Open Source Licenses

Updated: 29 August 2026

Thank you

Keepdesk is built on the open-source software listed below. The MIT License requires that copyright notices be included with copies of the software; this page is that notice.

hwp-convert — MIT License

https://github.com/shyang1012/hwp-convert

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.

fflate — MIT License

https://github.com/101arrowz/fflate

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.

@rhwp/core — MIT License

https://github.com/edwardkim/rhwp

The Rust + WebAssembly engine that draws the original page layout.

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.

pdf.js (pdfjs-dist) — Apache License 2.0

https://github.com/mozilla/pdf.js

The engine that parses and renders PDF pages (PDF → image).

Used under the Apache License, Version 2.0, which requires this copyright notice and a copy of the license.
Full text: https://www.apache.org/licenses/LICENSE-2.0 — the software is provided "AS IS", without warranties of any kind.

pdf-lib — MIT License

https://github.com/Hopding/pdf-lib

Used to merge and split PDFs.

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.

qrcode-generator — MIT License

https://github.com/kazuhikoarase/qrcode-generator

Used to generate QR codes. QR Code is a registered trademark of DENSO WAVE INCORPORATED.

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.

Inter (font) — SIL Open Font License 1.1

https://github.com/rsms/inter

Used for the logo wordmark and brand name. Full text: https://openfontlicense.org

This font is used under the SIL Open Font License 1.1. It may be used freely provided the font itself is not sold and this notice is retained.

SheetJS Community Edition — Apache License 2.0

https://sheetjs.com

Reads and writes Excel and CSV (CSV converter, Excel merge). The 0.20.3 distribution contains no NOTICE file (checked).

Used under the Apache License 2.0. Full text: https://www.apache.org/licenses/LICENSE-2.0

PptxGenJS — MIT License

https://github.com/gitbrent/PptxGenJS

Builds PPTX files for PDF to PowerPoint and Photos to PowerPoint.

Used under the MIT License with the copyright notice retained.

gifenc — MIT License

https://github.com/mattdesl/gifenc

Used to save GIF in the image format converter (colour reduction and GIF writing).

Used under the MIT License; copyright notices are kept, with the full text at the top of the bundled file.

UTIF.js — MIT License

https://github.com/photopea/UTIF.js

Used to read TIFF images that browsers cannot open.

Used under the MIT License; copyright notices are kept, with the full text at the top of the bundled file.

pako (inflate) — MIT License · Zlib License

https://github.com/nodeca/pako

Used by UTIF.js to decompress TIFF files.

Used under the MIT and Zlib licenses; copyright notices are kept.

CMU Pronouncing Dictionary — BSD 2-Clause-style license

https://github.com/cmusphinx/cmudict

Used by the English to IPA tool to look up US English pronunciations. Each split copy under /vendor/cmudict/ keeps the copyright notice, conditions and disclaimer; the full text is at /vendor/cmudict/LICENSE.txt.

Redistributed under its license terms with the notice, conditions and disclaimer retained. Carnegie Mellon University provides the dictionary as is, without warranty.

ONNX Runtime Web — MIT License

https://github.com/microsoft/onnxruntime

Runs the background-removal model in the browser.

Used under the MIT License with the copyright notice retained.

mediabunny — reading and writing video in the video editor — Mozilla Public License 2.0

https://github.com/Vanilagy/mediabunny

Shipped unmodified. Source: https://www.npmjs.com/package/mediabunny/v/1.61.0 · Full text: /vendor/mediabunny/LICENSE.txt

Distributed unmodified under the MPL 2.0 with its notice and full text.

48 design fonts (Google Fonts) — SIL Open Font License 1.1

https://fonts.google.com/

Noto Sans KR, Noto Serif KR (Google), IBM Plex Sans KR (IBM), Nanum Gothic, Nanum Myeongjo, Nanum Pen Script (NAVER), Gowun Dodum, Gowun Batang, Hahmlet, Black Han Sans, Do Hyeon, Jua, Gasoek One, Bagel Fat One, Sunflower, Dongle, Song Myung, Gugi, Orbit, Yeon Sung, Stylish, Gaegu, Hi Melody, Poor Story, Cute Font, East Sea Dokdo, Dokdo, Inter, Montserrat, Poppins, Raleway, Space Grotesk, Playfair Display, Lora, DM Serif Display, Roboto Slab, Bebas Neue, Oswald, Anton, Archivo Black, Abril Fatface, Righteous, Lobster, Pacifico, Caveat, Dancing Script, Great Vibes, JetBrains Mono — copyright their respective authors

Used in the design editor. Copied to our own site so no request goes to Google. Full text: /vendor/gfonts/LICENSE-OFL.txt

Used under the SIL Open Font License 1.1; the fonts are not sold and the notices are retained.

U²-Net / U²-Netp (model) — Apache License 2.0

https://github.com/xuebinqin/U-2-Net

U²-Net: Xuebin Qin et al. (xuebinqin/U-2-Net)

The lightweight model (u2netp) used by the AI background-removal mode. The ONNX file is the unmodified copy distributed by the rembg project (MIT). The original repository has no NOTICE file (checked).

Used under the Apache License 2.0. Full text: https://www.apache.org/licenses/LICENSE-2.0

Pretendard (font) — SIL Open Font License 1.1

https://github.com/orioncactus/pretendard

Used for the Keepdesk Studio name and PRO badge (subset). Full text: /assets/fonts/LICENSE-Pretendard.txt

This font is used under the SIL Open Font License 1.1. It may be used freely provided the font itself is not sold and this notice is retained.

Manrope (font) — SIL Open Font License 1.1

https://github.com/googlefonts/manrope

Used for numerals in body text (subset: digits, %, ×, ÷). Full text: https://openfontlicense.org

This font is used under the SIL Open Font License 1.1. It may be used freely provided the font itself is not sold and this notice is retained.

File format specifications

HWPX is published as Korean national standard KS X 6101 (OWPML). The HWP binary format is handled by an open-source implementation built from the format owner's publicly released specification.