public License 2.0 is available at:
https://www.mozilla.org/en-US/MPL/2.0/

SIL Open Font License 1.1

The full text of the SIL Open Font License 1.1 is available at:
https://scripts.sil.org/OFL