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

Library Version Purpose License Copyright
PDF.js 5.3.31 PDF rendering Apache 2.0 Copyright © 2024 Mozilla Foundation
LaTeX.js - LaTeX to HTML rendering MIT Copyright © LaTeX.js contributors (bundled Computer Modern and KaTeX fonts are licensed under SIL OFL 1.1 - see Fonts section)
Marked 15.0.12 Markdown rendering MIT Copyright © 2011-2025 Christopher Jeffrey
RTFJS / EMFJS / WMFJS - RTF, EMF, WMF document rendering MIT Copyright © 2015 Thomas Bluemel; Copyright © 2016-2020 Tom Zoehner; Copyright © 2018 Thomas Bluemel; Copyright © 2020 Ynse Hoornenborg
EPUB.js - EPUB reader BSD 2-Clause Copyright © FuturePress
UTIF.js - TIFF image decoding MIT Copyright © 2017 Photopea
PapaParse 5.5.3 CSV parsing MIT Copyright © Milo Holt
Google Code Prettify - Syntax highlighting Apache 2.0 Copyright © 2006 Google Inc.
jsmediatags 3.9.7 Audio metadata reading (ID3, etc.) BSD 3-Clause Copyright © Jerémie Wenger

Compression & Decompression Libraries

Library Purpose License Copyright / Attribution
fzstd Zstandard decompression MIT Copyright © 2020 Arjun Barrett
Brotli.js Brotli decompression Apache 2.0 (original) / MIT (JS port) Copyright © 2013 Google Inc. (original Brotli); Copyright © foliojs (JavaScript port)
JZlib-derived Deflate/Inflate Deflate/Inflate compression BSD 3-Clause Copyright © 2013 Gildas Lormeau; based on JZlib 1.0.2 by ymnk/JCraft and zlib 1.1.3 by Jean-loup Gailly & Mark Adler
LZMA SDK LZMA/LZMA2 decompression Public Domain Igor Pavlov / 7-Zip
PPMd (variant I) PPMd decompression Public Domain Dmitry Shkarin (via 7-Zip SDK)
bzip2 Bzip2 decompression bzip2/libbzip2 license (BSD-style) Original bzip2: Copyright © 1996-2010 Julian Seward. JavaScript implementation: Copyright © 2013-2026 Visware, LLC.
LZ4 LZ4 frame & block decompression BSD 2-Clause LZ4 original: Copyright © 2011-2020 Yann Collet. JavaScript implementation: Copyright © 2025-2026 Visware, LLC.
XZ/LZMA2 XZ container decompression Public Domain Based on LZMA SDK and the XZ specification (tukaani.org)
ncompress Unix compress (.Z) LZW decompression See upstream (ncompress) ncompress project
JSZip ZIP 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

Library Purpose License Copyright
SJCL (subset) AES-CBC for RAR archive headers BSD 2-Clause * Copyright © 2009-2015 Emily Stark, Mike Hamburg, Dan Boneh, Stanford University
aes-js AES encryption/decryption (WinZip AES, 7z AES) MIT Copyright © 2015-2018 Richard Moore
js-sha256 SHA-256 hashing (7z key derivation) MIT Copyright © 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

Library Version Purpose License Copyright
DOMPurify 3.3.2 HTML sanitization Apache 2.0 / MPL 2.0 Copyright © Cure53 and contributors
Panzoom 4.6.0 Image pan and zoom MIT Copyright © 2016-2019 Timmy Willison
cptable.js (SheetJS) 1.15.0 Code page conversion (RTF) Apache 2.0 Copyright © 2013-present SheetJS (bundled inside RTFJS)
he 1.2.0 HTML entity decoder (LaTeX.js dependency) MIT Copyright © Mathias Bynens (bundled inside LaTeX.js)

Fonts

Font Purpose License Attribution
Roboto Application UI typography Apache 2.0 Copyright © Google LLC
Roboto Mono Monospaced text in application UI Apache 2.0 Copyright © Google LLC
Google Material Icons Icon glyphs in application UI Apache 2.0 Copyright © Google LLC
Computer Modern Unicode & KaTeX fonts LaTeX document rendering (bundled with LaTeX.js) SIL Open Font License 1.1 Based 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